test
Dependencies: SDFileSystem mbed-dev
Fork of Nucleo_Ex06_EMU by
pNesX_Mapper.cpp@4:53ef91c87d74, 2017-05-27 (annotated)
- Committer:
- charliex
- Date:
- Sat May 27 02:17:37 2017 +0000
- Revision:
- 4:53ef91c87d74
- Parent:
- 0:3dac1f1bc9e0
test
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_Mapper.cpp : pNesX Mapper Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 4 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 5 | /* 1999/11/03 Racoon New preparation */ |
beaglescout007 | 0:3dac1f1bc9e0 | 6 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 7 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 8 | |
beaglescout007 | 0:3dac1f1bc9e0 | 9 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 10 | /* Include files */ |
beaglescout007 | 0:3dac1f1bc9e0 | 11 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 12 | |
beaglescout007 | 0:3dac1f1bc9e0 | 13 | #include "pNesX.h" |
beaglescout007 | 0:3dac1f1bc9e0 | 14 | #include "pNesX_System.h" |
beaglescout007 | 0:3dac1f1bc9e0 | 15 | #include "pNesX_Mapper.h" |
beaglescout007 | 0:3dac1f1bc9e0 | 16 | #include "K6502.h" |
beaglescout007 | 0:3dac1f1bc9e0 | 17 | |
beaglescout007 | 0:3dac1f1bc9e0 | 18 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 19 | /* Table of Mapper initialize function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 20 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 21 | |
beaglescout007 | 0:3dac1f1bc9e0 | 22 | struct MapperTable_tag MapperTable[] = |
beaglescout007 | 0:3dac1f1bc9e0 | 23 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 24 | { 0, Map0_Init }, |
beaglescout007 | 0:3dac1f1bc9e0 | 25 | { 1, Map1_Init }, |
beaglescout007 | 0:3dac1f1bc9e0 | 26 | { 2, Map2_Init }, |
beaglescout007 | 0:3dac1f1bc9e0 | 27 | { 3, Map3_Init }, |
beaglescout007 | 0:3dac1f1bc9e0 | 28 | { 4, Map4_Init }, |
beaglescout007 | 0:3dac1f1bc9e0 | 29 | { -1, NULL } |
beaglescout007 | 0:3dac1f1bc9e0 | 30 | }; |
beaglescout007 | 0:3dac1f1bc9e0 | 31 | |
beaglescout007 | 0:3dac1f1bc9e0 | 32 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 33 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 34 | /* Mapper 0 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 35 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 36 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 37 | |
beaglescout007 | 0:3dac1f1bc9e0 | 38 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 39 | /* Initialize Mapper 0 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 40 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 41 | void Map0_Init() |
beaglescout007 | 0:3dac1f1bc9e0 | 42 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 43 | /* Initialize Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 44 | MapperInit = Map0_Init; |
beaglescout007 | 0:3dac1f1bc9e0 | 45 | |
beaglescout007 | 0:3dac1f1bc9e0 | 46 | /* Write to Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 47 | MapperWrite = Map0_Write; |
beaglescout007 | 0:3dac1f1bc9e0 | 48 | |
beaglescout007 | 0:3dac1f1bc9e0 | 49 | /* Callback at VSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 50 | MapperVSync = Map0_VSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 51 | |
beaglescout007 | 0:3dac1f1bc9e0 | 52 | /* Callback at HSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 53 | MapperHSync = Map0_HSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 54 | |
beaglescout007 | 0:3dac1f1bc9e0 | 55 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 56 | ROMBANK0 = ROMPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 57 | ROMBANK1 = ROMPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 58 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 59 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 60 | |
beaglescout007 | 0:3dac1f1bc9e0 | 61 | /* Set PPU Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 62 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 63 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 64 | for ( int nPage = 0; nPage < 8; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 65 | PPUBANK[ nPage ] = &VROM[ nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 66 | |
beaglescout007 | 0:3dac1f1bc9e0 | 67 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 68 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 69 | |
beaglescout007 | 0:3dac1f1bc9e0 | 70 | /* Set up wiring of the interrupt pin */ |
beaglescout007 | 0:3dac1f1bc9e0 | 71 | K6502_Set_Int_Wiring( 1, 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 72 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 73 | |
beaglescout007 | 0:3dac1f1bc9e0 | 74 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 75 | /* Mapper 0 Write Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 76 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 77 | void Map0_Write( WORD wAddr, BYTE byData ) |
beaglescout007 | 0:3dac1f1bc9e0 | 78 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 79 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 80 | * Dummy Write to Mapper |
beaglescout007 | 0:3dac1f1bc9e0 | 81 | * |
beaglescout007 | 0:3dac1f1bc9e0 | 82 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 83 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 84 | |
beaglescout007 | 0:3dac1f1bc9e0 | 85 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 86 | /* Mapper 0 V-Sync Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 87 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 88 | void Map0_VSync() |
beaglescout007 | 0:3dac1f1bc9e0 | 89 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 90 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 91 | * Dummy Callback at VSync |
beaglescout007 | 0:3dac1f1bc9e0 | 92 | * |
beaglescout007 | 0:3dac1f1bc9e0 | 93 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 94 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 95 | |
beaglescout007 | 0:3dac1f1bc9e0 | 96 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 97 | /* Mapper 0 H-Sync Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 98 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 99 | void Map0_HSync() |
beaglescout007 | 0:3dac1f1bc9e0 | 100 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 101 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 102 | * Dummy Callback at HSync |
beaglescout007 | 0:3dac1f1bc9e0 | 103 | * |
beaglescout007 | 0:3dac1f1bc9e0 | 104 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 105 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 106 | |
beaglescout007 | 0:3dac1f1bc9e0 | 107 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 108 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 109 | /* Mapper 1 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 110 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 111 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 112 | |
beaglescout007 | 0:3dac1f1bc9e0 | 113 | BYTE Map1_Reg[ 4 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 114 | |
beaglescout007 | 0:3dac1f1bc9e0 | 115 | int Map1_Cnt; |
beaglescout007 | 0:3dac1f1bc9e0 | 116 | BYTE Map1_Latch; |
beaglescout007 | 0:3dac1f1bc9e0 | 117 | |
beaglescout007 | 0:3dac1f1bc9e0 | 118 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 119 | /* Initialize Mapper 1 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 120 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 121 | void Map1_Init() |
beaglescout007 | 0:3dac1f1bc9e0 | 122 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 123 | int nPage; |
beaglescout007 | 0:3dac1f1bc9e0 | 124 | |
beaglescout007 | 0:3dac1f1bc9e0 | 125 | /* Initialize Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 126 | MapperInit = Map1_Init; |
beaglescout007 | 0:3dac1f1bc9e0 | 127 | |
beaglescout007 | 0:3dac1f1bc9e0 | 128 | /* Write to Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 129 | MapperWrite = Map1_Write; |
beaglescout007 | 0:3dac1f1bc9e0 | 130 | |
beaglescout007 | 0:3dac1f1bc9e0 | 131 | /* Callback at VSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 132 | MapperVSync = Map0_VSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 133 | |
beaglescout007 | 0:3dac1f1bc9e0 | 134 | /* Callback at HSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 135 | MapperHSync = Map0_HSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 136 | |
beaglescout007 | 0:3dac1f1bc9e0 | 137 | pNesX_MemorySet( Map1_Reg, 0, sizeof Map1_Reg ); |
beaglescout007 | 0:3dac1f1bc9e0 | 138 | Map1_Cnt = Map1_Latch = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 139 | |
beaglescout007 | 0:3dac1f1bc9e0 | 140 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 141 | ROMBANK0 = ROMPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 142 | ROMBANK1 = ROMPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 143 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 144 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 145 | |
beaglescout007 | 0:3dac1f1bc9e0 | 146 | /* Set PPU VROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 147 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 148 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 149 | for ( nPage = 0; nPage < 8; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 150 | PPUBANK[ nPage ] = &VROM[ nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 151 | |
beaglescout007 | 0:3dac1f1bc9e0 | 152 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 153 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 154 | |
beaglescout007 | 0:3dac1f1bc9e0 | 155 | /* Set up wiring of the interrupt pin */ |
beaglescout007 | 0:3dac1f1bc9e0 | 156 | K6502_Set_Int_Wiring( 1, 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 157 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 158 | |
beaglescout007 | 0:3dac1f1bc9e0 | 159 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 160 | /* Mapper 1 Write Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 161 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 162 | void Map1_Write( WORD wAddr, BYTE byData ) |
beaglescout007 | 0:3dac1f1bc9e0 | 163 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 164 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 165 | * MMC1 |
beaglescout007 | 0:3dac1f1bc9e0 | 166 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 167 | |
beaglescout007 | 0:3dac1f1bc9e0 | 168 | int nReg; |
beaglescout007 | 0:3dac1f1bc9e0 | 169 | int nROMPos; |
beaglescout007 | 0:3dac1f1bc9e0 | 170 | int nBank; |
beaglescout007 | 0:3dac1f1bc9e0 | 171 | int nVBank; |
beaglescout007 | 0:3dac1f1bc9e0 | 172 | int nPage; |
beaglescout007 | 0:3dac1f1bc9e0 | 173 | |
beaglescout007 | 0:3dac1f1bc9e0 | 174 | nReg = ( wAddr >> 13 ) - 4; |
beaglescout007 | 0:3dac1f1bc9e0 | 175 | |
beaglescout007 | 0:3dac1f1bc9e0 | 176 | if ( byData & 0x80 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 177 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 178 | // Reset |
beaglescout007 | 0:3dac1f1bc9e0 | 179 | Map1_Reg[ 0 ] |= 0xc; |
beaglescout007 | 0:3dac1f1bc9e0 | 180 | Map1_Cnt = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 181 | Map1_Latch = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 182 | return; |
beaglescout007 | 0:3dac1f1bc9e0 | 183 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 184 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 185 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 186 | // Bit Data Set |
beaglescout007 | 0:3dac1f1bc9e0 | 187 | Map1_Latch |= ( ( byData & 1 ) << Map1_Cnt ); |
beaglescout007 | 0:3dac1f1bc9e0 | 188 | ++Map1_Cnt; |
beaglescout007 | 0:3dac1f1bc9e0 | 189 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 190 | |
beaglescout007 | 0:3dac1f1bc9e0 | 191 | if ( Map1_Cnt < 5 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 192 | return; |
beaglescout007 | 0:3dac1f1bc9e0 | 193 | |
beaglescout007 | 0:3dac1f1bc9e0 | 194 | // 5Bits Latched |
beaglescout007 | 0:3dac1f1bc9e0 | 195 | Map1_Reg[ nReg ] = ( nReg == 3 ) ? ( Map1_Latch & 0xf ) : Map1_Latch; |
beaglescout007 | 0:3dac1f1bc9e0 | 196 | Map1_Cnt = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 197 | Map1_Latch = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 198 | |
beaglescout007 | 0:3dac1f1bc9e0 | 199 | // Name Table Mirroring |
beaglescout007 | 0:3dac1f1bc9e0 | 200 | pNesX_Mirroring( ( Map1_Reg[ 0 ] & 3 ) ^ 3 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 201 | |
beaglescout007 | 0:3dac1f1bc9e0 | 202 | // Select Program ROM Bank |
beaglescout007 | 0:3dac1f1bc9e0 | 203 | |
beaglescout007 | 0:3dac1f1bc9e0 | 204 | // 256K ROM Position Selection |
beaglescout007 | 0:3dac1f1bc9e0 | 205 | nROMPos = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 206 | if ( NesHeader.byRomSize == 32 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 207 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 208 | /* 512K Program ROM */ |
beaglescout007 | 0:3dac1f1bc9e0 | 209 | // 0 (First 256K) or 32 (Second 256K) |
beaglescout007 | 0:3dac1f1bc9e0 | 210 | nROMPos = ( Map1_Reg[ 1 ] & 0x10 ) << 1; |
beaglescout007 | 0:3dac1f1bc9e0 | 211 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 212 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 213 | if ( NesHeader.byRomSize == 64 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 214 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 215 | /* 1024K Program ROM */ |
beaglescout007 | 0:3dac1f1bc9e0 | 216 | if ( Map1_Reg[ 0 ] & 0x10 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 217 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 218 | // Acknowledge 256K selection register 1 |
beaglescout007 | 0:3dac1f1bc9e0 | 219 | nROMPos = ( ( Map1_Reg[ 1 ] & 0x10 ) << 1 ) | |
beaglescout007 | 0:3dac1f1bc9e0 | 220 | ( ( Map1_Reg[ 2 ] & 0x10 ) << 2 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 221 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 222 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 223 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 224 | // Ignore 256K selection register 1 |
beaglescout007 | 0:3dac1f1bc9e0 | 225 | // 0 (First 256K) or 64 (Third 256K) |
beaglescout007 | 0:3dac1f1bc9e0 | 226 | nROMPos = ( Map1_Reg[ 1 ] & 0x10 ) << 2; |
beaglescout007 | 0:3dac1f1bc9e0 | 227 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 228 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 229 | |
beaglescout007 | 0:3dac1f1bc9e0 | 230 | // Set Program ROM Bank |
beaglescout007 | 0:3dac1f1bc9e0 | 231 | if ( !( Map1_Reg[ 0 ] & 8 ) ) |
beaglescout007 | 0:3dac1f1bc9e0 | 232 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 233 | // 32K ROM Bank |
beaglescout007 | 0:3dac1f1bc9e0 | 234 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 235 | nBank = ( ( Map1_Reg[ 3 ] << 2 ) + nROMPos ) % ( NesHeader.byRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 236 | |
beaglescout007 | 0:3dac1f1bc9e0 | 237 | ROMBANK0 = ROMPAGE( nBank ); |
beaglescout007 | 0:3dac1f1bc9e0 | 238 | ROMBANK1 = ROMPAGE( nBank + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 239 | ROMBANK2 = ROMPAGE( nBank + 2 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 240 | ROMBANK3 = ROMPAGE( nBank + 3 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 241 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 242 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 243 | if ( Map1_Reg[ 0 ] & 4 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 244 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 245 | // 16K ROM Bank at 0x8000 |
beaglescout007 | 0:3dac1f1bc9e0 | 246 | nBank = ( ( Map1_Reg[ 3 ] << 1 ) + nROMPos ) % ( NesHeader.byRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 247 | ROMBANK0 = ROMPAGE( nBank ); |
beaglescout007 | 0:3dac1f1bc9e0 | 248 | ROMBANK1 = ROMPAGE( nBank + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 249 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 250 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 251 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 252 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 253 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 254 | // 16K ROM Bank at 0xc000 |
beaglescout007 | 0:3dac1f1bc9e0 | 255 | nBank = ( ( Map1_Reg[ 3 ] << 1 ) + nROMPos ) % ( NesHeader.byRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 256 | ROMBANK0 = ROMPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 257 | ROMBANK1 = ROMPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 258 | ROMBANK2 = ROMPAGE( nBank ); |
beaglescout007 | 0:3dac1f1bc9e0 | 259 | ROMBANK3 = ROMPAGE( nBank + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 260 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 261 | |
beaglescout007 | 0:3dac1f1bc9e0 | 262 | // Select PPU VROM Bank |
beaglescout007 | 0:3dac1f1bc9e0 | 263 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 264 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 265 | if ( Map1_Reg[ 0 ] & 0x10 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 266 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 267 | // 4K VROM Switching |
beaglescout007 | 0:3dac1f1bc9e0 | 268 | nVBank = Map1_Reg[ 1 ] % ( NesHeader.byVRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 269 | for ( nPage = 0; nPage < 4; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 270 | PPUBANK[ nPage ] = &VROM[ nVBank * 0x1000 + nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 271 | |
beaglescout007 | 0:3dac1f1bc9e0 | 272 | nVBank = Map1_Reg[ 2 ] % ( NesHeader.byVRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 273 | for ( nPage = 0; nPage < 4; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 274 | PPUBANK[ nPage + 4 ] = &VROM[ nVBank * 0x1000 + nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 275 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 276 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 277 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 278 | // 8K VROM Switching |
beaglescout007 | 0:3dac1f1bc9e0 | 279 | nVBank = ( Map1_Reg[ 1 ] & 0xe ) % ( NesHeader.byVRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 280 | for ( nPage = 0; nPage < 8; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 281 | PPUBANK[ nPage ] = &VROM[ nVBank * 0x1000 + nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 282 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 283 | |
beaglescout007 | 0:3dac1f1bc9e0 | 284 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 285 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 286 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 287 | |
beaglescout007 | 0:3dac1f1bc9e0 | 288 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 289 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 290 | /* Mapper 2 (UNROM) */ |
beaglescout007 | 0:3dac1f1bc9e0 | 291 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 292 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 293 | |
beaglescout007 | 0:3dac1f1bc9e0 | 294 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 295 | /* Initialize Mapper 2 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 296 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 297 | void Map2_Init() |
beaglescout007 | 0:3dac1f1bc9e0 | 298 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 299 | /* Initialize Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 300 | MapperInit = Map2_Init; |
beaglescout007 | 0:3dac1f1bc9e0 | 301 | |
beaglescout007 | 0:3dac1f1bc9e0 | 302 | /* Write to Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 303 | MapperWrite = Map2_Write; |
beaglescout007 | 0:3dac1f1bc9e0 | 304 | |
beaglescout007 | 0:3dac1f1bc9e0 | 305 | /* Callback at VSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 306 | MapperVSync = Map0_VSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 307 | |
beaglescout007 | 0:3dac1f1bc9e0 | 308 | /* Callback at HSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 309 | MapperHSync = Map0_HSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 310 | |
beaglescout007 | 0:3dac1f1bc9e0 | 311 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 312 | ROMBANK0 = ROMPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 313 | ROMBANK1 = ROMPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 314 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 315 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 316 | |
beaglescout007 | 0:3dac1f1bc9e0 | 317 | /* Set up wiring of the interrupt pin */ |
beaglescout007 | 0:3dac1f1bc9e0 | 318 | K6502_Set_Int_Wiring( 1, 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 319 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 320 | |
beaglescout007 | 0:3dac1f1bc9e0 | 321 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 322 | /* Mapper 2 Write Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 323 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 324 | void Map2_Write( WORD wAddr, BYTE byData ) |
beaglescout007 | 0:3dac1f1bc9e0 | 325 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 326 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 327 | byData %= NesHeader.byRomSize; |
beaglescout007 | 0:3dac1f1bc9e0 | 328 | byData <<= 1; |
beaglescout007 | 0:3dac1f1bc9e0 | 329 | |
beaglescout007 | 0:3dac1f1bc9e0 | 330 | ROMBANK0 = ROMPAGE( byData ); |
beaglescout007 | 0:3dac1f1bc9e0 | 331 | ROMBANK1 = ROMPAGE( byData + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 332 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 333 | |
beaglescout007 | 0:3dac1f1bc9e0 | 334 | |
beaglescout007 | 0:3dac1f1bc9e0 | 335 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 336 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 337 | /* Mapper 3 (VROM Switch) */ |
beaglescout007 | 0:3dac1f1bc9e0 | 338 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 339 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 340 | |
beaglescout007 | 0:3dac1f1bc9e0 | 341 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 342 | /* Initialize Mapper 3 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 343 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 344 | void Map3_Init() |
beaglescout007 | 0:3dac1f1bc9e0 | 345 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 346 | int nPage; |
beaglescout007 | 0:3dac1f1bc9e0 | 347 | |
beaglescout007 | 0:3dac1f1bc9e0 | 348 | /* Initialize Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 349 | MapperInit = Map3_Init; |
beaglescout007 | 0:3dac1f1bc9e0 | 350 | |
beaglescout007 | 0:3dac1f1bc9e0 | 351 | /* Write to Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 352 | MapperWrite = Map3_Write; |
beaglescout007 | 0:3dac1f1bc9e0 | 353 | |
beaglescout007 | 0:3dac1f1bc9e0 | 354 | /* Callback at VSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 355 | MapperVSync = Map0_VSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 356 | |
beaglescout007 | 0:3dac1f1bc9e0 | 357 | /* Callback at HSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 358 | MapperHSync = Map0_HSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 359 | |
beaglescout007 | 0:3dac1f1bc9e0 | 360 | /* Set ROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 361 | ROMBANK0 = ROMPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 362 | ROMBANK1 = ROMPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 363 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 364 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 365 | |
beaglescout007 | 0:3dac1f1bc9e0 | 366 | /* Set PPU Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 367 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 368 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 369 | for ( nPage = 0; nPage < 8; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 370 | PPUBANK[ nPage ] = &VROM[ nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 371 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 372 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 373 | |
beaglescout007 | 0:3dac1f1bc9e0 | 374 | /* Set up wiring of the interrupt pin */ |
beaglescout007 | 0:3dac1f1bc9e0 | 375 | /* "DragonQuest" doesn't run if IRQ isn't made to occur in CLI */ |
beaglescout007 | 0:3dac1f1bc9e0 | 376 | K6502_Set_Int_Wiring( 1, 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 377 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 378 | |
beaglescout007 | 0:3dac1f1bc9e0 | 379 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 380 | /* Mapper 3 Write Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 381 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 382 | void Map3_Write( WORD wAddr, BYTE byData ) |
beaglescout007 | 0:3dac1f1bc9e0 | 383 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 384 | int nPage; |
beaglescout007 | 0:3dac1f1bc9e0 | 385 | |
beaglescout007 | 0:3dac1f1bc9e0 | 386 | /* Set PPU Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 387 | byData %= NesHeader.byVRomSize; |
beaglescout007 | 0:3dac1f1bc9e0 | 388 | for ( nPage = 0; nPage < 8; ++nPage ) |
beaglescout007 | 0:3dac1f1bc9e0 | 389 | PPUBANK[ nPage ] = &VROM[ byData * 0x2000 + nPage * 0x400 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 390 | |
beaglescout007 | 0:3dac1f1bc9e0 | 391 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 392 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 393 | |
beaglescout007 | 0:3dac1f1bc9e0 | 394 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 395 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 396 | /* Mapper 4 (MMC3) */ |
beaglescout007 | 0:3dac1f1bc9e0 | 397 | /* */ |
beaglescout007 | 0:3dac1f1bc9e0 | 398 | /*===================================================================*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 399 | |
beaglescout007 | 0:3dac1f1bc9e0 | 400 | BYTE Map4_VROM_Base; |
beaglescout007 | 0:3dac1f1bc9e0 | 401 | BYTE Map4_ROM_Base; |
beaglescout007 | 0:3dac1f1bc9e0 | 402 | BYTE Map4_Cmd; |
beaglescout007 | 0:3dac1f1bc9e0 | 403 | BYTE Map4_Banks_Reg[ 8 ]; |
beaglescout007 | 0:3dac1f1bc9e0 | 404 | BYTE Map4_IRQ_Cnt; |
beaglescout007 | 0:3dac1f1bc9e0 | 405 | BYTE Map4_IRQ_Set; |
beaglescout007 | 0:3dac1f1bc9e0 | 406 | BYTE Map4_IRQ_Enable; |
beaglescout007 | 0:3dac1f1bc9e0 | 407 | |
beaglescout007 | 0:3dac1f1bc9e0 | 408 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 409 | /* Initialize Mapper 4 */ |
beaglescout007 | 0:3dac1f1bc9e0 | 410 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 411 | void Map4_Init() |
beaglescout007 | 0:3dac1f1bc9e0 | 412 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 413 | /* Initialize Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 414 | MapperInit = Map4_Init; |
beaglescout007 | 0:3dac1f1bc9e0 | 415 | |
beaglescout007 | 0:3dac1f1bc9e0 | 416 | /* Write to Mapper */ |
beaglescout007 | 0:3dac1f1bc9e0 | 417 | MapperWrite = Map4_Write; |
beaglescout007 | 0:3dac1f1bc9e0 | 418 | |
beaglescout007 | 0:3dac1f1bc9e0 | 419 | /* Callback at VSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 420 | MapperVSync = Map4_VSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 421 | |
beaglescout007 | 0:3dac1f1bc9e0 | 422 | /* Callback at HSync */ |
beaglescout007 | 0:3dac1f1bc9e0 | 423 | MapperHSync = Map4_HSync; |
beaglescout007 | 0:3dac1f1bc9e0 | 424 | |
beaglescout007 | 0:3dac1f1bc9e0 | 425 | Map4_VROM_Base = Map4_ROM_Base = Map4_Cmd = Map4_IRQ_Cnt = Map4_IRQ_Set = Map4_IRQ_Enable = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 426 | |
beaglescout007 | 0:3dac1f1bc9e0 | 427 | Map4_Banks_Reg[ 0 ] = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 428 | Map4_Banks_Reg[ 1 ] = 2; |
beaglescout007 | 0:3dac1f1bc9e0 | 429 | Map4_Banks_Reg[ 2 ] = 4; |
beaglescout007 | 0:3dac1f1bc9e0 | 430 | Map4_Banks_Reg[ 3 ] = 5; |
beaglescout007 | 0:3dac1f1bc9e0 | 431 | Map4_Banks_Reg[ 4 ] = 6; |
beaglescout007 | 0:3dac1f1bc9e0 | 432 | Map4_Banks_Reg[ 5 ] = 7; |
beaglescout007 | 0:3dac1f1bc9e0 | 433 | Map4_Banks_Reg[ 6 ] = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 434 | Map4_Banks_Reg[ 7 ] = 1; |
beaglescout007 | 0:3dac1f1bc9e0 | 435 | |
beaglescout007 | 0:3dac1f1bc9e0 | 436 | Map4_Write( 0x8000, 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 437 | Map4_Write( 0x8001, 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 438 | |
beaglescout007 | 0:3dac1f1bc9e0 | 439 | /* Set up wiring of the interrupt pin */ |
beaglescout007 | 0:3dac1f1bc9e0 | 440 | K6502_Set_Int_Wiring( 1, 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 441 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 442 | |
beaglescout007 | 0:3dac1f1bc9e0 | 443 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 444 | /* Mapper 4 Write Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 445 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 446 | void Map4_Write( WORD wAddr, BYTE byData ) |
beaglescout007 | 0:3dac1f1bc9e0 | 447 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 448 | WORD wMapAddr; |
beaglescout007 | 0:3dac1f1bc9e0 | 449 | |
beaglescout007 | 0:3dac1f1bc9e0 | 450 | wMapAddr = wAddr & 0xe001; |
beaglescout007 | 0:3dac1f1bc9e0 | 451 | |
beaglescout007 | 0:3dac1f1bc9e0 | 452 | switch ( wMapAddr ) |
beaglescout007 | 0:3dac1f1bc9e0 | 453 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 454 | case 0xa000: |
beaglescout007 | 0:3dac1f1bc9e0 | 455 | // Name Table Mirroring |
beaglescout007 | 0:3dac1f1bc9e0 | 456 | pNesX_Mirroring( ~byData & 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 457 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 458 | |
beaglescout007 | 0:3dac1f1bc9e0 | 459 | case 0xa001: |
beaglescout007 | 0:3dac1f1bc9e0 | 460 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 461 | |
beaglescout007 | 0:3dac1f1bc9e0 | 462 | case 0xc000: |
beaglescout007 | 0:3dac1f1bc9e0 | 463 | Map4_IRQ_Cnt = byData; |
beaglescout007 | 0:3dac1f1bc9e0 | 464 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 465 | |
beaglescout007 | 0:3dac1f1bc9e0 | 466 | case 0xc001: |
beaglescout007 | 0:3dac1f1bc9e0 | 467 | Map4_IRQ_Set = byData; |
beaglescout007 | 0:3dac1f1bc9e0 | 468 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 469 | |
beaglescout007 | 0:3dac1f1bc9e0 | 470 | case 0xe000: |
beaglescout007 | 0:3dac1f1bc9e0 | 471 | Map4_IRQ_Cnt = Map4_IRQ_Set; |
beaglescout007 | 0:3dac1f1bc9e0 | 472 | Map4_IRQ_Enable = 0; |
beaglescout007 | 0:3dac1f1bc9e0 | 473 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 474 | |
beaglescout007 | 0:3dac1f1bc9e0 | 475 | case 0xe001: |
beaglescout007 | 0:3dac1f1bc9e0 | 476 | if ( Map4_IRQ_Cnt > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 477 | Map4_IRQ_Enable = 1; |
beaglescout007 | 0:3dac1f1bc9e0 | 478 | break; |
beaglescout007 | 0:3dac1f1bc9e0 | 479 | |
beaglescout007 | 0:3dac1f1bc9e0 | 480 | default: |
beaglescout007 | 0:3dac1f1bc9e0 | 481 | if ( wMapAddr == 0x8000 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 482 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 483 | Map4_VROM_Base = byData >> 7; |
beaglescout007 | 0:3dac1f1bc9e0 | 484 | Map4_ROM_Base = ( byData >> 6 ) & 1; |
beaglescout007 | 0:3dac1f1bc9e0 | 485 | Map4_Cmd = byData & 7; |
beaglescout007 | 0:3dac1f1bc9e0 | 486 | return; |
beaglescout007 | 0:3dac1f1bc9e0 | 487 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 488 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 489 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 490 | if ( Map4_Cmd >= 6 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 491 | byData %= ( NesHeader.byRomSize << 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 492 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 493 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 494 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 495 | if ( Map4_Cmd < 2 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 496 | byData = ( byData & 0xfe ) % ( NesHeader.byVRomSize << 3 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 497 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 498 | if ( Map4_Cmd < 6 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 499 | byData %= ( NesHeader.byVRomSize << 3 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 500 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 501 | |
beaglescout007 | 0:3dac1f1bc9e0 | 502 | Map4_Banks_Reg[ Map4_Cmd ] = byData; |
beaglescout007 | 0:3dac1f1bc9e0 | 503 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 504 | |
beaglescout007 | 0:3dac1f1bc9e0 | 505 | /* Set VROM Banks */ |
beaglescout007 | 0:3dac1f1bc9e0 | 506 | if ( NesHeader.byVRomSize > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 507 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 508 | if ( Map4_VROM_Base ) |
beaglescout007 | 0:3dac1f1bc9e0 | 509 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 510 | PPUBANK[ 0 ] = VROMPAGE( Map4_Banks_Reg[ 2 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 511 | PPUBANK[ 1 ] = VROMPAGE( Map4_Banks_Reg[ 3 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 512 | PPUBANK[ 2 ] = VROMPAGE( Map4_Banks_Reg[ 4 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 513 | PPUBANK[ 3 ] = VROMPAGE( Map4_Banks_Reg[ 5 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 514 | PPUBANK[ 4 ] = VROMPAGE( Map4_Banks_Reg[ 0 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 515 | PPUBANK[ 5 ] = VROMPAGE( Map4_Banks_Reg[ 0 ] + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 516 | PPUBANK[ 6 ] = VROMPAGE( Map4_Banks_Reg[ 1 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 517 | PPUBANK[ 7 ] = VROMPAGE( Map4_Banks_Reg[ 1 ] + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 518 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 519 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 520 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 521 | PPUBANK[ 0 ] = VROMPAGE( Map4_Banks_Reg[ 0 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 522 | PPUBANK[ 1 ] = VROMPAGE( Map4_Banks_Reg[ 0 ] + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 523 | PPUBANK[ 2 ] = VROMPAGE( Map4_Banks_Reg[ 1 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 524 | PPUBANK[ 3 ] = VROMPAGE( Map4_Banks_Reg[ 1 ] + 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 525 | PPUBANK[ 4 ] = VROMPAGE( Map4_Banks_Reg[ 2 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 526 | PPUBANK[ 5 ] = VROMPAGE( Map4_Banks_Reg[ 3 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 527 | PPUBANK[ 6 ] = VROMPAGE( Map4_Banks_Reg[ 4 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 528 | PPUBANK[ 7 ] = VROMPAGE( Map4_Banks_Reg[ 5 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 529 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 530 | |
beaglescout007 | 0:3dac1f1bc9e0 | 531 | pNesX_SetupChr(); |
beaglescout007 | 0:3dac1f1bc9e0 | 532 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 533 | |
beaglescout007 | 0:3dac1f1bc9e0 | 534 | if ( Map4_ROM_Base ) |
beaglescout007 | 0:3dac1f1bc9e0 | 535 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 536 | ROMBANK0 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 537 | ROMBANK1 = ROMPAGE( Map4_Banks_Reg[ 7 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 538 | ROMBANK2 = ROMPAGE( Map4_Banks_Reg[ 6 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 539 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 540 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 541 | else |
beaglescout007 | 0:3dac1f1bc9e0 | 542 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 543 | ROMBANK0 = ROMPAGE( Map4_Banks_Reg[ 6 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 544 | ROMBANK1 = ROMPAGE( Map4_Banks_Reg[ 7 ] ); |
beaglescout007 | 0:3dac1f1bc9e0 | 545 | ROMBANK2 = ROMLASTPAGE( 1 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 546 | ROMBANK3 = ROMLASTPAGE( 0 ); |
beaglescout007 | 0:3dac1f1bc9e0 | 547 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 548 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 549 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 550 | |
beaglescout007 | 0:3dac1f1bc9e0 | 551 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 552 | /* Mapper 4 V-Sync Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 553 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 554 | void Map4_VSync() |
beaglescout007 | 0:3dac1f1bc9e0 | 555 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 556 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 557 | * Callback at VSync |
beaglescout007 | 0:3dac1f1bc9e0 | 558 | * |
beaglescout007 | 0:3dac1f1bc9e0 | 559 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 560 | Map4_IRQ_Cnt = Map4_IRQ_Set; |
beaglescout007 | 0:3dac1f1bc9e0 | 561 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 562 | |
beaglescout007 | 0:3dac1f1bc9e0 | 563 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 564 | /* Mapper 4 H-Sync Function */ |
beaglescout007 | 0:3dac1f1bc9e0 | 565 | /*-------------------------------------------------------------------*/ |
beaglescout007 | 0:3dac1f1bc9e0 | 566 | void Map4_HSync() |
beaglescout007 | 0:3dac1f1bc9e0 | 567 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 568 | /* |
beaglescout007 | 0:3dac1f1bc9e0 | 569 | * Callback at HSync |
beaglescout007 | 0:3dac1f1bc9e0 | 570 | * |
beaglescout007 | 0:3dac1f1bc9e0 | 571 | */ |
beaglescout007 | 0:3dac1f1bc9e0 | 572 | |
beaglescout007 | 0:3dac1f1bc9e0 | 573 | if ( Map4_IRQ_Enable && |
beaglescout007 | 0:3dac1f1bc9e0 | 574 | PPU_Scanline >= SCAN_ON_SCREEN_START && PPU_Scanline < SCAN_BOTTOM_OFF_SCREEN_START && |
beaglescout007 | 0:3dac1f1bc9e0 | 575 | //PPU_ScanTable[ PPU_Scanline ] == SCAN_ON_SCREEN && |
beaglescout007 | 0:3dac1f1bc9e0 | 576 | ( PPU_R1 & ( R1_SHOW_SCR | R1_SHOW_SP ) ) == ( R1_SHOW_SCR | R1_SHOW_SP ) && |
beaglescout007 | 0:3dac1f1bc9e0 | 577 | Map4_IRQ_Cnt > 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 578 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 579 | --Map4_IRQ_Cnt; |
beaglescout007 | 0:3dac1f1bc9e0 | 580 | if ( Map4_IRQ_Cnt == 0 ) |
beaglescout007 | 0:3dac1f1bc9e0 | 581 | { |
beaglescout007 | 0:3dac1f1bc9e0 | 582 | Map4_IRQ_Cnt = Map4_IRQ_Set; |
beaglescout007 | 0:3dac1f1bc9e0 | 583 | IRQ_REQ; |
beaglescout007 | 0:3dac1f1bc9e0 | 584 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 585 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 586 | } |
beaglescout007 | 0:3dac1f1bc9e0 | 587 | |
beaglescout007 | 0:3dac1f1bc9e0 | 588 | |
beaglescout007 | 0:3dac1f1bc9e0 | 589 |