AxibugEmuOnline/References/virtuanessrc097-master/NES/PPU.h

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<EFBFBD><EFBFBD>//////////////////////////////////////////////////////////////////////////
// //
// NES PPU core //
// Norix //
// written 2001/02/22 //
// last modify ----/--/-- //
//////////////////////////////////////////////////////////////////////////
#ifndef __PPU_INCLUDED__
#define __PPU_INCLUDED__
#include "typedef.h"
#include "macro.h"
// class prototype
class NES;
// PPU Control Register #1 PPU #0
#define PPU_VBLANK_BIT 0x80
#define PPU_SPHIT_BIT 0x40 // U<EFBFBD>F0<EFBFBD>
#define PPU_SP16_BIT 0x20
#define PPU_BGTBL_BIT 0x10
#define PPU_SPTBL_BIT 0x08
#define PPU_INC32_BIT 0x04
#define PPU_NAMETBL_BIT 0x03
// PPU Control Register #2 PPU #1
#define PPU_BGCOLOR_BIT 0xE0
#define PPU_SPDISP_BIT 0x10
#define PPU_BGDISP_BIT 0x08
#define PPU_SPCLIP_BIT 0x04
#define PPU_BGCLIP_BIT 0x02
#define PPU_COLORMODE_BIT 0x01
// PPU Status Register PPU #2
#define PPU_VBLANK_FLAG 0x80
#define PPU_SPHIT_FLAG 0x40
#define PPU_SPMAX_FLAG 0x20
#define PPU_WENABLE_FLAG 0x10
// SPRITE Attribute
#define SP_VMIRROR_BIT 0x80
#define SP_HMIRROR_BIT 0x40
#define SP_PRIORITY_BIT 0x20
#define SP_COLOR_BIT 0x03
class PPU
{
public:
PPU( NES* parent );
virtual ~PPU();
enum { SCREEN_WIDTH = 256+16, SCREEN_HEIGHT = 240 };
void Reset();
BYTE Read ( WORD addr );
void Write( WORD addr, BYTE data );
void DMA( BYTE data );
void VBlankStart();
void VBlankEnd();
void FrameStart();
void FrameEnd();
void SetRenderScanline( INT scanline );
void ScanlineStart();
void ScanlineNext();
WORD GetPPUADDR() { return loopy_v; }
WORD GetTILEY() { return loopy_y; }
// Scanline base render
void Scanline( INT scanline, BOOL bMax, BOOL bLeftClip );
void DummyScanline( INT scanline );
// For mapper
void SetExtLatchMode( BOOL bMode ) { bExtLatch = bMode; }
void SetChrLatchMode( BOOL bMode ) { bChrLatch = bMode; }
void SetExtNameTableMode( BOOL bMode ) { bExtNameTable = bMode; }
void SetExtMonoMode( BOOL bMode ) { bExtMono = bMode; }
BOOL GetExtMonoMode() { return bExtMono; }
BOOL IsDispON() { return PPUREG[1]&(PPU_BGDISP_BIT|PPU_SPDISP_BIT); }
BOOL IsBGON() { return PPUREG[1]&PPU_BGDISP_BIT; }
BOOL IsSPON() { return PPUREG[1]&PPU_SPDISP_BIT; }
BYTE GetBGCOLOR() { return (PPUREG[1]&PPU_BGCOLOR_BIT)>>5; }
BOOL IsBGCLIP() { return PPUREG[1]&PPU_BGCLIP_BIT; }
BOOL IsSPCLIP() { return PPUREG[1]&PPU_SPCLIP_BIT; }
BOOL IsMONOCROME() { return PPUREG[1]&PPU_COLORMODE_BIT; }
BOOL IsVBLANK() { return PPUREG[2]&PPU_VBLANK_FLAG; }
BOOL IsSPHIT() { return PPUREG[2]&PPU_SPHIT_FLAG; }
BOOL IsSPMAX() { return PPUREG[2]&PPU_SPMAX_FLAG; }
BOOL IsPPUWE() { return PPUREG[2]&PPU_WENABLE_FLAG; }
BOOL IsSprite0( INT scanline );
void SetScreenPtr( LPBYTE lpScn, LPBYTE lpMode ) { lpScreen = lpScn; lpColormode = lpMode; }
LPBYTE GetScreenPtr() { return lpScreen; }
INT GetScanlineNo() { return ScanlineNo; }
// For VS-Unisystem
void SetVSMode( BOOL bMode ) { bVSMode = bMode; }
void SetVSSecurity( BYTE data ) { VSSecurityData = data; }
void SetVSColorMap( INT nColorMap ) { nVSColorMap = nColorMap; }
protected:
NES* nes;
BOOL bExtLatch; // For MMC5
BOOL bChrLatch; // For MMC2/MMC4
BOOL bExtNameTable; // For Super Monkey no Dai Bouken
BOOL bExtMono; // For Final Fantasy
WORD loopy_y;
WORD loopy_shift;
LPBYTE lpScreen;
LPBYTE lpScanline;
INT ScanlineNo;
LPBYTE lpColormode;
typedef struct tagSPRITE {
BYTE y;
BYTE tile;
BYTE attr;
BYTE x;
} SPRITE, *LPSPRITE;
// Reversed bits
BYTE Bit2Rev[256];
// For VS-Unisystem
BOOL bVSMode;
BYTE VSSecurityData;
INT nVSColorMap;
static BYTE VSColorMap[5][64];
private:
};
#endif // !__PPU_INCLUDED__