LayerOne
/
LayerOne2017_emu
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Dependencies: SDFileSystem mbed-dev
Fork of
Nucleo_Ex06_EMU
by 
woodstock .
pNesX.cpp@0:3dac1f1bc9e0, 2016-04-03 (annotated)
- Committer:
- beaglescout007
- Date:
- Sun Apr 03 07:45:29 2016 +0000
- Revision:
- 0:3dac1f1bc9e0
Release
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| beaglescout007 | 0:3dac1f1bc9e0 | 1 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 2 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 3 | /* pNesX.cpp : NES Emulator for PSX */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 4 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 5 | /* 1999/11/03 Racoon New preparation */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 6 | /* 2016/ 1/20 Racoon Some optimization. */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 7 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 8 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 9 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 10 | /*------------------------------------------------------------------- |
| beaglescout007 | 0:3dac1f1bc9e0 | 11 | * File List : |
| beaglescout007 | 0:3dac1f1bc9e0 | 12 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 13 | * [NES Hardware] |
| beaglescout007 | 0:3dac1f1bc9e0 | 14 | * pNesX.cpp |
| beaglescout007 | 0:3dac1f1bc9e0 | 15 | * pNesX.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 16 | * K6502_rw.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 17 | * pNesX_Apu.cpp (Added) |
| beaglescout007 | 0:3dac1f1bc9e0 | 18 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 19 | * [Mapper function] |
| beaglescout007 | 0:3dac1f1bc9e0 | 20 | * pNesX_Mapper.cpp |
| beaglescout007 | 0:3dac1f1bc9e0 | 21 | * pNesX_Mapper.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 22 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 23 | * [The function which depends on a system] |
| beaglescout007 | 0:3dac1f1bc9e0 | 24 | * pNesX_System_ooo.cpp (ooo is a system name. psx, win, Nucleo...) |
| beaglescout007 | 0:3dac1f1bc9e0 | 25 | * pNesX_System.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 26 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 27 | * [CPU] |
| beaglescout007 | 0:3dac1f1bc9e0 | 28 | * K6502.cpp |
| beaglescout007 | 0:3dac1f1bc9e0 | 29 | * K6502.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 30 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 31 | * [Others] |
| beaglescout007 | 0:3dac1f1bc9e0 | 32 | * pNesX_Types.h |
| beaglescout007 | 0:3dac1f1bc9e0 | 33 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 34 | --------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 35 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 36 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 37 | /* Include files */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 38 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 39 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 40 | #include "mbed.h" |
| beaglescout007 | 0:3dac1f1bc9e0 | 41 | #include "pNesX.h" |
| beaglescout007 | 0:3dac1f1bc9e0 | 42 | #include "pNesX_System.h" |
| beaglescout007 | 0:3dac1f1bc9e0 | 43 | #include "pNesX_Mapper.h" |
| beaglescout007 | 0:3dac1f1bc9e0 | 44 | #include "K6502.h" |
| beaglescout007 | 0:3dac1f1bc9e0 | 45 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 46 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 47 | /* NES resources */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 48 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 49 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 50 | /* RAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 51 | BYTE RAM[ RAM_SIZE ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 52 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 53 | /* SRAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 54 | BYTE SRAM[ SRAM_SIZE ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 55 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 56 | /* ROM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 57 | BYTE *ROM; |
| beaglescout007 | 0:3dac1f1bc9e0 | 58 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 59 | /* ROM BANK ( 8Kb * 4 ) */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 60 | BYTE *ROMBANK0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 61 | BYTE *ROMBANK1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 62 | BYTE *ROMBANK2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 63 | BYTE *ROMBANK3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 64 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 65 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 66 | /* PPU resources */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 67 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 68 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 69 | /* PPU RAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 70 | BYTE PPURAM[ PPURAM_SIZE ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 71 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 72 | /* VROM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 73 | BYTE *VROM; |
| beaglescout007 | 0:3dac1f1bc9e0 | 74 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 75 | /* PPU BANK ( 1Kb * 16 ) */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 76 | BYTE *PPUBANK[ 16 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 77 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 78 | /* Sprite RAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 79 | BYTE SPRRAM[ SPRRAM_SIZE ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 80 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 81 | /* PPU Register */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 82 | BYTE PPU_R0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 83 | BYTE PPU_R1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 84 | BYTE PPU_R2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 85 | BYTE PPU_R3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 86 | BYTE PPU_R7; |
| beaglescout007 | 0:3dac1f1bc9e0 | 87 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 88 | /* Flag for PPU Address and Scroll Latch */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 89 | BYTE PPU_Latch_Flag; |
| beaglescout007 | 0:3dac1f1bc9e0 | 90 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 91 | /* Vertical scroll value */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 92 | BYTE PPU_Scr_V; |
| beaglescout007 | 0:3dac1f1bc9e0 | 93 | BYTE PPU_Scr_V_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 94 | BYTE PPU_Scr_V_Byte; |
| beaglescout007 | 0:3dac1f1bc9e0 | 95 | BYTE PPU_Scr_V_Byte_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 96 | BYTE PPU_Scr_V_Bit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 97 | BYTE PPU_Scr_V_Bit_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 98 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 99 | /* Horizontal scroll value */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 100 | BYTE PPU_Scr_H; |
| beaglescout007 | 0:3dac1f1bc9e0 | 101 | BYTE PPU_Scr_H_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 102 | BYTE PPU_Scr_H_Byte; |
| beaglescout007 | 0:3dac1f1bc9e0 | 103 | BYTE PPU_Scr_H_Byte_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 104 | BYTE PPU_Scr_H_Bit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 105 | BYTE PPU_Scr_H_Bit_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 106 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 107 | /* PPU Address */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 108 | WORD PPU_Addr; |
| beaglescout007 | 0:3dac1f1bc9e0 | 109 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 110 | /* The increase value of the PPU Address */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 111 | WORD PPU_Increment; |
| beaglescout007 | 0:3dac1f1bc9e0 | 112 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 113 | /* Current Scanline */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 114 | WORD PPU_Scanline; |
| beaglescout007 | 0:3dac1f1bc9e0 | 115 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 116 | /* Scanline Table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 117 | //BYTE PPU_ScanTable[ 263 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 118 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 119 | /* Name Table Bank */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 120 | BYTE PPU_NameTableBank; |
| beaglescout007 | 0:3dac1f1bc9e0 | 121 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 122 | /* BG Base Address */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 123 | BYTE *PPU_BG_Base; |
| beaglescout007 | 0:3dac1f1bc9e0 | 124 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 125 | /* Sprite Base Address */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 126 | BYTE *PPU_SP_Base; |
| beaglescout007 | 0:3dac1f1bc9e0 | 127 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 128 | /* Sprite Height */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 129 | WORD PPU_SP_Height; |
| beaglescout007 | 0:3dac1f1bc9e0 | 130 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 131 | /* Sprite #0 Scanline Hit Position */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 132 | int SpriteHitPos; |
| beaglescout007 | 0:3dac1f1bc9e0 | 133 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 134 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 135 | /* Display and Others resouces */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 136 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 137 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 138 | /* Frame Skip */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 139 | WORD FrameSkip; |
| beaglescout007 | 0:3dac1f1bc9e0 | 140 | WORD FrameCnt; |
| beaglescout007 | 0:3dac1f1bc9e0 | 141 | bool FrameDraw; |
| beaglescout007 | 0:3dac1f1bc9e0 | 142 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 143 | /* Display Line Buffer */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 144 | WORD LineData[2][ NES_DISP_WIDTH ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 145 | WORD *pDrawData; |
| beaglescout007 | 0:3dac1f1bc9e0 | 146 | int LineDataIdx; |
| beaglescout007 | 0:3dac1f1bc9e0 | 147 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 148 | /* Character Buffer */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 149 | BYTE ChrBuf[ 256 * 2 * 8 * 8 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 150 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 151 | /* Update flag for ChrBuf */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 152 | BYTE ChrBufUpdate; |
| beaglescout007 | 0:3dac1f1bc9e0 | 153 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 154 | /* Palette Table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 155 | WORD PalTable[ 32 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 156 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 157 | /* Table for Mirroring */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 158 | const BYTE PPU_MirrorTable[][ 4 ] = |
| beaglescout007 | 0:3dac1f1bc9e0 | 159 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 160 | { NAME_TABLE0, NAME_TABLE0, NAME_TABLE1, NAME_TABLE1 }, |
| beaglescout007 | 0:3dac1f1bc9e0 | 161 | { NAME_TABLE0, NAME_TABLE1, NAME_TABLE0, NAME_TABLE1 }, |
| beaglescout007 | 0:3dac1f1bc9e0 | 162 | { NAME_TABLE1, NAME_TABLE1, NAME_TABLE1, NAME_TABLE1 }, |
| beaglescout007 | 0:3dac1f1bc9e0 | 163 | { NAME_TABLE0, NAME_TABLE0, NAME_TABLE0, NAME_TABLE0 } |
| beaglescout007 | 0:3dac1f1bc9e0 | 164 | }; |
| beaglescout007 | 0:3dac1f1bc9e0 | 165 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 166 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 167 | /* APU and Pad resources */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 168 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 169 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 170 | /* APU Register */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 171 | BYTE APU_Reg[ 0x18 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 172 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 173 | /* Pad data */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 174 | DWORD PAD1_Latch; |
| beaglescout007 | 0:3dac1f1bc9e0 | 175 | DWORD PAD2_Latch; |
| beaglescout007 | 0:3dac1f1bc9e0 | 176 | DWORD PAD_System; |
| beaglescout007 | 0:3dac1f1bc9e0 | 177 | DWORD PAD1_Bit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 178 | DWORD PAD2_Bit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 179 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 180 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 181 | /* Mapper Function */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 182 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 183 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 184 | /* Initialize Mapper */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 185 | void (*MapperInit)(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 186 | /* Write to Mapper */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 187 | void (*MapperWrite)( WORD wAddr, BYTE byData ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 188 | /* Callback at VSync */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 189 | void (*MapperVSync)(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 190 | /* Callback at HSync */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 191 | void (*MapperHSync)(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 192 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 193 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 194 | /* ROM information */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 195 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 196 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 197 | /* .nes File Header */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 198 | struct NesHeader_tag NesHeader; |
| beaglescout007 | 0:3dac1f1bc9e0 | 199 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 200 | /* Mapper Number */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 201 | BYTE MapperNo; |
| beaglescout007 | 0:3dac1f1bc9e0 | 202 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 203 | /* Mirroring 0:Horizontal 1:Vertical */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 204 | BYTE ROM_Mirroring; |
| beaglescout007 | 0:3dac1f1bc9e0 | 205 | /* It has SRAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 206 | BYTE ROM_SRAM; |
| beaglescout007 | 0:3dac1f1bc9e0 | 207 | /* It has Trainer */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 208 | BYTE ROM_Trainer; |
| beaglescout007 | 0:3dac1f1bc9e0 | 209 | /* Four screen VRAM */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 210 | BYTE ROM_FourScr; |
| beaglescout007 | 0:3dac1f1bc9e0 | 211 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 212 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 213 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 214 | /* pNesX_Init() : Initialize pNesX */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 215 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 216 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 217 | void pNesX_Init() |
| beaglescout007 | 0:3dac1f1bc9e0 | 218 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 219 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 220 | * Initialize pNesX |
| beaglescout007 | 0:3dac1f1bc9e0 | 221 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 222 | * Remarks |
| beaglescout007 | 0:3dac1f1bc9e0 | 223 | * Initialize K6502 and Scanline Table. |
| beaglescout007 | 0:3dac1f1bc9e0 | 224 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 225 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 226 | // Initialize 6502 |
| beaglescout007 | 0:3dac1f1bc9e0 | 227 | K6502_Init(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 228 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 229 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 230 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 231 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 232 | /* pNesX_Fin() : Completion treatment */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 233 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 234 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 235 | void pNesX_Fin() |
| beaglescout007 | 0:3dac1f1bc9e0 | 236 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 237 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 238 | * Completion treatment |
| beaglescout007 | 0:3dac1f1bc9e0 | 239 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 240 | * Remarks |
| beaglescout007 | 0:3dac1f1bc9e0 | 241 | * Release resources |
| beaglescout007 | 0:3dac1f1bc9e0 | 242 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 243 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 244 | // Release a memory for ROM |
| beaglescout007 | 0:3dac1f1bc9e0 | 245 | pNesX_ReleaseRom(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 246 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 247 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 248 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 249 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 250 | /* pNesX_Load() : Load a cassette */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 251 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 252 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 253 | int pNesX_Load( const char *pszFileName ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 254 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 255 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 256 | * Load a cassette |
| beaglescout007 | 0:3dac1f1bc9e0 | 257 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 258 | * Parameters |
| beaglescout007 | 0:3dac1f1bc9e0 | 259 | * const char *pszFileName (Read) |
| beaglescout007 | 0:3dac1f1bc9e0 | 260 | * File name of ROM image |
| beaglescout007 | 0:3dac1f1bc9e0 | 261 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 262 | * Return values |
| beaglescout007 | 0:3dac1f1bc9e0 | 263 | * 0 : It was finished normally. |
| beaglescout007 | 0:3dac1f1bc9e0 | 264 | * -1 : An error occurred. |
| beaglescout007 | 0:3dac1f1bc9e0 | 265 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 266 | * Remarks |
| beaglescout007 | 0:3dac1f1bc9e0 | 267 | * Read a ROM image in the memory. |
| beaglescout007 | 0:3dac1f1bc9e0 | 268 | * Reset pNesX. |
| beaglescout007 | 0:3dac1f1bc9e0 | 269 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 270 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 271 | // Release a memory for ROM |
| beaglescout007 | 0:3dac1f1bc9e0 | 272 | pNesX_ReleaseRom(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 273 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 274 | // Read a ROM image in the memory |
| beaglescout007 | 0:3dac1f1bc9e0 | 275 | if ( pNesX_ReadRom( pszFileName ) < 0 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 276 | return -1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 277 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 278 | // Reset pNesX |
| beaglescout007 | 0:3dac1f1bc9e0 | 279 | if ( pNesX_Reset() < 0 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 280 | return -1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 281 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 282 | // Successful |
| beaglescout007 | 0:3dac1f1bc9e0 | 283 | return 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 284 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 285 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 286 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 287 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 288 | /* pNesX_Reset() : Reset pNesX */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 289 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 290 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 291 | int pNesX_Reset() |
| beaglescout007 | 0:3dac1f1bc9e0 | 292 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 293 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 294 | * Reset pNesX |
| beaglescout007 | 0:3dac1f1bc9e0 | 295 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 296 | * Return values |
| beaglescout007 | 0:3dac1f1bc9e0 | 297 | * 0 : Normally |
| beaglescout007 | 0:3dac1f1bc9e0 | 298 | * -1 : Non support mapper |
| beaglescout007 | 0:3dac1f1bc9e0 | 299 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 300 | * Remarks |
| beaglescout007 | 0:3dac1f1bc9e0 | 301 | * Initialize Resources, PPU and Mapper. |
| beaglescout007 | 0:3dac1f1bc9e0 | 302 | * Reset CPU. |
| beaglescout007 | 0:3dac1f1bc9e0 | 303 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 304 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 305 | int nIdx; |
| beaglescout007 | 0:3dac1f1bc9e0 | 306 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 307 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 308 | /* Get information on the cassette */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 309 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 310 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 311 | // Get Mapper Number |
| beaglescout007 | 0:3dac1f1bc9e0 | 312 | MapperNo = NesHeader.byInfo1 >> 4; |
| beaglescout007 | 0:3dac1f1bc9e0 | 313 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 314 | // Check bit counts of Mapper No. |
| beaglescout007 | 0:3dac1f1bc9e0 | 315 | for ( nIdx = 4; nIdx < 8 && NesHeader.byReserve[ nIdx ] == 0; ++nIdx ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 316 | ; |
| beaglescout007 | 0:3dac1f1bc9e0 | 317 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 318 | if ( nIdx == 8 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 319 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 320 | // Mapper Number is 8bits |
| beaglescout007 | 0:3dac1f1bc9e0 | 321 | MapperNo |= ( NesHeader.byInfo2 & 0xf0 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 322 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 323 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 324 | // Get information on the ROM |
| beaglescout007 | 0:3dac1f1bc9e0 | 325 | ROM_Mirroring = NesHeader.byInfo1 & 1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 326 | ROM_SRAM = NesHeader.byInfo1 & 2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 327 | ROM_Trainer = NesHeader.byInfo1 & 4; |
| beaglescout007 | 0:3dac1f1bc9e0 | 328 | ROM_FourScr = NesHeader.byInfo1 & 8; |
| beaglescout007 | 0:3dac1f1bc9e0 | 329 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 330 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 331 | /* Initialize resources */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 332 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 333 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 334 | // Clear RAM |
| beaglescout007 | 0:3dac1f1bc9e0 | 335 | pNesX_MemorySet( RAM, 0, sizeof RAM ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 336 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 337 | // Reset frame skip and frame count |
| beaglescout007 | 0:3dac1f1bc9e0 | 338 | FrameSkip = 2; // 0:full 1:half 2:2/3 3:1/3 |
| beaglescout007 | 0:3dac1f1bc9e0 | 339 | FrameCnt = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 340 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 341 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 342 | // Reset update flag of ChrBuf |
| beaglescout007 | 0:3dac1f1bc9e0 | 343 | ChrBufUpdate = 0xff; |
| beaglescout007 | 0:3dac1f1bc9e0 | 344 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 345 | // Reset palette table |
| beaglescout007 | 0:3dac1f1bc9e0 | 346 | pNesX_MemorySet( PalTable, 0, sizeof PalTable ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 347 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 348 | // Reset APU register |
| beaglescout007 | 0:3dac1f1bc9e0 | 349 | pNesX_MemorySet( APU_Reg, 0, sizeof APU_Reg ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 350 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 351 | // Reset joypad |
| beaglescout007 | 0:3dac1f1bc9e0 | 352 | PAD1_Latch = PAD2_Latch = PAD_System = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 353 | PAD1_Bit = PAD2_Bit = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 354 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 355 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 356 | /* Initialize PPU */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 357 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 358 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 359 | pNesX_SetupPPU(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 360 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 361 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 362 | /* Initialize Mapper */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 363 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 364 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 365 | // Get Mapper Table Index |
| beaglescout007 | 0:3dac1f1bc9e0 | 366 | for ( nIdx = 0; MapperTable[ nIdx ].nMapperNo != -1; ++nIdx ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 367 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 368 | if ( MapperTable[ nIdx ].nMapperNo == MapperNo ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 369 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 370 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 371 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 372 | if ( MapperTable[ nIdx ].nMapperNo == -1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 373 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 374 | // Non support mapper |
| beaglescout007 | 0:3dac1f1bc9e0 | 375 | return -1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 376 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 377 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 378 | // Set up a mapper initialization function |
| beaglescout007 | 0:3dac1f1bc9e0 | 379 | MapperTable[ nIdx ].pMapperInit(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 380 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 381 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 382 | /* Reset CPU */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 383 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 384 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 385 | K6502_Reset(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 386 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 387 | // Successful |
| beaglescout007 | 0:3dac1f1bc9e0 | 388 | return 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 389 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 390 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 391 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 392 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 393 | /* pNesX_SetupPPU() : Initialize PPU */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 394 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 395 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 396 | void pNesX_SetupPPU() |
| beaglescout007 | 0:3dac1f1bc9e0 | 397 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 398 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 399 | * Initialize PPU |
| beaglescout007 | 0:3dac1f1bc9e0 | 400 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 401 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 402 | int nPage; |
| beaglescout007 | 0:3dac1f1bc9e0 | 403 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 404 | // Clear PPU and Sprite Memory |
| beaglescout007 | 0:3dac1f1bc9e0 | 405 | pNesX_MemorySet( PPURAM, 0, sizeof PPURAM ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 406 | pNesX_MemorySet( SPRRAM, 0, sizeof SPRRAM ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 407 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 408 | // Reset PPU Register |
| beaglescout007 | 0:3dac1f1bc9e0 | 409 | PPU_R0 = PPU_R1 = PPU_R2 = PPU_R3 = PPU_R7 = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 410 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 411 | // Reset latch flag |
| beaglescout007 | 0:3dac1f1bc9e0 | 412 | PPU_Latch_Flag = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 413 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 414 | // Reset Scroll values |
| beaglescout007 | 0:3dac1f1bc9e0 | 415 | PPU_Scr_V = PPU_Scr_V_Next = PPU_Scr_V_Byte = PPU_Scr_V_Byte_Next = PPU_Scr_V_Bit = PPU_Scr_V_Bit_Next = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 416 | PPU_Scr_H = PPU_Scr_H_Next = PPU_Scr_H_Byte = PPU_Scr_H_Byte_Next = PPU_Scr_H_Bit = PPU_Scr_H_Bit_Next = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 417 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 418 | // Reset PPU address |
| beaglescout007 | 0:3dac1f1bc9e0 | 419 | PPU_Addr = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 420 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 421 | // Reset scanline |
| beaglescout007 | 0:3dac1f1bc9e0 | 422 | PPU_Scanline = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 423 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 424 | // Reset hit position of sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 425 | SpriteHitPos = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 426 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 427 | // Reset information on PPU_R0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 428 | PPU_Increment = 1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 429 | PPU_NameTableBank = NAME_TABLE0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 430 | PPU_BG_Base = ChrBuf; |
| beaglescout007 | 0:3dac1f1bc9e0 | 431 | PPU_SP_Base = ChrBuf + 256 * 64; |
| beaglescout007 | 0:3dac1f1bc9e0 | 432 | PPU_SP_Height = 8; |
| beaglescout007 | 0:3dac1f1bc9e0 | 433 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 434 | // Reset PPU banks |
| beaglescout007 | 0:3dac1f1bc9e0 | 435 | for ( nPage = 0; nPage < 16; ++nPage ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 436 | PPUBANK[ nPage ] = &PPURAM[ nPage * 0x400 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 437 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 438 | /* Mirroring of Name Table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 439 | pNesX_Mirroring( ROM_Mirroring ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 440 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 441 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 442 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 443 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 444 | /* pNesX_Mirroring() : Set up a Mirroring of Name Table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 445 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 446 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 447 | void pNesX_Mirroring( int nType ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 448 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 449 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 450 | * Set up a Mirroring of Name Table |
| beaglescout007 | 0:3dac1f1bc9e0 | 451 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 452 | * Parameters |
| beaglescout007 | 0:3dac1f1bc9e0 | 453 | * int nType (Read) |
| beaglescout007 | 0:3dac1f1bc9e0 | 454 | * Mirroring Type |
| beaglescout007 | 0:3dac1f1bc9e0 | 455 | * 0 : Horizontal |
| beaglescout007 | 0:3dac1f1bc9e0 | 456 | * 1 : Vertical |
| beaglescout007 | 0:3dac1f1bc9e0 | 457 | * 2 : One Screen 0x2000 |
| beaglescout007 | 0:3dac1f1bc9e0 | 458 | * 3 : One Screen 0x2400 |
| beaglescout007 | 0:3dac1f1bc9e0 | 459 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 460 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 461 | PPUBANK[ NAME_TABLE0 ] = &PPURAM[ PPU_MirrorTable[ nType ][ 0 ] * 0x400 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 462 | PPUBANK[ NAME_TABLE1 ] = &PPURAM[ PPU_MirrorTable[ nType ][ 1 ] * 0x400 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 463 | PPUBANK[ NAME_TABLE2 ] = &PPURAM[ PPU_MirrorTable[ nType ][ 2 ] * 0x400 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 464 | PPUBANK[ NAME_TABLE3 ] = &PPURAM[ PPU_MirrorTable[ nType ][ 3 ] * 0x400 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 465 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 466 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 467 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 468 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 469 | /* pNesX_Main() : The main loop of pNesX */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 470 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 471 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 472 | void pNesX_Main() |
| beaglescout007 | 0:3dac1f1bc9e0 | 473 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 474 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 475 | * The main loop of pNesX |
| beaglescout007 | 0:3dac1f1bc9e0 | 476 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 477 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 478 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 479 | // Initialize pNesX |
| beaglescout007 | 0:3dac1f1bc9e0 | 480 | pNesX_Init(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 481 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 482 | // Main loop |
| beaglescout007 | 0:3dac1f1bc9e0 | 483 | while ( 1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 484 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 485 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 486 | /* To the menu screen */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 487 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 488 | if ( pNesX_Menu() == -1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 489 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 490 | break; // Quit |
| beaglescout007 | 0:3dac1f1bc9e0 | 491 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 492 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 493 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 494 | /* Start a NES emulation */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 495 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 496 | pNesX_Cycle(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 497 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 498 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 499 | // Completion treatment |
| beaglescout007 | 0:3dac1f1bc9e0 | 500 | pNesX_Fin(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 501 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 502 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 503 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 504 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 505 | /* pNesX_Cycle() : The loop of emulation */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 506 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 507 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 508 | void pNesX_Cycle() |
| beaglescout007 | 0:3dac1f1bc9e0 | 509 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 510 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 511 | * The loop of emulation |
| beaglescout007 | 0:3dac1f1bc9e0 | 512 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 513 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 514 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 515 | // Emulation loop |
| beaglescout007 | 0:3dac1f1bc9e0 | 516 | for (;;) |
| beaglescout007 | 0:3dac1f1bc9e0 | 517 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 518 | // Execute instructions |
| beaglescout007 | 0:3dac1f1bc9e0 | 519 | K6502_Step( 40 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 520 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 521 | // Set a flag if a scanning line is a hit in the sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 522 | if ( ( SPRRAM[ SPR_Y ] + SpriteHitPos ) == PPU_Scanline && |
| beaglescout007 | 0:3dac1f1bc9e0 | 523 | PPU_Scanline >= SCAN_ON_SCREEN_START && PPU_Scanline < SCAN_BOTTOM_OFF_SCREEN_START ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 524 | //PPU_ScanTable[ PPU_Scanline ] == SCAN_ON_SCREEN ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 525 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 526 | // Set a sprite hit flag |
| beaglescout007 | 0:3dac1f1bc9e0 | 527 | PPU_R2 |= R2_HIT_SP; |
| beaglescout007 | 0:3dac1f1bc9e0 | 528 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 529 | // NMI is required if there is necessity |
| beaglescout007 | 0:3dac1f1bc9e0 | 530 | if ( ( PPU_R0 & R0_NMI_SP ) && ( PPU_R1 & R1_SHOW_SP ) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 531 | NMI_REQ; |
| beaglescout007 | 0:3dac1f1bc9e0 | 532 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 533 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 534 | // Execute instructions |
| beaglescout007 | 0:3dac1f1bc9e0 | 535 | K6502_Step( 75 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 536 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 537 | // A mapper function in H-Sync |
| beaglescout007 | 0:3dac1f1bc9e0 | 538 | MapperHSync(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 539 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 540 | // A function in H-Sync |
| beaglescout007 | 0:3dac1f1bc9e0 | 541 | if ( pNesX_HSync() == -1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 542 | return; // To the menu screen |
| beaglescout007 | 0:3dac1f1bc9e0 | 543 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 544 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 545 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 546 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 547 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 548 | /* pNesX_HSync() : A function in H-Sync */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 549 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 550 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 551 | int pNesX_HSync() |
| beaglescout007 | 0:3dac1f1bc9e0 | 552 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 553 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 554 | * A function in H-Sync |
| beaglescout007 | 0:3dac1f1bc9e0 | 555 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 556 | * Return values |
| beaglescout007 | 0:3dac1f1bc9e0 | 557 | * 0 : Normally |
| beaglescout007 | 0:3dac1f1bc9e0 | 558 | * -1 : Exit an emulation |
| beaglescout007 | 0:3dac1f1bc9e0 | 559 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 560 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 561 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 562 | /* Render a scanline */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 563 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 564 | if ( FrameDraw && |
| beaglescout007 | 0:3dac1f1bc9e0 | 565 | PPU_Scanline >= SCAN_ON_SCREEN_START && PPU_Scanline < SCAN_BOTTOM_OFF_SCREEN_START ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 566 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 567 | pNesX_DrawLine(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 568 | pNesX_TransmitLinedata(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 569 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 570 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 571 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 572 | /* Set new scroll values */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 573 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 574 | PPU_Scr_V = PPU_Scr_V_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 575 | PPU_Scr_V_Byte = PPU_Scr_V_Byte_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 576 | PPU_Scr_V_Bit = PPU_Scr_V_Bit_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 577 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 578 | PPU_Scr_H = PPU_Scr_H_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 579 | PPU_Scr_H_Byte = PPU_Scr_H_Byte_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 580 | PPU_Scr_H_Bit = PPU_Scr_H_Bit_Next; |
| beaglescout007 | 0:3dac1f1bc9e0 | 581 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 582 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 583 | /* Next Scanline */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 584 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 585 | PPU_Scanline = ( PPU_Scanline == SCAN_VBLANK_END ) ? 0 : PPU_Scanline + 1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 586 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 587 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 588 | /* Operation in the specific scanning line */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 589 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 590 | switch ( PPU_Scanline ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 591 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 592 | case SCAN_ON_SCREEN_START: |
| beaglescout007 | 0:3dac1f1bc9e0 | 593 | // Reset a PPU status |
| beaglescout007 | 0:3dac1f1bc9e0 | 594 | PPU_R2 = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 595 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 596 | // Set up a character data |
| beaglescout007 | 0:3dac1f1bc9e0 | 597 | if ( NesHeader.byVRomSize == 0 && FrameDraw ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 598 | pNesX_SetupChr(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 599 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 600 | // Get position of sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 601 | pNesX_GetSprHitY(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 602 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 603 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 604 | case SCAN_VBLANK_START: |
| beaglescout007 | 0:3dac1f1bc9e0 | 605 | // Frame skip |
| beaglescout007 | 0:3dac1f1bc9e0 | 606 | FrameCnt = ++FrameCnt % 6; |
| beaglescout007 | 0:3dac1f1bc9e0 | 607 | switch (FrameSkip) |
| beaglescout007 | 0:3dac1f1bc9e0 | 608 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 609 | case 0: // full |
| beaglescout007 | 0:3dac1f1bc9e0 | 610 | FrameDraw = true; |
| beaglescout007 | 0:3dac1f1bc9e0 | 611 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 612 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 613 | case 1: // 1/2 |
| beaglescout007 | 0:3dac1f1bc9e0 | 614 | FrameDraw = FrameCnt & 1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 615 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 616 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 617 | case 2: // 2/3 |
| beaglescout007 | 0:3dac1f1bc9e0 | 618 | FrameDraw = !(FrameCnt == 2 || FrameCnt == 5); |
| beaglescout007 | 0:3dac1f1bc9e0 | 619 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 620 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 621 | case 3: // 1/3 |
| beaglescout007 | 0:3dac1f1bc9e0 | 622 | FrameDraw = FrameCnt == 0 || FrameCnt == 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 623 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 624 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 625 | pNesX_LoadFrame(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 626 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 627 | // Set a V-Blank flag |
| beaglescout007 | 0:3dac1f1bc9e0 | 628 | PPU_R2 = R2_IN_VBLANK; |
| beaglescout007 | 0:3dac1f1bc9e0 | 629 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 630 | // Reset latch flag |
| beaglescout007 | 0:3dac1f1bc9e0 | 631 | PPU_Latch_Flag = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 632 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 633 | // A mapper function in V-Sync |
| beaglescout007 | 0:3dac1f1bc9e0 | 634 | MapperVSync(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 635 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 636 | // Get the condition of the joypad |
| beaglescout007 | 0:3dac1f1bc9e0 | 637 | pNesX_PadState( &PAD1_Latch, &PAD2_Latch, &PAD_System ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 638 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 639 | // NMI on V-Blank |
| beaglescout007 | 0:3dac1f1bc9e0 | 640 | if ( PPU_R0 & R0_NMI_VB ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 641 | NMI_REQ; |
| beaglescout007 | 0:3dac1f1bc9e0 | 642 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 643 | // Exit an emulation if a QUIT button is pushed |
| beaglescout007 | 0:3dac1f1bc9e0 | 644 | static DWORD quitWait; |
| beaglescout007 | 0:3dac1f1bc9e0 | 645 | if (PAD_PUSH( PAD_System, PAD_SYS_QUIT )) |
| beaglescout007 | 0:3dac1f1bc9e0 | 646 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 647 | quitWait++; |
| beaglescout007 | 0:3dac1f1bc9e0 | 648 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 649 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 650 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 651 | if (quitWait > 10) |
| beaglescout007 | 0:3dac1f1bc9e0 | 652 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 653 | quitWait = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 654 | return -1; // Exit an emulation |
| beaglescout007 | 0:3dac1f1bc9e0 | 655 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 656 | quitWait = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 657 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 658 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 659 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 660 | case SCAN_APU_CLK1: // 240Hz |
| beaglescout007 | 0:3dac1f1bc9e0 | 661 | case SCAN_APU_CLK3: // 240Hz |
| beaglescout007 | 0:3dac1f1bc9e0 | 662 | pNesX_ApuClk_240Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 663 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 664 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 665 | case SCAN_APU_CLK2: // 240Hz 120Hz |
| beaglescout007 | 0:3dac1f1bc9e0 | 666 | pNesX_ApuClk_240Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 667 | pNesX_ApuClk_120Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 668 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 669 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 670 | case SCAN_APU_CLK4: // 240Hz 120Hz 60Hz |
| beaglescout007 | 0:3dac1f1bc9e0 | 671 | pNesX_ApuClk_240Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 672 | pNesX_ApuClk_120Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 673 | pNesX_ApuClk_60Hz(); |
| beaglescout007 | 0:3dac1f1bc9e0 | 674 | break; |
| beaglescout007 | 0:3dac1f1bc9e0 | 675 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 676 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 677 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 678 | // Successful |
| beaglescout007 | 0:3dac1f1bc9e0 | 679 | return 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 680 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 681 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 682 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 683 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 684 | /* pNesX_DrawLine() : Render a scanline */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 685 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 686 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 687 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 688 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 689 | void pNesX_DrawLine() |
| beaglescout007 | 0:3dac1f1bc9e0 | 690 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 691 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 692 | * Render a scanline |
| beaglescout007 | 0:3dac1f1bc9e0 | 693 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 694 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 695 | int nX; |
| beaglescout007 | 0:3dac1f1bc9e0 | 696 | int nY; |
| beaglescout007 | 0:3dac1f1bc9e0 | 697 | int nY4; |
| beaglescout007 | 0:3dac1f1bc9e0 | 698 | int nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 699 | WORD *pPalTbl; |
| beaglescout007 | 0:3dac1f1bc9e0 | 700 | BYTE *pAttrBase; |
| beaglescout007 | 0:3dac1f1bc9e0 | 701 | WORD *pPoint; |
| beaglescout007 | 0:3dac1f1bc9e0 | 702 | int nNameTable; |
| beaglescout007 | 0:3dac1f1bc9e0 | 703 | BYTE *pbyNameTable; |
| beaglescout007 | 0:3dac1f1bc9e0 | 704 | BYTE *pbyChrData; |
| beaglescout007 | 0:3dac1f1bc9e0 | 705 | BYTE *pSPRRAM; |
| beaglescout007 | 0:3dac1f1bc9e0 | 706 | int nAttr; |
| beaglescout007 | 0:3dac1f1bc9e0 | 707 | int nSprCnt; |
| beaglescout007 | 0:3dac1f1bc9e0 | 708 | int nIdx; |
| beaglescout007 | 0:3dac1f1bc9e0 | 709 | BYTE bySprCol; |
| beaglescout007 | 0:3dac1f1bc9e0 | 710 | bool bMask[ NES_DISP_WIDTH ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 711 | bool *pMask; |
| beaglescout007 | 0:3dac1f1bc9e0 | 712 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 713 | // Pointer to the render position |
| beaglescout007 | 0:3dac1f1bc9e0 | 714 | pPoint = LineData[LineDataIdx]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 715 | LineDataIdx = LineDataIdx == 0 ? 1 : 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 716 | pDrawData = pPoint; |
| beaglescout007 | 0:3dac1f1bc9e0 | 717 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 718 | // Clear a scanline if screen is off |
| beaglescout007 | 0:3dac1f1bc9e0 | 719 | if ( !( PPU_R1 & R1_SHOW_SCR ) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 720 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 721 | pNesX_MemorySet( pPoint, 0, NES_DISP_WIDTH << 1 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 722 | return; |
| beaglescout007 | 0:3dac1f1bc9e0 | 723 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 724 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 725 | nNameTable = PPU_NameTableBank; |
| beaglescout007 | 0:3dac1f1bc9e0 | 726 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 727 | nY = PPU_Scr_V_Byte + ( PPU_Scanline >> 3 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 728 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 729 | nYBit = PPU_Scr_V_Bit + ( PPU_Scanline & 7 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 730 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 731 | if ( nYBit > 7 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 732 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 733 | ++nY; |
| beaglescout007 | 0:3dac1f1bc9e0 | 734 | nYBit &= 7; |
| beaglescout007 | 0:3dac1f1bc9e0 | 735 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 736 | nYBit <<= 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 737 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 738 | if ( nY > 29 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 739 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 740 | // Next NameTable (An up-down direction) |
| beaglescout007 | 0:3dac1f1bc9e0 | 741 | nNameTable ^= NAME_TABLE_V_MASK; |
| beaglescout007 | 0:3dac1f1bc9e0 | 742 | nY -= 30; |
| beaglescout007 | 0:3dac1f1bc9e0 | 743 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 744 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 745 | nX = PPU_Scr_H_Byte; |
| beaglescout007 | 0:3dac1f1bc9e0 | 746 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 747 | nY4 = ( ( nY & 2 ) << 1 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 748 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 749 | pMask = bMask; |
| beaglescout007 | 0:3dac1f1bc9e0 | 750 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 751 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 752 | /* Rendering of the block of the left end */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 753 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 754 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 755 | pbyNameTable = PPUBANK[ nNameTable ] + nY * 32 + nX; |
| beaglescout007 | 0:3dac1f1bc9e0 | 756 | pbyChrData = PPU_BG_Base + ( *pbyNameTable << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 757 | pAttrBase = PPUBANK[ nNameTable ] + 0x3c0 + ( nY / 4 ) * 8; |
| beaglescout007 | 0:3dac1f1bc9e0 | 758 | pPalTbl = &PalTable[ ( ( ( pAttrBase[ nX >> 2 ] >> ( ( nX & 2 ) + nY4 ) ) & 3 ) << 2 ) ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 759 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 760 | for ( nIdx = PPU_Scr_H_Bit; nIdx < 8; ++nIdx ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 761 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 762 | *( pPoint++ ) = pPalTbl[ pbyChrData[ nIdx ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 763 | *pMask++ = pbyChrData[ nIdx ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 764 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 765 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 766 | ++nX; |
| beaglescout007 | 0:3dac1f1bc9e0 | 767 | ++pbyNameTable; |
| beaglescout007 | 0:3dac1f1bc9e0 | 768 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 769 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 770 | /* Rendering of the left table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 771 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 772 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 773 | for ( ; nX < 32; ++nX ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 774 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 775 | pbyChrData = PPU_BG_Base + ( *pbyNameTable << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 776 | pPalTbl = &PalTable[ ( ( ( pAttrBase[ nX >> 2 ] >> ( ( nX & 2 ) + nY4 ) ) & 3 ) << 2 ) ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 777 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 778 | *pPoint++ = pPalTbl[ pbyChrData[ 0 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 779 | *pPoint++ = pPalTbl[ pbyChrData[ 1 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 780 | *pPoint++ = pPalTbl[ pbyChrData[ 2 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 781 | *pPoint++ = pPalTbl[ pbyChrData[ 3 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 782 | *pPoint++ = pPalTbl[ pbyChrData[ 4 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 783 | *pPoint++ = pPalTbl[ pbyChrData[ 5 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 784 | *pPoint++ = pPalTbl[ pbyChrData[ 6 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 785 | *pPoint++ = pPalTbl[ pbyChrData[ 7 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 786 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 787 | *pMask++ = pbyChrData[ 0 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 788 | *pMask++ = pbyChrData[ 1 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 789 | *pMask++ = pbyChrData[ 2 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 790 | *pMask++ = pbyChrData[ 3 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 791 | *pMask++ = pbyChrData[ 4 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 792 | *pMask++ = pbyChrData[ 5 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 793 | *pMask++ = pbyChrData[ 6 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 794 | *pMask++ = pbyChrData[ 7 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 795 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 796 | ++pbyNameTable; |
| beaglescout007 | 0:3dac1f1bc9e0 | 797 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 798 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 799 | // Holizontal Mirror |
| beaglescout007 | 0:3dac1f1bc9e0 | 800 | nNameTable ^= NAME_TABLE_H_MASK; |
| beaglescout007 | 0:3dac1f1bc9e0 | 801 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 802 | pbyNameTable = PPUBANK[ nNameTable ] + nY * 32; |
| beaglescout007 | 0:3dac1f1bc9e0 | 803 | pAttrBase = PPUBANK[ nNameTable ] + 0x3c0 + ( nY / 4 ) * 8; |
| beaglescout007 | 0:3dac1f1bc9e0 | 804 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 805 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 806 | /* Rendering of the right table */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 807 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 808 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 809 | for ( nX = 0; nX < PPU_Scr_H_Byte; ++nX ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 810 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 811 | pbyChrData = PPU_BG_Base + ( *pbyNameTable << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 812 | pPalTbl = &PalTable[ ( ( ( pAttrBase[ nX >> 2 ] >> ( ( nX & 2 ) + nY4 ) ) & 3 ) << 2 ) ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 813 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 814 | *pPoint++ = pPalTbl[ pbyChrData[ 0 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 815 | *pPoint++ = pPalTbl[ pbyChrData[ 1 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 816 | *pPoint++ = pPalTbl[ pbyChrData[ 2 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 817 | *pPoint++ = pPalTbl[ pbyChrData[ 3 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 818 | *pPoint++ = pPalTbl[ pbyChrData[ 4 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 819 | *pPoint++ = pPalTbl[ pbyChrData[ 5 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 820 | *pPoint++ = pPalTbl[ pbyChrData[ 6 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 821 | *pPoint++ = pPalTbl[ pbyChrData[ 7 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 822 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 823 | *pMask++ = pbyChrData[ 0 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 824 | *pMask++ = pbyChrData[ 1 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 825 | *pMask++ = pbyChrData[ 2 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 826 | *pMask++ = pbyChrData[ 3 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 827 | *pMask++ = pbyChrData[ 4 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 828 | *pMask++ = pbyChrData[ 5 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 829 | *pMask++ = pbyChrData[ 6 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 830 | *pMask++ = pbyChrData[ 7 ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 831 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 832 | ++pbyNameTable; |
| beaglescout007 | 0:3dac1f1bc9e0 | 833 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 834 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 835 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 836 | /* Rendering of the block of the right end */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 837 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 838 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 839 | pbyChrData = PPU_BG_Base + ( *pbyNameTable << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 840 | pPalTbl = &PalTable[ ( ( ( pAttrBase[ nX >> 2 ] >> ( ( nX & 2 ) + nY4 ) ) & 3 ) << 2 ) ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 841 | for ( nIdx = 0; nIdx < PPU_Scr_H_Bit; ++nIdx ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 842 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 843 | pPoint[ nIdx ] = pPalTbl[ pbyChrData[ nIdx ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 844 | *pMask++ = pbyChrData[ nIdx ] == 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 845 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 846 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 847 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 848 | /* Render a sprite */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 849 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 850 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 851 | if ( PPU_R1 & R1_SHOW_SP ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 852 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 853 | // Reset Scanline Sprite Count |
| beaglescout007 | 0:3dac1f1bc9e0 | 854 | PPU_R2 &= ~R2_MAX_SP; |
| beaglescout007 | 0:3dac1f1bc9e0 | 855 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 856 | // Render a sprite to the sprite buffer |
| beaglescout007 | 0:3dac1f1bc9e0 | 857 | pPoint = pDrawData; |
| beaglescout007 | 0:3dac1f1bc9e0 | 858 | nSprCnt = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 859 | for ( pSPRRAM = SPRRAM + ( 63 << 2 ); pSPRRAM >= SPRRAM && |
| beaglescout007 | 0:3dac1f1bc9e0 | 860 | nSprCnt < 8; pSPRRAM -= 4 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 861 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 862 | nY = pSPRRAM[ SPR_Y ] + 1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 863 | if ( nY > PPU_Scanline || nY + PPU_SP_Height <= PPU_Scanline ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 864 | continue; // Next sprite |
| beaglescout007 | 0:3dac1f1bc9e0 | 865 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 866 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 867 | /* A sprite in scanning line */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 868 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 869 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 870 | // Holizontal Sprite Count +1 |
| beaglescout007 | 0:3dac1f1bc9e0 | 871 | ++nSprCnt; |
| beaglescout007 | 0:3dac1f1bc9e0 | 872 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 873 | nAttr = pSPRRAM[ SPR_ATTR ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 874 | nYBit = PPU_Scanline - nY; |
| beaglescout007 | 0:3dac1f1bc9e0 | 875 | nYBit = ( nAttr & SPR_ATTR_V_FLIP ) ? ( PPU_SP_Height - nYBit - 1 ) << 3 : nYBit << 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 876 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 877 | if ( PPU_R0 & R0_SP_SIZE ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 878 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 879 | // Sprite size 8x16 |
| beaglescout007 | 0:3dac1f1bc9e0 | 880 | if ( pSPRRAM[ SPR_CHR ] & 1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 881 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 882 | pbyChrData = ChrBuf + 256 * 64 + ( ( pSPRRAM[ SPR_CHR ] & 0xfe ) << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 883 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 884 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 885 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 886 | pbyChrData = ChrBuf + ( ( pSPRRAM[ SPR_CHR ] & 0xfe ) << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 887 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 888 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 889 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 890 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 891 | // Sprite size 8x8 |
| beaglescout007 | 0:3dac1f1bc9e0 | 892 | pbyChrData = PPU_SP_Base + ( pSPRRAM[ SPR_CHR ] << 6 ) + nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 893 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 894 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 895 | bool bSprFront = !(nAttr & SPR_ATTR_PRI); |
| beaglescout007 | 0:3dac1f1bc9e0 | 896 | bySprCol = (( nAttr & SPR_ATTR_COLOR ) << 2) + 0x10; |
| beaglescout007 | 0:3dac1f1bc9e0 | 897 | nX = pSPRRAM[ SPR_X ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 898 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 899 | if ( nAttr & SPR_ATTR_H_FLIP ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 900 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 901 | // Horizontal flip |
| beaglescout007 | 0:3dac1f1bc9e0 | 902 | if ( pbyChrData[ 0 ] && nX < 249 && (bSprFront || bMask[nX + 7]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 903 | pPoint[ nX + 7 ] = PalTable[ bySprCol | pbyChrData[ 0 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 904 | if ( pbyChrData[ 1 ] && nX < 250 && (bSprFront || bMask[nX + 6]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 905 | pPoint[ nX + 6 ] = PalTable[ bySprCol | pbyChrData[ 1 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 906 | if ( pbyChrData[ 2 ] && nX < 251 && (bSprFront || bMask[nX + 5]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 907 | pPoint[ nX + 5 ] = PalTable[ bySprCol | pbyChrData[ 2 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 908 | if ( pbyChrData[ 3 ] && nX < 252 && (bSprFront || bMask[nX + 4]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 909 | pPoint[ nX + 4 ] = PalTable[ bySprCol | pbyChrData[ 3 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 910 | if ( pbyChrData[ 4 ] && nX < 253 && (bSprFront || bMask[nX + 3]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 911 | pPoint[ nX + 3 ] = PalTable[ bySprCol | pbyChrData[ 4 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 912 | if ( pbyChrData[ 5 ] && nX < 254 && (bSprFront || bMask[nX + 2]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 913 | pPoint[ nX + 2 ] = PalTable[ bySprCol | pbyChrData[ 5 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 914 | if ( pbyChrData[ 6 ] && nX < 255 && (bSprFront || bMask[nX + 1]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 915 | pPoint[ nX + 1 ] = PalTable[ bySprCol | pbyChrData[ 6 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 916 | if ( pbyChrData[ 7 ] && (bSprFront || bMask[nX]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 917 | pPoint[ nX ] = PalTable[ bySprCol | pbyChrData[ 7 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 918 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 919 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 920 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 921 | // Non flip |
| beaglescout007 | 0:3dac1f1bc9e0 | 922 | if ( pbyChrData[ 0 ] && (bSprFront || bMask[nX]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 923 | pPoint[ nX ] = PalTable[ bySprCol | pbyChrData[ 0 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 924 | if ( pbyChrData[ 1 ] && nX < 255 && (bSprFront || bMask[nX + 1]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 925 | pPoint[ nX + 1 ] = PalTable[ bySprCol | pbyChrData[ 1 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 926 | if ( pbyChrData[ 2 ] && nX < 254 && (bSprFront || bMask[nX + 2]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 927 | pPoint[ nX + 2 ] = PalTable[ bySprCol | pbyChrData[ 2 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 928 | if ( pbyChrData[ 3 ] && nX < 253 && (bSprFront || bMask[nX + 3]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 929 | pPoint[ nX + 3 ] = PalTable[ bySprCol | pbyChrData[ 3 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 930 | if ( pbyChrData[ 4 ] && nX < 252 && (bSprFront || bMask[nX + 4]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 931 | pPoint[ nX + 4 ] = PalTable[ bySprCol | pbyChrData[ 4 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 932 | if ( pbyChrData[ 5 ] && nX < 251 && (bSprFront || bMask[nX + 5]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 933 | pPoint[ nX + 5 ] = PalTable[ bySprCol | pbyChrData[ 5 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 934 | if ( pbyChrData[ 6 ] && nX < 250 && (bSprFront || bMask[nX + 6]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 935 | pPoint[ nX + 6 ] = PalTable[ bySprCol | pbyChrData[ 6 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 936 | if ( pbyChrData[ 7 ] && nX < 249 && (bSprFront || bMask[nX + 7]) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 937 | pPoint[ nX + 7 ] = PalTable[ bySprCol | pbyChrData[ 7 ] ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 938 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 939 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 940 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 941 | if ( nSprCnt == 8 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 942 | PPU_R2 |= R2_MAX_SP; // Set a flag of maximum sprites on scanline |
| beaglescout007 | 0:3dac1f1bc9e0 | 943 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 944 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 945 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 946 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 947 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 948 | /* pNesX_GetSprHitY() : Get a position of scanline hits sprite #0 */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 949 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 950 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 951 | void pNesX_GetSprHitY() |
| beaglescout007 | 0:3dac1f1bc9e0 | 952 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 953 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 954 | * Get a position of scanline hits sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 955 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 956 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 957 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 958 | int nYBit; |
| beaglescout007 | 0:3dac1f1bc9e0 | 959 | DWORD *pdwChrData; |
| beaglescout007 | 0:3dac1f1bc9e0 | 960 | int nOff; |
| beaglescout007 | 0:3dac1f1bc9e0 | 961 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 962 | if ( SPRRAM[ SPR_ATTR ] & SPR_ATTR_V_FLIP ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 963 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 964 | // Vertical flip |
| beaglescout007 | 0:3dac1f1bc9e0 | 965 | nYBit = ( PPU_SP_Height - 1 ) << 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 966 | nOff = -2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 967 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 968 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 969 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 970 | // Non flip |
| beaglescout007 | 0:3dac1f1bc9e0 | 971 | nYBit = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 972 | nOff = 2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 973 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 974 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 975 | if ( PPU_R0 & R0_SP_SIZE ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 976 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 977 | // Sprite size 8x16 |
| beaglescout007 | 0:3dac1f1bc9e0 | 978 | if ( SPRRAM[ SPR_CHR ] & 1 ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 979 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 980 | pdwChrData = (DWORD *)( ChrBuf + 256 * 64 + ( ( SPRRAM[ SPR_CHR ] & 0xfe ) << 6 ) + nYBit ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 981 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 982 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 983 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 984 | pdwChrData = (DWORD * )( ChrBuf + ( ( SPRRAM[ SPR_CHR ] & 0xfe ) << 6 ) + nYBit ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 985 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 986 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 987 | else |
| beaglescout007 | 0:3dac1f1bc9e0 | 988 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 989 | // Sprite size 8x8 |
| beaglescout007 | 0:3dac1f1bc9e0 | 990 | pdwChrData = (DWORD *)( PPU_SP_Base + ( SPRRAM[ SPR_CHR ] << 6 ) + nYBit ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 991 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 992 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 993 | for ( SpriteHitPos = 1; SpriteHitPos < PPU_SP_Height + 1; ++SpriteHitPos ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 994 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 995 | if ( pdwChrData[ 0 ] | pdwChrData[ 1 ] ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 996 | return; // Scanline hits sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 997 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 998 | pdwChrData += nOff; |
| beaglescout007 | 0:3dac1f1bc9e0 | 999 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1000 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1001 | // Scanline didn't hit sprite #0 |
| beaglescout007 | 0:3dac1f1bc9e0 | 1002 | SpriteHitPos = SCAN_VBLANK_END; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1003 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1004 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1005 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1006 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1007 | /* pNesX_SetupChr() : Develop character data */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1008 | /* */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1009 | /*===================================================================*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1010 | void pNesX_SetupChr() |
| beaglescout007 | 0:3dac1f1bc9e0 | 1011 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 1012 | /* |
| beaglescout007 | 0:3dac1f1bc9e0 | 1013 | * Develop character data |
| beaglescout007 | 0:3dac1f1bc9e0 | 1014 | * |
| beaglescout007 | 0:3dac1f1bc9e0 | 1015 | */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1016 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1017 | BYTE *pbyBGData; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1018 | BYTE byData1; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1019 | BYTE byData2; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1020 | int nIdx; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1021 | int nY; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1022 | int nOff; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1023 | static BYTE *pbyPrevBank[ 8 ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1024 | int nBank; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1025 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1026 | for ( nBank = 0; nBank < 8; ++nBank ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 1027 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 1028 | if ( pbyPrevBank[ nBank ] == PPUBANK[ nBank ] && !( ( ChrBufUpdate >> nBank ) & 1 ) ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 1029 | continue; // Next bank |
| beaglescout007 | 0:3dac1f1bc9e0 | 1030 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1031 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1032 | /* An address is different from the last time */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1033 | /* or */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1034 | /* An update flag is being set */ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1035 | /*-------------------------------------------------------------------*/ |
| beaglescout007 | 0:3dac1f1bc9e0 | 1036 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1037 | for ( nIdx = 0; nIdx < 64; ++nIdx ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 1038 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 1039 | nOff = ( nBank << 12 ) + ( nIdx << 6 ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 1040 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1041 | for ( nY = 0; nY < 8; ++nY ) |
| beaglescout007 | 0:3dac1f1bc9e0 | 1042 | { |
| beaglescout007 | 0:3dac1f1bc9e0 | 1043 | pbyBGData = PPUBANK[ nBank ] + ( nIdx << 4 ) + nY; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1044 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1045 | byData1 = ( ( pbyBGData[ 0 ] >> 1 ) & 0x55 ) | ( pbyBGData[ 8 ] & 0xAA ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 1046 | byData2 = ( pbyBGData[ 0 ] & 0x55 ) | ( ( pbyBGData[ 8 ] << 1 ) & 0xAA ); |
| beaglescout007 | 0:3dac1f1bc9e0 | 1047 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1048 | ChrBuf[ nOff++ ] = ( byData1 >> 6 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1049 | ChrBuf[ nOff++ ] = ( byData2 >> 6 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1050 | ChrBuf[ nOff++ ] = ( byData1 >> 4 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1051 | ChrBuf[ nOff++ ] = ( byData2 >> 4 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1052 | ChrBuf[ nOff++ ] = ( byData1 >> 2 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1053 | ChrBuf[ nOff++ ] = ( byData2 >> 2 ) & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1054 | ChrBuf[ nOff++ ] = byData1 & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1055 | ChrBuf[ nOff++ ] = byData2 & 3; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1056 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1057 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1058 | // Keep this address |
| beaglescout007 | 0:3dac1f1bc9e0 | 1059 | pbyPrevBank[ nBank ] = PPUBANK[ nBank ]; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1060 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1061 | |
| beaglescout007 | 0:3dac1f1bc9e0 | 1062 | // Reset update flag |
| beaglescout007 | 0:3dac1f1bc9e0 | 1063 | ChrBufUpdate = 0; |
| beaglescout007 | 0:3dac1f1bc9e0 | 1064 | } |
| beaglescout007 | 0:3dac1f1bc9e0 | 1065 |