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This commit is contained in:
retro-wertz
2017-10-15 03:13:11 +08:00
parent ebca2248d0
commit 52c8155dee
33 changed files with 441 additions and 408 deletions
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109
src/ppu.c
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@@ -40,15 +40,15 @@
#include "video.h"
#include "input.h"
#define VBlankON (PPU[0] & 0x80) //Generate VBlank NMI
#define Sprite16 (PPU[0] & 0x20) //Sprites 8x16/8x8
#define BGAdrHI (PPU[0] & 0x10) //BG pattern adr $0000/$1000
#define SpAdrHI (PPU[0] & 0x08) //Sprite pattern adr $0000/$1000
#define INC32 (PPU[0] & 0x04) //auto increment 1/32
#define VBlankON (PPU[0] & 0x80) /* Generate VBlank NMI */
#define Sprite16 (PPU[0] & 0x20) /* Sprites 8x16/8x8 */
#define BGAdrHI (PPU[0] & 0x10) /* BG pattern adr $0000/$1000 */
#define SpAdrHI (PPU[0] & 0x08) /* Sprite pattern adr $0000/$1000 */
#define INC32 (PPU[0] & 0x04) /* auto increment 1/32 */
#define SpriteON (PPU[1] & 0x10) //Show Sprite
#define ScreenON (PPU[1] & 0x08) //Show screen
#define GRAYSCALE (PPU[1] & 0x01) //Grayscale (AND palette entries with 0x30)
#define SpriteON (PPU[1] & 0x10) /* Show Sprite */
#define ScreenON (PPU[1] & 0x08) /* Show screen */
#define GRAYSCALE (PPU[1] & 0x01) /* Grayscale (AND palette entries with 0x30) */
#define PPU_status (PPU[2])
@@ -109,7 +109,7 @@ uint8 *vnapage[4];
uint8 PPUNTARAM = 0;
uint8 PPUCHRRAM = 0;
//Color deemphasis emulation. Joy...
/* Color deemphasis emulation. Joy... */
static uint8 deemp = 0;
static int deempcnt[8];
@@ -123,15 +123,16 @@ uint32 TempAddr = 0, RefreshAddr = 0;
static int maxsprites = 8;
//scanline is equal to the current visible scanline we're on.
/* scanline is equal to the current visible scanline we're on. */
int scanline;
static uint32 scanlines_per_frame;
uint8 PPU[4];
uint8 PPUSPL;
uint8 NTARAM[0x800], PALRAM[0x20], SPRAM[0x100], SPRBUF[0x100];
uint8 UPALRAM[0x03];//for 0x4/0x8/0xC addresses in palette, the ones in
//0x20 are 0 to not break fceu rendering.
uint8 UPALRAM[0x03];/* for 0x4/0x8/0xC addresses in palette, the ones in
* 0x20 are 0 to not break fceu rendering.
*/
#define MMC5SPRVRAMADR(V) &MMC5SPRVPage[(V) >> 10][(V)]
#define VRAMADR(V) &VPage[(V) >> 10][(V)]
@@ -176,7 +177,7 @@ static DECLFR(A2007) {
FCEUPPU_LineUpdate();
if (tmp >= 0x3F00) { // Palette RAM tied directly to the output data, without VRAM buffer
if (tmp >= 0x3F00) { /* Palette RAM tied directly to the output data, without VRAM buffer */
if (!(tmp & 3)) {
if (!(tmp & 0xC))
ret = PALRAM[0x00];
@@ -431,11 +432,12 @@ static void CheckSpriteHit(int p) {
}
}
//spork the world. Any sprites on this line? Then this will be set to 1.
//Needed for zapper emulation and *gasp* sprite emulation.
/* spork the world. Any sprites on this line? Then this will be set to 1.
* Needed for zapper emulation and *gasp* sprite emulation.
*/
static int spork = 0;
// lasttile is really "second to last tile."
/* lasttile is really "second to last tile." */
static void FASTAPASS(1) RefreshLine(int lastpixel) {
static uint32 pshift[2];
static uint32 atlatch;
@@ -448,11 +450,12 @@ static void FASTAPASS(1) RefreshLine(int lastpixel) {
register uint8 *P = Pline;
int lasttile = lastpixel >> 3;
int numtiles;
static int norecurse = 0; // Yeah, recursion would be bad.
// PPU_hook() functions can call
// mirroring/chr bank switching functions,
// which call FCEUPPU_LineUpdate, which call this
// function.
static int norecurse = 0; /* Yeah, recursion would be bad.
* PPU_hook() functions can call
* mirroring/chr bank switching functions,
* which call FCEUPPU_LineUpdate, which call this
* function.
*/
if (norecurse) return;
if (sphitx != 0x100 && !(PPU_status & 0x40)) {
@@ -496,14 +499,15 @@ static void FASTAPASS(1) RefreshLine(int lastpixel) {
return;
}
//Priority bits, needed for sprite emulation.
/* Priority bits, needed for sprite emulation. */
Pal[0] |= 64;
Pal[4] |= 64;
Pal[8] |= 64;
Pal[0xC] |= 64;
//This high-level graphics MMC5 emulation code was written for MMC5 carts in "CL" mode.
//It's probably not totally correct for carts in "SL" mode.
/* This high-level graphics MMC5 emulation code was written for MMC5 carts in "CL" mode.
* It's probably not totally correct for carts in "SL" mode.
*/
#define PPUT_MMC5
if (MMC5Hack && geniestage != 1) {
@@ -577,7 +581,7 @@ static void FASTAPASS(1) RefreshLine(int lastpixel) {
#undef vofs
#undef RefreshAddr
//Reverse changes made before.
/* Reverse changes made before. */
Pal[0] &= 63;
Pal[4] &= 63;
Pal[8] &= 63;
@@ -612,7 +616,7 @@ static void FASTAPASS(1) RefreshLine(int lastpixel) {
tofix = 0;
}
//This only works right because of a hack earlier in this function.
/* This only works right because of a hack earlier in this function. */
CheckSpriteHit(lastpixel);
if (InputScanlineHook && (lastpixel - 16) >= 0) {
@@ -649,7 +653,7 @@ static void Fixit1(void) {
}
}
void MMC5_hb(int); //Ugh ugh ugh.
void MMC5_hb(int); /* Ugh ugh ugh. */
static void DoLine(void)
{
int x;
@@ -669,7 +673,7 @@ static void DoLine(void)
X6502_Run(256);
EndRL();
if (rendis & 2) {// User asked to not display background data.
if (rendis & 2) {/* User asked to not display background data. */
uint32 tem;
tem = Pal[0] | (Pal[0] << 8) | (Pal[0] << 16) | (Pal[0] << 24);
tem |= 0x40404040;
@@ -679,7 +683,7 @@ static void DoLine(void)
if (SpriteON)
CopySprites(target);
if (ScreenON || SpriteON) { // Yes, very el-cheapo.
if (ScreenON || SpriteON) { /* Yes, very el-cheapo. */
if (PPU[1] & 0x01) {
for (x = 63; x >= 0; x--)
*(uint32*)&target[x << 2] = (*(uint32*)&target[x << 2]) & 0x30303030;
@@ -709,7 +713,7 @@ static void DoLine(void)
} else {
X6502_Run(85 - 6 - 16);
// A semi-hack for Star Trek: 25th Anniversary
/* A semi-hack for Star Trek: 25th Anniversary */
if (GameHBIRQHook && (ScreenON || SpriteON) && ((PPU[0] & 0x38) != 0x18))
GameHBIRQHook();
}
@@ -861,7 +865,7 @@ static void FetchSpriteData(void) {
}
}
//Handle case when >8 sprites per scanline option is enabled.
/* Handle case when >8 sprites per scanline option is enabled. */
if (ns > 8) PPU_status |= 0x20;
else if (PPU_hook) {
for (n = 0; n < (8 - ns); n++) {
@@ -996,7 +1000,7 @@ static void CopySprites(uint8 *target) {
if (!spork) return;
spork = 0;
if (rendis & 1) return; //User asked to not display sprites.
if (rendis & 1) return; /* User asked to not display sprites. */
do
{
@@ -1005,43 +1009,43 @@ static void CopySprites(uint8 *target) {
if (t != 0x80808080) {
#ifdef MSB_FIRST
if (!(t & 0x80000000)) {
if (!(t & 0x40000000) || (P[n] & 64)) // Normal sprite || behind bg sprite
if (!(t & 0x40000000) || (P[n] & 64)) /* Normal sprite || behind bg sprite */
P[n] = sprlinebuf[n];
}
if (!(t & 0x800000)) {
if (!(t & 0x400000) || (P[n + 1] & 64)) // Normal sprite || behind bg sprite
if (!(t & 0x400000) || (P[n + 1] & 64)) /* Normal sprite || behind bg sprite */
P[n + 1] = (sprlinebuf + 1)[n];
}
if (!(t & 0x8000)) {
if (!(t & 0x4000) || (P[n + 2] & 64)) // Normal sprite || behind bg sprite
if (!(t & 0x4000) || (P[n + 2] & 64)) /* Normal sprite || behind bg sprite */
P[n + 2] = (sprlinebuf + 2)[n];
}
if (!(t & 0x80)) {
if (!(t & 0x40) || (P[n + 3] & 64)) // Normal sprite || behind bg sprite
if (!(t & 0x40) || (P[n + 3] & 64)) /* Normal sprite || behind bg sprite */
P[n + 3] = (sprlinebuf + 3)[n];
}
#else
if (!(t & 0x80)) {
if (!(t & 0x40) || (P[n] & 0x40)) // Normal sprite || behind bg sprite
if (!(t & 0x40) || (P[n] & 0x40)) /* Normal sprite || behind bg sprite */
P[n] = sprlinebuf[n];
}
if (!(t & 0x8000)) {
if (!(t & 0x4000) || (P[n + 1] & 0x40)) // Normal sprite || behind bg sprite
if (!(t & 0x4000) || (P[n + 1] & 0x40)) /* Normal sprite || behind bg sprite */
P[n + 1] = (sprlinebuf + 1)[n];
}
if (!(t & 0x800000)) {
if (!(t & 0x400000) || (P[n + 2] & 0x40)) // Normal sprite || behind bg sprite
if (!(t & 0x400000) || (P[n + 2] & 0x40)) /* Normal sprite || behind bg sprite */
P[n + 2] = (sprlinebuf + 2)[n];
}
if (!(t & 0x80000000)) {
if (!(t & 0x40000000) || (P[n + 3] & 0x40)) // Normal sprite || behind bg sprite
if (!(t & 0x40000000) || (P[n + 3] & 0x40)) /* Normal sprite || behind bg sprite */
P[n + 3] = (sprlinebuf + 3)[n];
}
#endif
@@ -1094,7 +1098,7 @@ void FCEUPPU_Power(void) {
BWrite[x + 2] = B2002;
ARead[x + 3] = A200x;
BWrite[x + 3] = B2003;
ARead[x + 4] = A200x; //A2004;
ARead[x + 4] = A200x; /* A2004; */
BWrite[x + 4] = B2004;
ARead[x + 5] = A200x;
BWrite[x + 5] = B2005;
@@ -1113,7 +1117,7 @@ void FCEUPPU_Power(void) {
BWrite[x + 2] = B2002;
ARead[x + 3] = A200x;
BWrite[x + 3] = B2003;
ARead[x + 4] = A200x; //A2004;
ARead[x + 4] = A200x; /* A2004; */
BWrite[x + 4] = B2004;
ARead[x + 5] = A200x;
BWrite[x + 5] = B2005;
@@ -1128,7 +1132,7 @@ void FCEUPPU_Power(void) {
int FCEUPPU_Loop(int skip) {
//Needed for Knight Rider, possibly others.
/* Needed for Knight Rider, possibly others. */
if (ppudead) {
memset(XBuf, 0x80, 256 * 240);
X6502_Run(scanlines_per_frame * (256 + 85));
@@ -1137,12 +1141,13 @@ int FCEUPPU_Loop(int skip) {
X6502_Run(256 + 85);
PPU_status |= 0x80;
//Not sure if this is correct. According to Matt Conte and my own tests, it is.
//Timing is probably off, though.
//NOTE: Not having this here breaks a Super Donkey Kong game.
/* Not sure if this is correct. According to Matt Conte and my own tests, it is.
* Timing is probably off, though.
* NOTE: Not having this here breaks a Super Donkey Kong game.
*/
PPU[3] = PPUSPL = 0;
//I need to figure out the true nature and length of this delay.
/* I need to figure out the true nature and length of this delay. */
X6502_Run(12);
if (GameInfo->type == GIT_NSF)
DoNSFFrame();
@@ -1180,7 +1185,7 @@ int FCEUPPU_Loop(int skip) {
if (PPU_hook) PPU_hook(RefreshAddr & 0x3fff);
}
//Clean this stuff up later.
/* Clean this stuff up later. */
spork = numsprites = 0;
ResetRL(XBuf);
@@ -1196,7 +1201,7 @@ int FCEUPPU_Loop(int skip) {
y = SPRAM[0];
y++;
PPU_status |= 0x20; // Fixes "Bee 52". Does it break anything?
PPU_status |= 0x20; /* Fixes "Bee 52". Does it break anything? */
if (GameHBIRQHook) {
X6502_Run(256);
for (scanline = 0; scanline < 240; scanline++) {
@@ -1207,7 +1212,7 @@ int FCEUPPU_Loop(int skip) {
}
} else if (y < 240) {
X6502_Run((256 + 85) * y);
if (SpriteON) PPU_status |= 0x40; // Quick and very dirty hack.
if (SpriteON) PPU_status |= 0x40; /* Quick and very dirty hack. */
X6502_Run((256 + 85) * (240 - y));
} else
X6502_Run((256 + 85) * 240);
@@ -1218,13 +1223,13 @@ int FCEUPPU_Loop(int skip) {
deemp = PPU[1] >> 5;
// manual samples can't play correctly with overclocking
/* manual samples can't play correctly with overclocking */
if (DMC_7bit && skip_7bit_overclocking)
totalscanlines = normal_scanlines;
else
totalscanlines = normal_scanlines + (overclock_state ? extrascanlines : 0);
for (scanline = 0; scanline < totalscanlines; ) { //scanline is incremented in DoLine. Evil. :/
for (scanline = 0; scanline < totalscanlines; ) { /* scanline is incremented in DoLine. Evil. :/ */
deempcnt[deemp]++;
if ((PPUViewer) && (scanline == PPUViewScanline)) UpdatePPUView(1);
DoLine();