Diff: pNesX.h

Revision:

0:3dac1f1bc9e0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pNesX.h	Sun Apr 03 07:45:29 2016 +0000
@@ -0,0 +1,285 @@
+/*===================================================================*/
+/*                                                                   */
+/*  pNesX.h : NES Emulator for PSX                                   */
+/*                                                                   */
+/*  1999/11/03  Racoon  New preparation                              */
+/*                                                                   */
+/*===================================================================*/
+
+#ifndef PNESX_H_INCLUDED
+#define PNESX_H_INCLUDED
+
+/*-------------------------------------------------------------------*/
+/*  Include files                                                    */
+/*-------------------------------------------------------------------*/
+
+#include "pNesX_Types.h"
+
+/*-------------------------------------------------------------------*/
+/*  NES resources                                                    */
+/*-------------------------------------------------------------------*/
+
+#define RAM_SIZE     0x2000
+#define SRAM_SIZE    0x2000
+#define PPURAM_SIZE  0x4000
+#define SPRRAM_SIZE  256
+
+/* RAM */
+extern BYTE RAM[];
+
+/* SRAM */
+extern BYTE SRAM[];
+
+/* ROM */
+extern BYTE *ROM;
+
+/* ROM BANK ( 8Kb * 4 ) */
+extern BYTE *ROMBANK0;
+extern BYTE *ROMBANK1;
+extern BYTE *ROMBANK2;
+extern BYTE *ROMBANK3;
+
+/*-------------------------------------------------------------------*/
+/*  PPU resources                                                    */
+/*-------------------------------------------------------------------*/
+
+/* PPU RAM */
+extern BYTE PPURAM[];
+
+/* VROM */
+extern BYTE *VROM;
+
+/* PPU BANK ( 1Kb * 16 ) */
+extern BYTE *PPUBANK[];
+
+#define NAME_TABLE0  8
+#define NAME_TABLE1  9
+#define NAME_TABLE2  10
+#define NAME_TABLE3  11
+
+#define NAME_TABLE_V_MASK 2
+#define NAME_TABLE_H_MASK 1
+
+/* Sprite RAM */
+extern BYTE SPRRAM[];
+
+#define SPR_Y    0
+#define SPR_CHR  1
+#define SPR_ATTR 2
+#define SPR_X    3
+#define SPR_ATTR_COLOR  0x3
+#define SPR_ATTR_V_FLIP 0x80
+#define SPR_ATTR_H_FLIP 0x40
+#define SPR_ATTR_PRI    0x20
+
+/* PPU Register */
+extern BYTE PPU_R0;
+extern BYTE PPU_R1;
+extern BYTE PPU_R2;
+extern BYTE PPU_R3;
+extern BYTE PPU_R7;
+
+extern BYTE PPU_Scr_V;
+extern BYTE PPU_Scr_V_Next;
+extern BYTE PPU_Scr_V_Byte;
+extern BYTE PPU_Scr_V_Byte_Next;
+extern BYTE PPU_Scr_V_Bit;
+extern BYTE PPU_Scr_V_Bit_Next;
+
+extern BYTE PPU_Scr_H;
+extern BYTE PPU_Scr_H_Next;
+extern BYTE PPU_Scr_H_Byte;
+extern BYTE PPU_Scr_H_Byte_Next;
+extern BYTE PPU_Scr_H_Bit;
+extern BYTE PPU_Scr_H_Bit_Next;
+
+extern BYTE PPU_Latch_Flag;
+extern WORD PPU_Addr;
+extern WORD PPU_Increment;
+
+#define R0_NMI_VB      0x80
+#define R0_NMI_SP      0x40
+#define R0_SP_SIZE     0x20
+#define R0_BG_ADDR     0x10
+#define R0_SP_ADDR     0x08
+#define R0_INC_ADDR    0x04
+#define R0_NAME_ADDR   0x03
+
+#define R1_BACKCOLOR   0xe0
+#define R1_SHOW_SP     0x10
+#define R1_SHOW_SCR    0x08
+#define R1_CLIP_SP     0x04
+#define R1_CLIP_BG     0x02
+#define R1_MONOCHROME  0x01
+
+#define R2_IN_VBLANK   0x80
+#define R2_HIT_SP      0x40
+#define R2_MAX_SP      0x20
+#define R2_WRITE_FLAG  0x10
+
+#define SCAN_TOP_OFF_SCREEN_START       0 
+#define SCAN_ON_SCREEN_START            8
+#define SCAN_BOTTOM_OFF_SCREEN_START  232
+#define SCAN_POSTRENDER_START          240
+#define SCAN_VBLANK_START             245
+#define SCAN_VBLANK_END               261
+
+#define SCAN_APU_CLK1   45      // 240Hz
+#define SCAN_APU_CLK2   110     // 240Hz 120Hz
+#define SCAN_APU_CLK3   176     // 240Hz
+#define SCAN_APU_CLK4   241     // 240Hz 120Hz 60Hz
+
+/* Current Scanline */
+extern WORD PPU_Scanline;
+
+/* Scanline Table */
+extern BYTE PPU_ScanTable[];
+
+/* Name Table Bank */
+extern BYTE PPU_NameTableBank;
+
+/* BG Base Address */
+extern BYTE *PPU_BG_Base;
+
+/* Sprite Base Address */
+extern BYTE *PPU_SP_Base;
+
+/* Sprite Height */
+extern WORD PPU_SP_Height;
+
+/* NES display size */
+#define NES_DISP_WIDTH      256
+#define NES_DISP_HEIGHT     224
+
+/*-------------------------------------------------------------------*/
+/*  Display and Others resouces                                      */
+/*-------------------------------------------------------------------*/
+
+/* Frame Skip */
+extern WORD FrameSkip;
+extern WORD FrameCnt;
+
+//extern WORD DoubleFrame[ 2 ][ NES_DISP_WIDTH * NES_DISP_HEIGHT ];
+//extern WORD DoubleFrame[ 2 ][ NES_DISP_WIDTH ];
+extern WORD *WorkFrame;
+extern WORD WorkFrameIdx;
+
+extern BYTE ChrBuf[];
+
+extern BYTE ChrBufUpdate;
+
+extern WORD PalTable[];
+
+/*-------------------------------------------------------------------*/
+/*  APU and Pad resources                                            */
+/*-------------------------------------------------------------------*/
+
+extern BYTE APU_Reg[];
+
+extern DWORD PAD1_Latch;
+extern DWORD PAD2_Latch;
+extern DWORD PAD_System;
+extern DWORD PAD1_Bit;
+extern DWORD PAD2_Bit;
+
+#define PAD_SYS_QUIT   1
+#define PAD_SYS_OK     2
+#define PAD_SYS_CANCEL 4
+#define PAD_SYS_UP     8
+#define PAD_SYS_DOWN   0x10
+#define PAD_SYS_LEFT   0x20
+#define PAD_SYS_RIGHT  0x40
+
+#define PAD_PUSH(a,b)  ( ( (a) & (b) ) != 0 )
+
+/*-------------------------------------------------------------------*/
+/*  Mapper Function                                                  */
+/*-------------------------------------------------------------------*/
+
+/* Initialize Mapper */
+extern void (*MapperInit)();
+/* Write to Mapper */
+extern void (*MapperWrite)( WORD wAddr, BYTE byData );
+/* Callback at VSync */
+extern void (*MapperVSync)();
+/* Callback at HSync */
+extern void (*MapperHSync)();
+
+/*-------------------------------------------------------------------*/
+/*  ROM information                                                  */
+/*-------------------------------------------------------------------*/
+
+/* .nes File Header */
+struct NesHeader_tag
+{
+  BYTE byID[ 4 ];
+  BYTE byRomSize;
+  BYTE byVRomSize;
+  BYTE byInfo1;
+  BYTE byInfo2;
+  BYTE byReserve[ 8 ];
+};
+
+/* .nes File Header */
+extern struct NesHeader_tag NesHeader;
+
+/* Mapper No. */
+extern BYTE MapperNo;
+
+/* Other */
+extern BYTE ROM_Mirroring;
+extern BYTE ROM_SRAM;
+extern BYTE ROM_Trainer;
+extern BYTE ROM_FourScr;
+
+/*-------------------------------------------------------------------*/
+/*  Function prototypes                                              */
+/*-------------------------------------------------------------------*/
+
+/* Initialize pNesX */
+void pNesX_Init();
+
+/* Completion treatment */
+void pNesX_Fin();
+
+/* Load a cassette */
+int pNesX_Load( const char *pszFileName );
+
+/* Reset pNesX */
+int pNesX_Reset();
+
+/* Initialize PPU */
+void pNesX_SetupPPU();
+
+/* Set up a Mirroring of Name Table */
+void pNesX_Mirroring( int nType );
+
+/* The main loop of pNesX */ 
+void pNesX_Main();
+
+/* The loop of emulation */
+void pNesX_Cycle();
+
+/* A function in H-Sync */
+int pNesX_HSync();
+
+/* Render a scanline */
+void pNesX_DrawLine();
+
+/* Get a position of scanline hits sprite #0 */
+void pNesX_GetSprHitY();
+
+/* Develop character data */
+void pNesX_SetupChr();
+
+/* Apu */
+void ApuInit();
+void ApuWrite(WORD wAddr, BYTE byData);
+BYTE ApuRead(WORD wAddr);
+void pNesX_ApuClk_240Hz();
+void pNesX_ApuClk_120Hz();
+void pNesX_ApuClk_60Hz();
+
+#endif /* !PNESX_H_INCLUDED */
+
+