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metaforce/NESEmulator/ppu.c

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/*
* Copyright (C) 2017 FIX94
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
/*
* URDE modifications to generate RGBA8 framebuffer rather than BGR565
*/
#include <stdio.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include "fixNES/mapper.h"
#include "fixNES/ppu.h"
//certain optimizations were taken from nestopias ppu code,
//thanks to the people from there for all that
//sprite byte 2
#define PPU_SPRITE_PRIO (1<<5)
#define PPU_SPRITE_FLIP_X (1<<6)
#define PPU_SPRITE_FLIP_Y (1<<7)
//2000
#define PPU_INC_AMOUNT (1<<2)
#define PPU_SPRITE_ADDR (1<<3)
#define PPU_BACKGROUND_ADDR (1<<4)
#define PPU_SPRITE_8_16 (1<<5)
#define PPU_FLAG_NMI (1<<7)
//2001
#define PPU_GRAY (1<<0)
#define PPU_BG_8PX (1<<1)
#define PPU_SPRITE_8PX (1<<2)
#define PPU_BG_ENABLE (1<<3)
#define PPU_SPRITE_ENABLE (1<<4)
//2002
#define PPU_FLAG_OVERFLOW (1<<5)
#define PPU_FLAG_SPRITEZERO (1<<6)
#define PPU_FLAG_VBLANK (1<<7)
#define DOTS 341
#define VISIBLE_DOTS 256
#define VISIBLE_LINES 240
#define PPU_VRAM_HORIZONTAL_MASK 0x41F
#define PPU_VRAM_VERTICAL_MASK (~PPU_VRAM_HORIZONTAL_MASK)
#define PPU_DEBUG_ULTRA 0
#define PPU_DEBUG_VSYNC 0
//set or used externally
bool ppu4Screen = false;
bool ppu816Sprite = false;
bool ppuInFrame = false;
bool ppuScanlineDone = false;
uint8_t ppuDrawnXTile = 0;
//from main.c
extern uint32_t textureImage[0xF000];
extern bool nesPause;
extern bool ppuDebugPauseFrame;
extern bool doOverscan;
static uint8_t ppuDoSprites(uint8_t color, uint16_t dot);
// BMF Final 2
static const uint8_t PPU_Pal[192] =
{
0x52, 0x52, 0x52, 0x00, 0x00, 0x80, 0x08, 0x00, 0x8A, 0x2C, 0x00, 0x7E, 0x4A, 0x00, 0x4E, 0x50, 0x00, 0x06, 0x44, 0x00, 0x00, 0x26, 0x08, 0x00,
0x0A, 0x20, 0x00, 0x00, 0x2E, 0x00, 0x00, 0x32, 0x00, 0x00, 0x26, 0x0A, 0x00, 0x1C, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xA4, 0xA4, 0xA4, 0x00, 0x38, 0xCE, 0x34, 0x16, 0xEC, 0x5E, 0x04, 0xDC, 0x8C, 0x00, 0xB0, 0x9A, 0x00, 0x4C, 0x90, 0x18, 0x00, 0x70, 0x36, 0x00,
0x4C, 0x54, 0x00, 0x0E, 0x6C, 0x00, 0x00, 0x74, 0x00, 0x00, 0x6C, 0x2C, 0x00, 0x5E, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0x4C, 0x9C, 0xFF, 0x7C, 0x78, 0xFF, 0xA6, 0x64, 0xFF, 0xDA, 0x5A, 0xFF, 0xF0, 0x54, 0xC0, 0xF0, 0x6A, 0x56, 0xD6, 0x86, 0x10,
0xBA, 0xA4, 0x00, 0x76, 0xC0, 0x00, 0x46, 0xCC, 0x1A, 0x2E, 0xC8, 0x66, 0x34, 0xC2, 0xBE, 0x3A, 0x3A, 0x3A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xB6, 0xDA, 0xFF, 0xC8, 0xCA, 0xFF, 0xDA, 0xC2, 0xFF, 0xF0, 0xBE, 0xFF, 0xFC, 0xBC, 0xEE, 0xFA, 0xC2, 0xC0, 0xF2, 0xCC, 0xA2,
0xE6, 0xDA, 0x92, 0xCC, 0xE6, 0x8E, 0xB8, 0xEE, 0xA2, 0xAE, 0xEA, 0xBE, 0xAE, 0xE8, 0xE2, 0xB0, 0xB0, 0xB0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
} ;
static const uint8_t ppuRunCyclesNTSC[5] = { 3, 3, 3, 3, 3 };
static const uint8_t ppuRunCyclesPAL[5] = { 3, 3, 3, 3, 4 };
static const uint8_t ppuOddArrNTSC[2] = { 0, 1 };
static const uint8_t ppuOddArrPAL[2] = { 0, 0 };
static struct
{
const uint8_t *Pal;
const uint8_t *RunCycles;
const uint8_t *OddArr;
uint32_t BGRLUT[0x200];
uint8_t TILELUT[0x400][4];
uint16_t PALRAM2[0x20];
uint16_t NameTbl[4];
uint16_t NameTblBak[4];
uint8_t VRAM[0x1000];
uint8_t OAM[0x100];
uint8_t OAM2[0x20];
uint8_t PALRAM[0x20];
uint8_t Sprites[8][12];
uint8_t BGTiles[16];
uint8_t Reg[8];
uint8_t Count;
uint8_t OddNum;
uint16_t curLine;
uint16_t LinesTotal;
uint16_t PreRenderLine;
uint16_t curDot;
uint16_t VramAddr;
uint16_t TmpVramAddr;
uint8_t ToDraw;
uint8_t VramReadBuf;
uint8_t OAMpos;
uint8_t OAM2pos;
uint8_t OAMcpPos;
uint8_t OAMzSpritePos;
uint8_t FineXScroll;
uint8_t SpriteOAM2Pos;
uint8_t SpriteTilePos;
uint8_t BGRegA;
uint8_t BGRegB;
uint8_t BGAttribReg;
uint8_t BGIndex;
uint8_t BytesCopied;
uint8_t lastVal;
uint8_t CurSpriteLn;
uint8_t CurSpriteIndex;
uint8_t CurSpriteByte2;
uint8_t CurSpriteByte3;
uint8_t TmpOAMVal;
bool NextHasZSprite;
bool FrameDone;
bool TmpWrite;
bool NMIallowed;
bool NMITriggered;
bool VBlankFlagCleared;
bool VBlankClearCycle;
bool CurNMIStat;
bool OddFrame;
bool ReadReg2;
bool OAMoverflow;
bool SearchY;
bool LineOverflow;
bool DoOverscan;
bool BGEnable;
bool SprEnable;
} ppu;
extern bool nesPAL;
void ppuInit()
{
memset(ppu.PALRAM2,0,0x40);
memset(ppu.NameTbl,0,8);
memset(ppu.NameTblBak,0,8);
memset(ppu.VRAM,0,0x1000);
memset(ppu.OAM,0,0x100);
memset(ppu.OAM2,0xFF,0x20);
memset(ppu.PALRAM,0,0x20);
int32_t i;
for(i = 0; i < 8; i++)
memset(ppu.Sprites[i],0,12);
memset(ppu.BGTiles,0,0x10);
memset(ppu.Reg,0,8);
ppu.Pal = PPU_Pal;
//ppuCycles = 0;
//start out being in vblank
ppu.Reg[2] |= PPU_FLAG_VBLANK;
ppu.LinesTotal = nesPAL ? 312 : 262;
ppu.PreRenderLine = ppu.LinesTotal - 1;
ppu.curLine = ppu.LinesTotal - 11;
ppu.curDot = 0;
ppu.VramAddr = 0;
ppu.TmpVramAddr = 0;
ppu.ToDraw = 0;
ppu.VramReadBuf = 0;
ppu.OAMpos = 0;
ppu.OAM2pos = 0;
ppu.OAMcpPos = 0;
ppu.OAMzSpritePos = 0;
ppu.FineXScroll = 0;
ppu.SpriteOAM2Pos = 0;
ppu.SpriteTilePos = 0;
ppu.BGRegA = 0;
ppu.BGRegB = 0;
ppu.BGAttribReg = 0;
ppu.BGIndex = 0;
ppu.BytesCopied = 0;
ppu.lastVal = 0;
ppu.CurSpriteLn = 0;
ppu.CurSpriteIndex = 0;
ppu.CurSpriteByte2 = 0;
ppu.CurSpriteByte3 = 0;
ppu.TmpOAMVal = 0xFF;
ppu.NextHasZSprite = false;
ppu.FrameDone = false;
ppu.TmpWrite = false;
ppu.NMIallowed = false;
ppu.NMITriggered = false;
ppu.VBlankFlagCleared = false;
ppu.VBlankClearCycle = false;
ppu.CurNMIStat = false;
ppu.OddFrame = false;
ppu.ReadReg2 = false;
ppu.OAMoverflow = false;
ppu.SearchY = false;
ppu.LineOverflow = false;
ppu.DoOverscan = false;
ppu.BGEnable = false;
ppu.SprEnable = false;
//generate full BGR LUT
uint8_t rtint = nesPAL ? (1<<6) : (1<<5);
uint8_t gtint = nesPAL ? (1<<5) : (1<<6);
uint8_t btint = (1<<7);
for(i = 0; i < 0x200; i++)
{
uint8_t palpos = (i&0x3F)*3;
uint8_t r = ppu.Pal[palpos];
uint8_t g = ppu.Pal[palpos+1];
uint8_t b = ppu.Pal[palpos+2];
if((i & 0xF) <= 0xD)
{
//reduce red
if((i>>1) & btint) r = (uint8_t)(((float)r)*0.75f);
if((i>>1) & gtint) r = (uint8_t)(((float)r)*0.75f);
//reduce green
if((i>>1) & rtint) g = (uint8_t)(((float)g)*0.75f);
if((i>>1) & btint) g = (uint8_t)(((float)g)*0.75f);
//reduce blue
if((i>>1) & rtint) b = (uint8_t)(((float)b)*0.75f);
if((i>>1) & gtint) b = (uint8_t)(((float)b)*0.75f);
}
//save new color into LUT
ppu.BGRLUT[i] =
(0xFFu<<24) //Alpha
| (b<<16) //Blue
| (g<<8) //Green
| r; //Red
}
//tile LUT from nestopia
for (i = 0; i < 0x400; ++i)
{
ppu.TILELUT[i][0] = (i & 0xC0) ? (i >> 6 & 0xC) | (i >> 6 & 0x3) : 0;
ppu.TILELUT[i][1] = (i & 0x30) ? (i >> 6 & 0xC) | (i >> 4 & 0x3) : 0;
ppu.TILELUT[i][2] = (i & 0x0C) ? (i >> 6 & 0xC) | (i >> 2 & 0x3) : 0;
ppu.TILELUT[i][3] = (i & 0x03) ? (i >> 6 & 0xC) | (i >> 0 & 0x3) : 0;
}
ppu.Count = 0;
ppu.RunCycles = nesPAL ? ppuRunCyclesPAL : ppuRunCyclesNTSC;
ppu.OddNum = 0;
ppu.OddArr = nesPAL ? ppuOddArrPAL : ppuOddArrNTSC;
}
extern uint8_t m5_exMode;
extern uint8_t m5exGetAttrib(uint16_t addr);
static inline uint16_t ppuGetVramTbl(uint16_t tblStart)
{
return ppu.NameTbl[(tblStart>>10)&3];
}
extern bool nesEmuNSFPlayback;
//tile load from nestopia
static void loadTiles()
{
uint8_t* src[] =
{
ppu.TILELUT[ppu.BGRegA | (ppu.BGAttribReg & 3) << 8],
ppu.TILELUT[ppu.BGRegB | (ppu.BGAttribReg & 3) << 8]
};
uint8_t* dst = ppu.BGTiles+ppu.BGIndex;
ppu.BGIndex ^= 8;
dst[0] = src[0][0];
dst[1] = src[1][0];
dst[2] = src[0][1];
dst[3] = src[1][1];
dst[4] = src[0][2];
dst[5] = src[1][2];
dst[6] = src[0][3];
dst[7] = src[1][3];
}
static void grabNextSpriteTilesP1()
{
ppu.TmpOAMVal = ppu.OAM2[ppu.SpriteOAM2Pos++];
ppu.CurSpriteLn = ppu.TmpOAMVal;
}
static void grabNextSpriteTilesP2()
{
ppu.TmpOAMVal = ppu.OAM2[ppu.SpriteOAM2Pos++];
ppu.CurSpriteIndex = ppu.TmpOAMVal;
}
static void grabNextSpriteTilesP3()
{
ppu.TmpOAMVal = ppu.OAM2[ppu.SpriteOAM2Pos++];
ppu.CurSpriteByte2 = ppu.TmpOAMVal;
}
static void grabNextSpriteTilesP4()
{
ppu.TmpOAMVal = ppu.OAM2[ppu.SpriteOAM2Pos++];
ppu.CurSpriteByte3 = ppu.TmpOAMVal;
}
static void grabNextSpriteTilesP5(uint16_t line)
{
uint8_t cSprLn = ppu.CurSpriteLn, cSprInd = ppu.CurSpriteIndex, cSprB2 = ppu.CurSpriteByte2;
uint8_t cSpriteAdd = 0; //used to select which 8 by 16 tile
bool spr816 = ppu.Reg[0] & PPU_SPRITE_8_16;
uint8_t cSpriteY = (line - cSprLn)&(spr816 ? 15 : 7);
if(cSpriteY > 7) //8 by 16 select
{
cSpriteAdd = 16;
cSpriteY &= 7;
}
uint16_t chrROMSpriteAdd = 0;
if(spr816)
{
chrROMSpriteAdd = ((cSprInd & 1) << 12);
cSprInd &= ~1;
}
else if(ppu.Reg[0] & PPU_SPRITE_ADDR)
chrROMSpriteAdd = 0x1000;
if(cSprB2 & PPU_SPRITE_FLIP_Y)
{
cSpriteY ^= 7;
if(spr816)
cSpriteAdd ^= 16; //8 by 16 select
}
/* write processed values into internal draw buffer */
mapperChrMode = 1;
uint8_t p0 = mapperChrGet8(((chrROMSpriteAdd+(cSprInd<<4)+cSpriteY+cSpriteAdd)&0xFFF) | chrROMSpriteAdd);
uint8_t p1 = mapperChrGet8(((chrROMSpriteAdd+(cSprInd<<4)+cSpriteY+8+cSpriteAdd)&0xFFF) | chrROMSpriteAdd);
if ((p0 | p1) && (cSprLn < VISIBLE_LINES)) //sprite contains data and is on a valid line, so process
{
//pixels
uint8_t sprTilePos = ppu.SpriteTilePos;
uint8_t a = (cSprB2 & PPU_SPRITE_FLIP_X) ? 7 : 0;
uint16_t p = (p0 >> 1 & 0x0055) | (p1 << 0 & 0x00AA) | (p0 << 8 & 0x5500) | (p1 << 9 & 0xAA00);
ppu.Sprites[sprTilePos][( a^=6 )] = ( p ) & 0x3;
ppu.Sprites[sprTilePos][( a^=2 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=6 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=2 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=7 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=2 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=6 )] = ( p >>= 2 ) & 0x3;
ppu.Sprites[sprTilePos][( a^=2 )] = ( p >>= 2 );
//x position
ppu.Sprites[sprTilePos][8] = ppu.CurSpriteByte3;
//is zero sprite (compare to 4 because OAM2 was just read, 4 is next position)
ppu.Sprites[sprTilePos][9] = (ppu.SpriteOAM2Pos == 4 && ppu.NextHasZSprite) ? 0x3 : 0x0;
//priority
ppu.Sprites[sprTilePos][10] = (cSprB2 & PPU_SPRITE_PRIO) ? 0x3 : 0x0;
//palette
ppu.Sprites[sprTilePos][11] = (cSprB2&3)<<2 | 0x10;
//increase pos
ppu.SpriteTilePos = sprTilePos+1;
}
}
static void updateBGTileAddress()
{
if((ppu.VramAddr & 0x1F) == 0x1F)
ppu.VramAddr ^= 0x41F;
else
ppu.VramAddr++;
}
static void updateBGHoriAddress()
{
ppu.VramAddr = (ppu.VramAddr & (~PPU_VRAM_HORIZONTAL_MASK)) | (ppu.TmpVramAddr & PPU_VRAM_HORIZONTAL_MASK);
}
static void updateBGVertAddress()
{
ppu.VramAddr = (ppu.VramAddr & (~PPU_VRAM_VERTICAL_MASK)) | (ppu.TmpVramAddr & PPU_VRAM_VERTICAL_MASK);
}
static void updateBGYAddress()
{
/* update Y position for writes */
if((ppu.VramAddr & 0x7000) != (7<<12))
ppu.VramAddr += (1<<12);
else switch(ppu.VramAddr & 0x3E0)
{
default: ppu.VramAddr = (ppu.VramAddr & 0xFFF) + (1 << 5); break;
case (29<<5): ppu.VramAddr ^= 0x800;
case (31<<5): ppu.VramAddr &= 0xC1F; break;
}
}
static void updateBGRegsA(uint16_t dot)
{
/* MMC5 Scroll Related */
if(dot == 320)
ppuDrawnXTile = 0;
else
ppuDrawnXTile++;
if(m5_exMode == 1)
{
/* MMC5 Ex Mode 1 has different Attribute for every Tile */
ppu.BGAttribReg = m5exGetAttrib(ppu.VramAddr);
}
else
{
uint16_t cPpuTbl = ppuGetVramTbl(ppu.VramAddr);
/* Select new BG Background Attribute */
uint8_t cAttrib = ((ppu.VramAddr>>4)&0x38) | ((ppu.VramAddr>>2)&7);
uint16_t attributeAddr = cPpuTbl | (0x3C0 | cAttrib);
ppu.BGAttribReg = mapperVramGet8(attributeAddr) >> ((ppu.VramAddr & 0x2) | (ppu.VramAddr >> 4 & 0x4));
}
}
static void updateBGRegsB()
{
uint16_t cPpuTbl = ppuGetVramTbl(ppu.VramAddr);
/* Select new BG Tiles */
uint16_t chrROMBG = (ppu.Reg[0] & PPU_BACKGROUND_ADDR) ? 0x1000 : 0;
uint16_t workAddr = cPpuTbl | (ppu.VramAddr & 0x3FF);
uint8_t curBGtileReg = mapperVramGet8(workAddr);
uint8_t curTileY = (ppu.VramAddr>>12)&7;
uint16_t curBGTile = chrROMBG+(curBGtileReg<<4)+curTileY;
mapperChrMode = 0;
uint8_t tmp = mapperChrGet8(curBGTile);
ppu.BGRegB = tmp >> 0 & 0x55; ppu.BGRegA = tmp >> 1 & 0x55;
tmp = mapperChrGet8(curBGTile+8);
ppu.BGRegA |= tmp << 0 & 0xAA; ppu.BGRegB |= tmp << 1 & 0xAA;
}
static void spriteEvalInit()
{
ppu.OAMzSpritePos = ppu.OAMpos;
//OAM Bug in 2C02
if(ppu.OAMpos & 0xF8)
memcpy(ppu.OAM,ppu.OAM + (ppu.OAMpos & 0xF8), 8);
}
static void spriteEvalA()
{
ppu.TmpOAMVal = ppu.OAM[(ppu.OAMpos+ppu.OAMcpPos)&0xFF];
//printf("%i %i %i %02x\n", ppu.OAMpos, ppu.OAMcpPos, (ppu.OAMpos+ppu.OAMcpPos)&0xFF, ppu.TmpOAMVal);
}
static void spriteEvalB(uint16_t line)
{
if(!ppu.OAMoverflow)
{
if(ppu.SearchY)
{
uint8_t cSpriteLn = ppu.TmpOAMVal;
uint8_t cSpriteAdd = (ppu.Reg[0] & PPU_SPRITE_8_16) ? 16 : 8;
if(cSpriteLn <= line && (cSpriteLn+cSpriteAdd) > line)
{
ppu.SearchY = false;
if(ppu.OAM2pos == 0 && ppu.OAMpos == ppu.OAMzSpritePos)
ppu.NextHasZSprite = true;
if(ppu.OAM2pos != 0x20)
{
ppu.OAM2[ppu.OAM2pos+ppu.OAMcpPos] = ppu.TmpOAMVal;
//printf("Copying sprite with line %i at line %i pos oam %i oam2 %i\n", cSpriteLn, ppu.curLine, ppu.OAMpos, ppu.OAM2pos);
}
else
{
//if(!(PPU_Reg[2] & PPU_FLAG_OVERFLOW) && !ppu.SpriteOverflow)
// printf("Overflow with line %i at line %i pos oam %i oam2 %i\n", cSpriteLn, ppu.curLine, ppu.OAMpos, ppu.OAM2pos);
ppu.Reg[2] |= PPU_FLAG_OVERFLOW;
ppu.LineOverflow = true;
}
ppu.BytesCopied++;
if(ppu.OAMcpPos < 3)
ppu.OAMcpPos++;
else
{
ppu.OAMcpPos = 0;
ppu.OAMpos += 4;
if(ppu.OAMpos == 0)
ppu.OAMoverflow = true;
}
}
else //no matching sprite, increase N
{
ppu.OAMpos += 4;
if(ppu.OAM2pos == 0x20 && !ppu.LineOverflow) /* nes sprite overflow bug */
{
if(ppu.OAMcpPos < 3)
ppu.OAMcpPos++;
else
ppu.OAMcpPos = 0;
}
if(ppu.OAMpos == 0)
ppu.OAMoverflow = true;
}
}
else
{
if(ppu.OAM2pos != 0x20)
ppu.OAM2[ppu.OAM2pos+ppu.OAMcpPos] = ppu.TmpOAMVal;
if(ppu.OAMcpPos < 3)
ppu.OAMcpPos++;
else
{
ppu.OAMcpPos = 0;
ppu.OAMpos += 4;
if(ppu.OAMpos == 0)
ppu.OAMoverflow = true;
}
if(ppu.BytesCopied < 3) //we still have to read from this
ppu.BytesCopied++;
else //Back to next sprite
{
if(ppu.OAM2pos != 0x20)
ppu.OAM2pos += 4;
ppu.BytesCopied = 0;
ppu.OAMcpPos = 0;
ppu.SearchY = true;
if(ppu.LineOverflow) //overflow sprite copied, end
ppu.OAMoverflow = true;
}
}
}
else
ppu.OAMpos += 4;
if(ppu.OAM2pos == 0x20)
ppu.TmpOAMVal = ppu.OAM2[0];
}
static void clearSpriteWorkRegs()
{
ppu.OAMcpPos = 0;
ppu.BytesCopied = 0;
ppu.OAMoverflow = false;
ppu.SearchY = true;
ppu.LineOverflow = false;
}
static void resetOAMPos()
{
ppu.OAMpos = 0;
}
static void ppuCheckLine241(uint16_t dot)
{
/* VBlank start at first dot after post-render line */
/* Though results are better when starting it a bit later */
if(dot == 2)
{
ppu.NMITriggered = false;
if(!ppu.ReadReg2)
ppu.Reg[2] |= PPU_FLAG_VBLANK;
#if PPU_DEBUG_VSYNC
printf("PPU Start VBlank\n");
#endif
}
else if(dot == 4 && ppu.Reg[2] & PPU_FLAG_VBLANK)
ppu.NMIallowed = true;
ppu.ReadReg2 = false;
}
static void ppuLastDot(uint16_t *dot, uint16_t *line, bool curPicOutStat)
{
*dot = 0;
(*line)++;
if(*line == 241) /* done drawing this frame */
ppu.FrameDone = true;
else if(*line == ppu.LinesTotal) /* Wrap back down after pre-render line */
*line = 0;
ppu.curLine = *line;
/* For MMC5 Scanline Detect */
if((*line <= VISIBLE_LINES) && curPicOutStat)
{
ppuInFrame = true;
ppuScanlineDone = true;
}
else
ppuInFrame = false;
ppu.DoOverscan = (doOverscan && (*line < 8 || *line >= 232));
ppu.NextHasZSprite = false; //reset
ppu.OAMzSpritePos = 0; // reset
ppu.SpriteOAM2Pos = 0; //reset
ppu.ToDraw = ppu.SpriteTilePos;
ppu.SpriteTilePos = 0; //reset
ppu.OAM2pos = 0; //reset
ppu.TmpOAMVal = 0xFF;
memset(ppu.OAM2, ppu.TmpOAMVal, 0x20);
//printf("Line done\n");
}
void ppuCycle()
{
//try and make the pic out stat, cur dot and cur line local variables to reduce the time it gets pulled from bss!
size_t drawPos;
uint16_t dot = ppu.curDot, line = ppu.curLine, cPalIdx;
uint8_t curCol;
//these 2 stats are set by cpu, no need to have them in loop
ppu.CurNMIStat = !!(ppu.Reg[0] & PPU_FLAG_NMI);
bool picOutStat = (ppu.Reg[1] & (PPU_BG_ENABLE | PPU_SPRITE_ENABLE)) != 0;
ppu.VBlankClearCycle = false;
//get value of how often ppu has to run
uint8_t ppuLoop = ppu.RunCycles[ppu.Count];
ppu.Count = (ppu.Count+1)%5;
if(nesEmuNSFPlayback)
{
while(ppuLoop--)
{
if(line == ppu.PreRenderLine)
{
/* Mini-switch for basic vblank handle */
switch(dot)
{
case 0: /* VBlank ends at first dot of the pre-render line */
ppu.Reg[2] &= ~(PPU_FLAG_SPRITEZERO | PPU_FLAG_OVERFLOW);
goto add_dot_nsf;
case 2: /* Though results are better when clearing it a bit later */
#if PPU_DEBUG_VSYNC
printf("PPU End VBlank\n");
#endif
ppu.Reg[2] &= ~(PPU_FLAG_VBLANK);
goto add_dot_nsf;
case 7:
ppu.NMIallowed = false;
goto add_dot_nsf;
case 339:
ppu.OddFrame = ppu.OddArr[ppu.OddNum^=1];
if(ppu.OddFrame && (ppu.Reg[1] & PPU_BG_ENABLE))
{
ppuLastDot(&dot,&line,picOutStat);
break;
}
goto add_dot_nsf;
case 340:
ppuLastDot(&dot,&line,picOutStat);
break;
default:
add_dot_nsf:
dot++;
break;
}
}
else
{
if(line == 241)
ppuCheckLine241(dot);
if(dot == 340)
ppuLastDot(&dot,&line,picOutStat);
else
dot++;
}
}
}
else
{
while(ppuLoop--)
{
if(line == ppu.PreRenderLine || line < VISIBLE_LINES)
{
switch(dot)
{
case 0: /* VBlank ends at first dot of the pre-render line */
if(line == ppu.PreRenderLine)
{
ppu.Reg[2] &= ~(PPU_FLAG_SPRITEZERO | PPU_FLAG_OVERFLOW);
goto add_dot;
}
//else if line < VISIBLE_LINES
ppu.BGEnable = (ppu.Reg[1] & PPU_BG_8PX) && (ppu.Reg[1] & PPU_BG_ENABLE);
ppu.SprEnable = (ppu.Reg[1] & PPU_SPRITE_8PX) && (ppu.Reg[1] & PPU_SPRITE_ENABLE);
goto do_render_pixel;
case 2: /* Though results are better when clearing it a bit later */
if(line == ppu.PreRenderLine)
{
#if PPU_DEBUG_VSYNC
printf("PPU End VBlank\n");
#endif
ppu.Reg[2] &= ~(PPU_FLAG_VBLANK);
goto add_dot;
}
//else if line < VISIBLE_LINES
goto do_render_pixel;
case 7:
if(line == ppu.PreRenderLine)
{
ppu.NMIallowed = false;
goto add_dot;
}
//else if line < VISIBLE_LINES
goto do_render_pixel;
case 1: case 3: case 5:
case 6: case 9: case 10:
case 11: case 13: case 14: case 15:
case 17: case 18: case 19: case 21:
case 22: case 23: case 25: case 26:
case 27: case 29: case 30: case 31:
case 33: case 34: case 35: case 37:
case 38: case 39: case 41: case 42:
case 43: case 45: case 46: case 47:
case 49: case 50: case 51: case 53:
case 54: case 55: case 57: case 58:
case 59: case 61: case 62: case 63:
if(line < VISIBLE_LINES) //needs a lot of optimization, takes a lot of cpu atm
{
do_render_pixel:
/* Grab color to render from BG and Sprites */
curCol = ppu.BGEnable ? ppu.BGTiles[(dot + ppu.FineXScroll) & 15] : 0;
if(ppu.SprEnable) curCol = ppuDoSprites(curCol, dot);
/* Draw current dot on screen */
drawPos = (dot)+(line<<8);
if(ppu.DoOverscan) /* Draw clipped area as black */
textureImage[drawPos] = 0xFF000000;
else
{
if(picOutStat) //use color from bg or sprite input
cPalIdx = ppu.PALRAM2[curCol&0x1F];
else if((ppu.VramAddr & 0x3F00) == 0x3F00) //bg and sprite disabled but address within PALRAM
cPalIdx = ppu.PALRAM2[ppu.VramAddr&0x1F];
else //bg and sprite disabled and address not within PALRAM
cPalIdx = ppu.PALRAM[0];
textureImage[drawPos] = ppu.BGRLUT[cPalIdx];
}
}
goto add_dot;
case 4: case 12: case 20: case 28:
case 36: case 44: case 52: case 60:
updateBGRegsB();
if(line < VISIBLE_LINES)
goto do_render_pixel;
goto add_dot;
case 8:
if(picOutStat) updateBGTileAddress();
loadTiles(); updateBGRegsA(dot);
if(line < VISIBLE_LINES)
{
ppu.BGEnable = (ppu.Reg[1] & PPU_BG_ENABLE);
ppu.SprEnable = (ppu.Reg[1] & PPU_SPRITE_ENABLE);
goto do_render_pixel;
}
goto add_dot;
case 16: case 24: case 32:
case 40: case 48: case 56:
if(picOutStat) updateBGTileAddress();
loadTiles(); updateBGRegsA(dot);
if(line < VISIBLE_LINES)
goto do_render_pixel;
goto add_dot;
case 64:
if(picOutStat) updateBGTileAddress();
loadTiles(); updateBGRegsA(dot);
if(line < VISIBLE_LINES)
{
if(picOutStat)
{
spriteEvalInit();
spriteEvalA();
}
goto do_render_pixel;
}
goto add_dot;
case 65: case 67: case 69: case 71:
case 73: case 75: case 77: case 79:
case 81: case 83: case 85: case 87:
case 89: case 91: case 93: case 95:
case 97: case 99: case 101: case 103:
case 105: case 107: case 109: case 111:
case 113: case 115: case 117: case 119:
case 121: case 123: case 125: case 127:
case 129: case 131: case 133: case 135:
case 137: case 139: case 141: case 143:
case 145: case 147: case 149: case 151:
case 153: case 155: case 157: case 159:
case 161: case 163: case 165: case 167:
case 169: case 171: case 173: case 175:
case 177: case 179: case 181: case 183:
case 185: case 187: case 189: case 191:
case 193: case 195: case 197: case 199:
case 201: case 203: case 205: case 207:
case 209: case 211: case 213: case 215:
case 217: case 219: case 221: case 223:
case 225: case 227: case 229: case 231:
case 233: case 235: case 237: case 239:
case 241: case 243: case 245: case 247:
case 249: case 253: case 255:
do_sprite_eval_b:
if(line < VISIBLE_LINES)
{
if(picOutStat) spriteEvalB(line);
goto do_render_pixel;
}
goto add_dot;
case 66: case 70: case 74: case 78:
case 82: case 86: case 90: case 94:
case 98: case 102: case 106: case 110:
case 114: case 118: case 122: case 126:
case 130: case 134: case 138: case 142:
case 146: case 150: case 154: case 158:
case 162: case 166: case 170: case 174:
case 178: case 182: case 186: case 190:
case 194: case 198: case 202: case 206:
case 210: case 214: case 218: case 222:
case 226: case 230: case 234: case 238:
case 242: case 246: case 250: case 254:
do_sprite_eval_a:
if(line < VISIBLE_LINES)
{
if(picOutStat) spriteEvalA();
goto do_render_pixel;
}
goto add_dot;
case 68: case 76: case 84: case 92:
case 100: case 108: case 116: case 124:
case 132: case 140: case 148: case 156:
case 164: case 172: case 180: case 188:
case 196: case 204: case 212: case 220:
case 228: case 236: case 244: case 252:
updateBGRegsB();
goto do_sprite_eval_a;
case 72: case 80: case 88: case 96:
case 104: case 112: case 120: case 128:
case 136: case 144: case 152: case 160:
case 168: case 176: case 184: case 192:
case 200: case 208: case 216: case 224:
case 232: case 240: case 248:
if(picOutStat) updateBGTileAddress();
loadTiles(); updateBGRegsA(dot);
goto do_sprite_eval_a;
case 251:
if(picOutStat) updateBGYAddress();
goto do_sprite_eval_b;
case 256:
if(line < VISIBLE_LINES)
clearSpriteWorkRegs();
loadTiles(); updateBGRegsA(dot);
if(picOutStat)
{
updateBGTileAddress();
goto do_spritetiles_P1;
}
goto add_dot;
case 257:
if(picOutStat)
{
updateBGHoriAddress();
goto do_spritetiles_P2;
}
goto add_dot;
case 258: case 266: case 274: case 306:
case 314:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
do_spritetiles_P3:
grabNextSpriteTilesP3();
}
goto add_dot;
case 259: case 267: case 275: case 307:
case 315:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
do_spritetiles_P4:
grabNextSpriteTilesP4();
}
goto add_dot;
case 260: case 268: case 276: case 308:
case 316:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
do_spritetiles_P5:
grabNextSpriteTilesP5(line);
}
goto add_dot;
case 261: case 262: case 263: case 269:
case 270: case 271: case 277: case 278:
case 279: case 309: case 310: case 311:
case 317: case 318: case 321: case 322:
case 323: case 325: case 326: case 327:
case 329: case 330: case 331: case 333:
case 334: case 335: case 337: case 338:
if(picOutStat && line < VISIBLE_LINES) resetOAMPos();
goto add_dot;
case 264: case 272: case 312:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
do_spritetiles_P1:
grabNextSpriteTilesP1();
}
goto add_dot;
case 265: case 273: case 305: case 313:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
do_spritetiles_P2:
grabNextSpriteTilesP2();
}
goto add_dot;
case 280: case 288: case 296: case 304:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
grabNextSpriteTilesP1();
}
goto add_dot;
case 281: case 289: case 297:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
grabNextSpriteTilesP2();
}
goto add_dot;
case 282: case 290: case 298:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
goto do_spritetiles_P3;
}
goto add_dot;
case 283: case 291: case 299:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
goto do_spritetiles_P4;
}
goto add_dot;
case 284: case 292: case 300:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
goto do_spritetiles_P5;
}
goto add_dot;
case 285: case 286: case 287: case 293:
case 294: case 295: case 301: case 302:
case 303:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
else if(line == ppu.PreRenderLine) updateBGVertAddress();
}
goto add_dot;
case 319:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
ppu.TmpOAMVal = ppu.OAM2[0];
}
goto add_dot;
case 320:
if(picOutStat && line < VISIBLE_LINES) resetOAMPos();
updateBGRegsA(dot);
goto add_dot;
case 324:
case 332:
if(picOutStat && line < VISIBLE_LINES) resetOAMPos();
updateBGRegsB();
goto add_dot;
case 328:
ppu.BGIndex = 0;
case 336:
if(picOutStat)
{
if(line < VISIBLE_LINES) resetOAMPos();
updateBGTileAddress();
}
loadTiles(); updateBGRegsA(dot);
goto add_dot;
case 339:
if(line == ppu.PreRenderLine)
{
ppu.OddFrame = ppu.OddArr[ppu.OddNum^=1];
if(ppu.OddFrame && (ppu.Reg[1] & PPU_BG_ENABLE))
{
ppuLastDot(&dot,&line,picOutStat);
break;
}
}
else if(picOutStat && line < VISIBLE_LINES)
resetOAMPos();
goto add_dot;
case 340:
if(picOutStat && line < VISIBLE_LINES) resetOAMPos();
updateBGRegsB();
ppuLastDot(&dot,&line,picOutStat);
break;
default:
add_dot:
dot++;
break;
}
}
else
{
if(line == 241)
ppuCheckLine241(dot);
if(dot == 340)
ppuLastDot(&dot,&line,picOutStat);
else
dot++;
}
}
}
ppu.curDot = dot;
}
void ppuPrintcurLineDot()
{
printf("%i %i %02x\n", ppu.curLine, ppu.curDot, ppu.OAMpos);
}
static uint8_t ppuDoSprites(uint8_t color, uint16_t dot)
{
uint8_t i;
for(i = 0; i < ppu.ToDraw; i++)
{
uint16_t x = dot - ppu.Sprites[i][8];
if (x > 7) continue;
//required pixel
x = ppu.Sprites[i][x];
if (x)
{
if ((color & ppu.Sprites[i][9]) && dot < 255)
{
ppu.Reg[2] |= PPU_FLAG_SPRITEZERO;
#if PPU_DEBUG_ULTRA
printf("Zero sprite hit at x %i y %i cSpriteDot %i "
"table %04x color %02x sprCol %02x\n", dot, ppu.curLine, cSpriteDot, ppuGetVramTbl((ppu.Reg[0]&3)<<10), color, sprCol);
#endif
//if(ppu.curLine < 224)
// ppuDebugPauseFrame = true;
}
if (!(color & ppu.Sprites[i][10]))
color = ppu.Sprites[i][11] | x;
break;
}
}
return color;
}
bool ppuDrawDone()
{
if(ppu.FrameDone)
{
//printf("%i\n",ppuCycles);
//ppuCycles = 0;
ppu.FrameDone = false;
return true;
}
return false;
}
void ppuSet8(uint8_t reg, uint8_t val)
{
ppu.lastVal = val;
if(reg == 0)
{
ppu.Reg[0] = val;
ppu.TmpVramAddr &= ~0xC00;
ppu.TmpVramAddr |= ((val&3)<<10);
ppu816Sprite = (val & PPU_SPRITE_8_16) != 0;
//printf("%d %d %d\n", (PPU_Reg[0] & PPU_BACKGROUND_ADDR) != 0, (PPU_Reg[0] & PPU_SPRITE_ADDR) != 0, (PPU_Reg[0] & PPU_SPRITE_8_16) != 0);
}
else if(reg == 1)
{
if((ppu.Reg[1]^val)&(PPU_GRAY|0xE0))
{
uint8_t i;
for(i = 0; i < 0x20; i++)
ppu.PALRAM2[i] = (ppu.PALRAM[i]&((val&PPU_GRAY)?0x30:0x3F))|((val&0xE0)<<1);
}
ppu.BGEnable = (ppu.curDot >= 8 || (val & PPU_BG_8PX)) && (val & PPU_BG_ENABLE);
ppu.SprEnable = (ppu.curDot >= 8 || (val & PPU_SPRITE_8PX)) && (val & PPU_SPRITE_ENABLE);
ppu.Reg[1] = val;
}
else if(reg == 3)
{
#if PPU_DEBUG_ULTRA
printf("ppu.OAMpos at line %i dot %i was %02x set to %02x\n", ppu.curLine, ppu.curDot, ppu.OAMpos, val);
#endif
ppu.OAMpos = val;
}
else if(reg == 4)
{
#if PPU_DEBUG_ULTRA
printf("Setting OAM at line %i dot %i addr %02x to %02x\n", ppu.curLine, ppu.curDot, ppu.OAMpos, val);
#endif
ppu.OAM[ppu.OAMpos++] = val;
}
else if(reg == 5)
{
#if PPU_DEBUG_ULTRA
printf("ppuScrollWrite (%d) %02x pc %04x\n", ppu.TmpWrite, val, cpuGetPc());
#endif
if(!ppu.TmpWrite)
{
ppu.TmpWrite = true;
ppu.FineXScroll = val&7;
ppu.TmpVramAddr &= ~0x1F;
ppu.TmpVramAddr |= ((val>>3)&0x1F);
}
else
{
ppu.TmpWrite = false;
ppu.TmpVramAddr &= ~0x73E0;
ppu.TmpVramAddr |= ((val&7)<<12) | ((val>>3)<<5);
}
}
else if(reg == 6)
{
#if PPU_DEBUG_ULTRA
printf("ppu.VramAddrWrite (%d) %02x pc %04x\n", ppu.TmpWrite, val, cpuGetPc());
#endif
if(!ppu.TmpWrite)
{
ppu.TmpWrite = true;
ppu.TmpVramAddr &= 0xFF;
ppu.TmpVramAddr |= ((val&0x3F)<<8);
}
else
{
ppu.TmpWrite = false;
ppu.TmpVramAddr &= ~0xFF;
ppu.TmpVramAddr |= val;
ppu.VramAddr = ppu.TmpVramAddr;
//For MMC3 IRQ (Shadow Read)
if((ppu.VramAddr&0x3FFF) < 0x2000)
mapperChrGet8(ppu.VramAddr&0x3FFF);
}
}
else if(reg == 7)
{
uint16_t writeAddr = (ppu.VramAddr & 0x3FFF);
if(writeAddr < 0x2000)
{
mapperChrSet8(writeAddr, val);
}
else if(writeAddr < 0x3F00)
{
uint16_t workAddr = ppuGetVramTbl(writeAddr) | (writeAddr & 0x3FF);
//printf("ppuVRAMwrite %04x %02x\n", workAddr, val);
mapperVramSet8(workAddr, val);
}
else
{
uint8_t palRamAddr = (writeAddr&0x1F);
if((palRamAddr&3) == 0)
{
ppu.PALRAM[palRamAddr^0x10] = val;
ppu.PALRAM2[palRamAddr^0x10] = (val&((ppu.Reg[1]&PPU_GRAY)?0x30:0x3F))|((ppu.Reg[1]&0xE0)<<1);
}
ppu.PALRAM[palRamAddr] = val;
ppu.PALRAM2[palRamAddr] = (val&((ppu.Reg[1]&PPU_GRAY)?0x30:0x3F))|((ppu.Reg[1]&0xE0)<<1);
}
ppu.VramAddr += (ppu.Reg[0] & PPU_INC_AMOUNT) ? 32 : 1;
//For MMC3 IRQ (Shadow Read)
if((ppu.VramAddr&0x3FFF) < 0x2000)
mapperChrGet8(ppu.VramAddr&0x3FFF);
}
else if(reg != 2)
{
ppu.Reg[reg] = val;
//printf("ppuSet8 odd %d ppu.curDot %i ppu.curLine %i %04x %02x\n", ppu.OddFrame, ppu.curDot, ppu.curLine, reg, val);
}
}
uint8_t ppuGet8(uint8_t reg)
{
uint8_t ret = ppu.lastVal;
if(reg == 2)
{
ret = ppu.Reg[reg];
ppu.Reg[reg] &= ~PPU_FLAG_VBLANK;
if(ret & PPU_FLAG_VBLANK)
{
ppu.VBlankFlagCleared = true;
ppu.VBlankClearCycle = true;
}
ppu.TmpWrite = false;
ppu.ReadReg2 = true;
}
else if(reg == 4)
{
if(ppu.Reg[2] & PPU_FLAG_VBLANK || (ppu.Reg[1] & (PPU_BG_ENABLE | PPU_SPRITE_ENABLE)) == 0)
ret = ppu.OAM[ppu.OAMpos];
else
ret = ppu.TmpOAMVal;
//printf("Cycle %i line %i val %02x\n", ppu.curDot, ppu.curLine, ret);
}
else if(reg == 7)
{
uint16_t writeAddr = (ppu.VramAddr & 0x3FFF);
if(writeAddr < 0x2000)
{
ret = ppu.VramReadBuf;
mapperChrMode = 2;
ppu.VramReadBuf = mapperChrGet8(writeAddr);
}
else if(writeAddr < 0x3F00)
{
ret = ppu.VramReadBuf;
uint16_t workAddr = ppuGetVramTbl(writeAddr) | (writeAddr & 0x3FF);
ppu.VramReadBuf = mapperVramGet8(workAddr);
//printf("ppuVRAMread pc %04x addr %04x ret %02x\n", cpuGetPc(), workAddr, ret);
}
else
{
uint8_t palRamAddr = (writeAddr&0x1F);
if((palRamAddr&3) == 0)
palRamAddr &= ~0x10;
ret = ppu.PALRAM[palRamAddr]&((ppu.Reg[1]&PPU_GRAY)?0x30:0x3F);
//shadow read
uint16_t workAddr = ppuGetVramTbl(writeAddr) | (writeAddr & 0x3FF);
ppu.VramReadBuf = mapperVramGet8(workAddr);
}
ppu.VramAddr += (ppu.Reg[0] & PPU_INC_AMOUNT) ? 32 : 1;
//For MMC3 IRQ (Shadow Read)
if((ppu.VramAddr&0x3FFF) < 0x2000)
mapperChrGet8(ppu.VramAddr&0x3FFF);
}
//if(ret & PPU_FLAG_VBLANK)
//printf("ppuGet8 %04x:%02x\n",reg,ret);
ppu.lastVal = ret;
return ret;
}
bool ppuNMI()
{
if(ppu.VBlankFlagCleared && !ppu.VBlankClearCycle)
{
ppu.VBlankFlagCleared = false;
ppu.NMIallowed = false;
}
if(ppu.CurNMIStat && ppu.NMIallowed)
{
if(ppu.NMITriggered == false)
{
ppu.NMITriggered = true;
return true;
}
else
return false;
}
ppu.NMITriggered = false;
return false;
}
void ppuDumpMem()
{
FILE *f = fopen("PPU_VRAM.bin","wb");
if(f)
{
fwrite(ppu.VRAM,1,0x1000,f);
fclose(f);
}
f = fopen("PPU_OAM.bin","wb");
if(f)
{
fwrite(ppu.OAM,1,0x100,f);
fclose(f);
}
f = fopen("PPU_Sprites.bin","wb");
if(f)
{
fwrite(ppu.Sprites,1,0x20,f);
fclose(f);
}
}
uint16_t ppuGetCurVramAddr()
{
return ppu.VramAddr;
}
void ppuSetNameTblSingleLower()
{
ppu.NameTbl[0] = 0; ppu.NameTbl[1] = 0; ppu.NameTbl[2] = 0; ppu.NameTbl[3] = 0;
}
void ppuSetNameTblSingleUpper()
{
ppu.NameTbl[0] = 0x400; ppu.NameTbl[1] = 0x400; ppu.NameTbl[2] = 0x400; ppu.NameTbl[3] = 0x400;
}
void ppuSetNameTblVertical()
{
ppu.NameTbl[0] = 0; ppu.NameTbl[1] = 0x400; ppu.NameTbl[2] = 0; ppu.NameTbl[3] = 0x400;
}
void ppuSetNameTblHorizontal()
{
ppu.NameTbl[0] = 0; ppu.NameTbl[1] = 0; ppu.NameTbl[2] = 0x400; ppu.NameTbl[3] = 0x400;
}
void ppuSetNameTbl4Screen()
{
ppu4Screen = true;
ppu.NameTbl[0] = 0; ppu.NameTbl[1] = 0x400; ppu.NameTbl[2] = 0x800; ppu.NameTbl[3] = 0xC00;
}
void ppuSetNameTblCustom(uint16_t addrA, uint16_t addrB, uint16_t addrC, uint16_t addrD)
{
//printf("%04x %04x %04x %04x\n", addrA, addrB, addrC, addrD);
//ppuPrintppu.curLineDot();
ppu.NameTbl[0] = addrA; ppu.NameTbl[1] = addrB; ppu.NameTbl[2] = addrC; ppu.NameTbl[3] = addrD;
}
void ppuBackUpTbl()
{
ppu.NameTblBak[0] = ppu.NameTbl[0]; ppu.NameTblBak[1] = ppu.NameTbl[1];
ppu.NameTblBak[2] = ppu.NameTbl[2]; ppu.NameTblBak[3] = ppu.NameTbl[3];
}
void ppuRestoreTbl()
{
ppu.NameTbl[0] = ppu.NameTblBak[0]; ppu.NameTbl[1] = ppu.NameTblBak[1];
ppu.NameTbl[2] = ppu.NameTblBak[2]; ppu.NameTbl[3] = ppu.NameTblBak[3];
}
//64x12 1BPP "Track"
static const uint8_t ppuNSFTextTrack[96] =
{
0x0C, 0x1C, 0x03, 0xD8, 0x7C, 0x71, 0xC0, 0x00, 0x0C, 0x1C, 0x07, 0xF8, 0xFE, 0x73, 0x80, 0x00,
0x0C, 0x1C, 0x06, 0x39, 0xE2, 0x77, 0x00, 0x00, 0x0C, 0x1C, 0x07, 0x39, 0xC0, 0x7E, 0x00, 0x00,
0x0C, 0x1C, 0x07, 0xF9, 0xC0, 0x7C, 0x00, 0x00, 0x0C, 0x1C, 0x01, 0xF9, 0xC0, 0x7C, 0x00, 0x00,
0x0C, 0x1E, 0x60, 0x38, 0xE2, 0x7E, 0x00, 0x00, 0x0C, 0x1F, 0xE3, 0xF8, 0xFE, 0x77, 0x00, 0x00,
0x0C, 0x1D, 0xC3, 0xF0, 0x3C, 0x73, 0xC0, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00,
0xFF, 0xC0, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0xFF, 0xC0, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00,
};
//128x12 1BPP "0123456789/"
static const uint8_t ppuNsfTextRest[192] =
{
0x0E, 0x1F, 0xF7, 0xF8, 0xF8, 0x03, 0x9F, 0x01, 0xF0, 0x60, 0x1F, 0x0F, 0x83, 0x00, 0x00, 0x00,
0x3F, 0x9F, 0xF7, 0xF9, 0xFC, 0x03, 0x9F, 0xC3, 0xF8, 0x70, 0x3F, 0x8F, 0xC3, 0x00, 0x00, 0x00,
0x3B, 0x83, 0x83, 0x80, 0x0E, 0x7F, 0xC1, 0xE7, 0x1C, 0x70, 0x71, 0xC0, 0xE1, 0x80, 0x00, 0x00,
0x71, 0xC3, 0x81, 0xC0, 0x0E, 0x7F, 0xC0, 0xE7, 0x1C, 0x30, 0x71, 0xC0, 0x71, 0x80, 0x00, 0x00,
0x79, 0xC3, 0x80, 0xE0, 0x0E, 0x63, 0x80, 0xE7, 0x1C, 0x38, 0x71, 0xC7, 0x70, 0xC0, 0x00, 0x00,
0x7D, 0xC3, 0x80, 0x70, 0x7E, 0x33, 0x81, 0xE7, 0x1C, 0x18, 0x3F, 0x8F, 0xF0, 0xC0, 0x00, 0x00,
0x77, 0xC3, 0x80, 0x70, 0x7C, 0x13, 0x9F, 0xC7, 0xF8, 0x1C, 0x1F, 0x1C, 0x70, 0x60, 0x00, 0x00,
0x73, 0xC3, 0x80, 0x38, 0x0E, 0x1B, 0x9F, 0x87, 0x70, 0x1C, 0x31, 0x9C, 0x70, 0x60, 0x00, 0x00,
0x71, 0xC3, 0x80, 0x38, 0x0E, 0x0B, 0x9C, 0x07, 0x00, 0x0C, 0x71, 0xDC, 0x70, 0x30, 0x00, 0x00,
0x3B, 0x9F, 0x80, 0x38, 0x0E, 0x0F, 0x9C, 0x03, 0x80, 0x0E, 0x71, 0xDC, 0x70, 0x30, 0x00, 0x00,
0x3F, 0x8F, 0x83, 0xF1, 0xFC, 0x07, 0x9F, 0xC1, 0xF9, 0xFE, 0x3F, 0x8F, 0xE0, 0x18, 0x00, 0x00,
0x0E, 0x03, 0x81, 0xE0, 0xF8, 0x03, 0x9F, 0xC0, 0xF9, 0xFE, 0x1F, 0x07, 0xC0, 0x18, 0x00, 0x00,
};
static void ppuDrawRest(uint8_t curX, uint8_t sym)
{
uint8_t i, j;
for(i = 0; i < 12; i++)
{
for(j = 0; j < 10; j++)
{
size_t drawPos = (j+curX)+((i+9)*256);
uint8_t xSel = (j+(sym*10));
if(ppuNsfTextRest[((11-i)<<4)+(xSel>>3)]&(0x80>>(xSel&7)))
textureImage[drawPos] = 0xFFFFFFFF; //White
else
textureImage[drawPos] = 0xFF000000; //Black
}
}
}
void ppuDrawNSFTrackNum(uint8_t cTrack, uint8_t trackTotal)
{
memset(textureImage,0,0xB400);
uint8_t curX = 4;
//draw "Track"
uint8_t i, j;
for(i = 0; i < 12; i++)
{
for(j = 0; j < 50; j++)
{
size_t drawPos = (j+curX)+((i+9)*256);
if(ppuNSFTextTrack[((11-i)<<3)+(j>>3)]&(0x80>>(j&7)))
textureImage[drawPos] = 0xFFFFFFFF; //White
else
textureImage[drawPos] = 0xFF000000; //Black
}
}
//"Track" len+space
curX+=60;
//draw current num
if(cTrack > 99)
{
ppuDrawRest(curX, (cTrack/100)%10);
curX+=10;
}
if(cTrack > 9)
{
ppuDrawRest(curX, (cTrack/10)%10);
curX+=10;
}
ppuDrawRest(curX, cTrack%10);
curX+=10;
//draw the "/"
ppuDrawRest(curX, 10);
curX+=10;
//draw total num
if(trackTotal > 99)
{
ppuDrawRest(curX, (trackTotal/100)%10);
curX+=10;
}
if(trackTotal > 9)
{
ppuDrawRest(curX, (trackTotal/10)%10);
curX+=10;
}
ppuDrawRest(curX, trackTotal%10);
curX+=10;
}
uint8_t ppuVRAMGet8(uint16_t addr)
{
return ppu.VRAM[addr&0xFFF];
}
void ppuVRAMSet8(uint16_t addr, uint8_t val)
{
ppu.VRAM[addr&0xFFF] = val;
}
uint8_t* ppuGetVRAM()
{
return ppu.VRAM;
}
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