bsnes/src/ppu/bppu/bppu_mmio.cpp

598 lines
17 KiB
C++

void bPPU::latch_counters() {
regs.hcounter = cpu->hcounter();
regs.vcounter = cpu->vcounter();
regs.counters_latched = true;
}
uint16 bPPU::get_vram_address() {
uint16 addr;
addr = regs.vram_addr;
switch(regs.vram_mapping) {
case 0:break;
case 1:addr = (addr & 0xff00) | ((addr & 0x001f) << 3) | ((addr >> 5) & 7);break;
case 2:addr = (addr & 0xfe00) | ((addr & 0x003f) << 3) | ((addr >> 6) & 7);break;
case 3:addr = (addr & 0xfc00) | ((addr & 0x007f) << 3) | ((addr >> 7) & 7);break;
}
return (addr << 1);
}
//INIDISP
void bPPU::mmio_w2100(uint8 value) {
regs.display_disabled = !!(value & 0x80);
regs.display_brightness = value & 15;
}
//OBSEL
void bPPU::mmio_w2101(uint8 value) {
regs.oam_basesize = (value >> 5) & 7;
regs.oam_nameselect = (value >> 3) & 3;
regs.oam_tdaddr = (value & 3) << 14;
update_sprite_list_sizes();
}
//OAMADDL
void bPPU::mmio_w2102(uint8 value) {
regs.oam_addrl = value;
regs.oam_addr = ((regs.oam_addrh << 8) | regs.oam_addrl) << 1;
}
//OAMADDH
void bPPU::mmio_w2103(uint8 value) {
regs.oam_priority = !!(value & 0x80);
regs.oam_addrh = value & 1;
regs.oam_addr = ((regs.oam_addrh << 8) | regs.oam_addrl) << 1;
}
//OAMDATA
void bPPU::mmio_w2104(uint8 value) {
if(regs.oam_addr >= 0x0200) {
if(!(regs.oam_addr & 1)) {
regs.oam_latchdata = value;
}
oam_write(regs.oam_addr, value);
} else if(!(regs.oam_addr & 1)) {
regs.oam_latchdata = value;
} else {
oam_write((regs.oam_addr & 0x03fe), regs.oam_latchdata);
oam_write((regs.oam_addr & 0x03fe) + 1, value);
}
regs.oam_addr++;
regs.oam_addr &= 0x03ff;
}
//BGMODE
void bPPU::mmio_w2105(uint8 value) {
regs.bg_tilesize[BG4] = !!(value & 0x80);
regs.bg_tilesize[BG3] = !!(value & 0x40);
regs.bg_tilesize[BG2] = !!(value & 0x20);
regs.bg_tilesize[BG1] = !!(value & 0x10);
regs.bg3_priority = !!(value & 0x08);
regs.bg_mode = (value & 7);
}
//MOSAIC
void bPPU::mmio_w2106(uint8 value) {
regs.mosaic_size = (value >> 4) & 15;
regs.mosaic_enabled[BG4] = !!(value & 0x08);
regs.mosaic_enabled[BG3] = !!(value & 0x04);
regs.mosaic_enabled[BG2] = !!(value & 0x02);
regs.mosaic_enabled[BG1] = !!(value & 0x01);
}
//BG1SC
void bPPU::mmio_w2107(uint8 value) {
regs.bg_scaddr[BG1] = (value & 0x7c) << 9;
regs.bg_scsize[BG1] = value & 3;
}
//BG2SC
void bPPU::mmio_w2108(uint8 value) {
regs.bg_scaddr[BG2] = (value & 0x7c) << 9;
regs.bg_scsize[BG2] = value & 3;
}
//BG3SC
void bPPU::mmio_w2109(uint8 value) {
regs.bg_scaddr[BG3] = (value & 0x7c) << 9;
regs.bg_scsize[BG3] = value & 3;
}
//BG4SC
void bPPU::mmio_w210a(uint8 value) {
regs.bg_scaddr[BG4] = (value & 0x7c) << 9;
regs.bg_scsize[BG4] = value & 3;
}
//BG12NBA
void bPPU::mmio_w210b(uint8 value) {
regs.bg_tdaddr[BG1] = (value & 0x07) << 13;
regs.bg_tdaddr[BG2] = (value & 0x70) << 9;
}
//BG34NBA
void bPPU::mmio_w210c(uint8 value) {
regs.bg_tdaddr[BG3] = (value & 0x07) << 13;
regs.bg_tdaddr[BG4] = (value & 0x70) << 9;
}
//BG1HOFS
void bPPU::mmio_w210d(uint8 value) {
regs.bg_hofs[BG1] = (value << 8) | (regs.bg_hofs[BG1] >> 8);
}
//BG1VOFS
void bPPU::mmio_w210e(uint8 value) {
regs.bg_vofs[BG1] = (value << 8) | (regs.bg_vofs[BG1] >> 8);
}
//BG2HOFS
void bPPU::mmio_w210f(uint8 value) {
regs.bg_hofs[BG2] = (value << 8) | (regs.bg_hofs[BG2] >> 8);
}
//BG2VOFS
void bPPU::mmio_w2110(uint8 value) {
regs.bg_vofs[BG2] = (value << 8) | (regs.bg_vofs[BG2] >> 8);
}
//BG3HOFS
void bPPU::mmio_w2111(uint8 value) {
regs.bg_hofs[BG3] = (value << 8) | (regs.bg_hofs[BG3] >> 8);
}
//BG3VOFS
void bPPU::mmio_w2112(uint8 value) {
regs.bg_vofs[BG3] = (value << 8) | (regs.bg_vofs[BG3] >> 8);
}
//BG4HOFS
void bPPU::mmio_w2113(uint8 value) {
regs.bg_hofs[BG4] = (value << 8) | (regs.bg_hofs[BG4] >> 8);
}
//BG4VOFS
void bPPU::mmio_w2114(uint8 value) {
regs.bg_vofs[BG4] = (value << 8) | (regs.bg_vofs[BG4] >> 8);
}
//VMAIN
void bPPU::mmio_w2115(uint8 value) {
regs.vram_incmode = !!(value & 0x80);
regs.vram_mapping = (value >> 2) & 3;
switch(value & 3) {
case 0:regs.vram_incsize = 1;break;
case 1:regs.vram_incsize = 32;break;
case 2:regs.vram_incsize = 128;break;
case 3:regs.vram_incsize = 128;break;
}
}
//VMADDL
void bPPU::mmio_w2116(uint8 value) {
regs.vram_addr = (regs.vram_addr & 0xff00) | value;
uint16 addr = get_vram_address();
regs.vram_readbuffer = vram_read(addr);
regs.vram_readbuffer |= vram_read(addr + 1) << 8;
}
//VMADDH
void bPPU::mmio_w2117(uint8 value) {
regs.vram_addr = (value << 8) | (regs.vram_addr & 0x00ff);
uint16 addr = get_vram_address();
regs.vram_readbuffer = vram_read(addr);
regs.vram_readbuffer |= vram_read(addr + 1) << 8;
}
//VMDATAL
void bPPU::mmio_w2118(uint8 value) {
uint16 addr = get_vram_address();
vram_write(addr, value);
if(regs.vram_incmode == 0) {
regs.vram_addr += regs.vram_incsize;
}
bg_tiledata_state[TILE_2BIT][(addr >> 4)] = 1;
bg_tiledata_state[TILE_4BIT][(addr >> 5)] = 1;
bg_tiledata_state[TILE_8BIT][(addr >> 6)] = 1;
}
//VMDATAH
void bPPU::mmio_w2119(uint8 value) {
uint16 addr = get_vram_address() + 1;
vram_write(addr, value);
if(regs.vram_incmode == 1) {
regs.vram_addr += regs.vram_incsize;
}
bg_tiledata_state[TILE_2BIT][(addr >> 4)] = 1;
bg_tiledata_state[TILE_4BIT][(addr >> 5)] = 1;
bg_tiledata_state[TILE_8BIT][(addr >> 6)] = 1;
}
//M7SEL
void bPPU::mmio_w211a(uint8 value) {
regs.mode7_repeat = (value >> 6) & 3;
regs.mode7_vflip = !!(value & 0x02);
regs.mode7_hflip = !!(value & 0x01);
}
//M7A
void bPPU::mmio_w211b(uint8 value) {
regs.m7a = (value << 8) | (regs.m7a >> 8);
}
//M7B
void bPPU::mmio_w211c(uint8 value) {
regs.m7b = (value << 8) | (regs.m7b >> 8);
}
//M7C
void bPPU::mmio_w211d(uint8 value) {
regs.m7c = (value << 8) | (regs.m7c >> 8);
}
//M7D
void bPPU::mmio_w211e(uint8 value) {
regs.m7d = (value << 8) | (regs.m7d >> 8);
}
//M7X
void bPPU::mmio_w211f(uint8 value) {
regs.m7x = (value << 8) | (regs.m7x >> 8);
}
//M7Y
void bPPU::mmio_w2120(uint8 value) {
regs.m7y = (value << 8) | (regs.m7y >> 8);
}
//CGADD
void bPPU::mmio_w2121(uint8 value) {
regs.cgram_addr = value << 1;
}
//CGDATA
void bPPU::mmio_w2122(uint8 value) {
cgram_write(regs.cgram_addr, value);
regs.cgram_addr++;
regs.cgram_addr &= 0x01ff;
}
//W12SEL
void bPPU::mmio_w2123(uint8 value) {
regs.bg_window2_enabled[BG2] = !!(value & 0x80);
regs.bg_window2_invert [BG2] = !!(value & 0x40);
regs.bg_window1_enabled[BG2] = !!(value & 0x20);
regs.bg_window1_invert [BG2] = !!(value & 0x10);
regs.bg_window2_enabled[BG1] = !!(value & 0x08);
regs.bg_window2_invert [BG1] = !!(value & 0x04);
regs.bg_window1_enabled[BG1] = !!(value & 0x02);
regs.bg_window1_invert [BG1] = !!(value & 0x01);
}
//W34SEL
void bPPU::mmio_w2124(uint8 value) {
regs.bg_window2_enabled[BG4] = !!(value & 0x80);
regs.bg_window2_invert [BG4] = !!(value & 0x40);
regs.bg_window1_enabled[BG4] = !!(value & 0x20);
regs.bg_window1_invert [BG4] = !!(value & 0x10);
regs.bg_window2_enabled[BG3] = !!(value & 0x08);
regs.bg_window2_invert [BG3] = !!(value & 0x04);
regs.bg_window1_enabled[BG3] = !!(value & 0x02);
regs.bg_window1_invert [BG3] = !!(value & 0x01);
}
//WOBJSEL
void bPPU::mmio_w2125(uint8 value) {
regs.color_window2_enabled = !!(value & 0x80);
regs.color_window2_invert = !!(value & 0x40);
regs.color_window1_enabled = !!(value & 0x20);
regs.color_window1_invert = !!(value & 0x10);
regs.bg_window2_enabled[OAM] = !!(value & 0x08);
regs.bg_window2_invert [OAM] = !!(value & 0x04);
regs.bg_window1_enabled[OAM] = !!(value & 0x02);
regs.bg_window1_invert [OAM] = !!(value & 0x01);
}
//WH0
void bPPU::mmio_w2126(uint8 value) {
regs.window1_left = value;
}
//WH1
void bPPU::mmio_w2127(uint8 value) {
regs.window1_right = value;
}
//WH2
void bPPU::mmio_w2128(uint8 value) {
regs.window2_left = value;
}
//WH3
void bPPU::mmio_w2129(uint8 value) {
regs.window2_right = value;
}
//WBGLOG
void bPPU::mmio_w212a(uint8 value) {
regs.bg_window_mask[BG4] = (value >> 6) & 3;
regs.bg_window_mask[BG3] = (value >> 4) & 3;
regs.bg_window_mask[BG2] = (value >> 2) & 3;
regs.bg_window_mask[BG1] = (value ) & 3;
}
//WOBJLOG
void bPPU::mmio_w212b(uint8 value) {
regs.color_window_mask = (value >> 2) & 3;
regs.bg_window_mask[OAM] = (value ) & 3;
}
//TM
void bPPU::mmio_w212c(uint8 value) {
regs.bg_enabled[OAM] = !!(value & 0x10);
regs.bg_enabled[BG4] = !!(value & 0x08);
regs.bg_enabled[BG3] = !!(value & 0x04);
regs.bg_enabled[BG2] = !!(value & 0x02);
regs.bg_enabled[BG1] = !!(value & 0x01);
}
//TS
void bPPU::mmio_w212d(uint8 value) {
regs.bgsub_enabled[OAM] = !!(value & 0x10);
regs.bgsub_enabled[BG4] = !!(value & 0x08);
regs.bgsub_enabled[BG3] = !!(value & 0x04);
regs.bgsub_enabled[BG2] = !!(value & 0x02);
regs.bgsub_enabled[BG1] = !!(value & 0x01);
}
//TMW
void bPPU::mmio_w212e(uint8 value) {
regs.bg_window_enabled[OAM] = !!(value & 0x10);
regs.bg_window_enabled[BG4] = !!(value & 0x08);
regs.bg_window_enabled[BG3] = !!(value & 0x04);
regs.bg_window_enabled[BG2] = !!(value & 0x02);
regs.bg_window_enabled[BG1] = !!(value & 0x01);
}
//TSW
void bPPU::mmio_w212f(uint8 value) {
regs.bgsub_window_enabled[OAM] = !!(value & 0x10);
regs.bgsub_window_enabled[BG4] = !!(value & 0x08);
regs.bgsub_window_enabled[BG3] = !!(value & 0x04);
regs.bgsub_window_enabled[BG2] = !!(value & 0x02);
regs.bgsub_window_enabled[BG1] = !!(value & 0x01);
}
//CGWSEL
void bPPU::mmio_w2130(uint8 value) {
regs.color_mask = (value >> 6) & 3;
regs.colorsub_mask = (value >> 4) & 3;
regs.addsub_mode = !!(value & 0x02);
}
//CGADDSUB
void bPPU::mmio_w2131(uint8 value) {
regs.color_mode = !!(value & 0x80);
regs.color_halve = !!(value & 0x40);
regs.bg_color_enabled[BACK] = !!(value & 0x20);
regs.bg_color_enabled[OAM] = !!(value & 0x10);
regs.bg_color_enabled[BG4] = !!(value & 0x08);
regs.bg_color_enabled[BG3] = !!(value & 0x04);
regs.bg_color_enabled[BG2] = !!(value & 0x02);
regs.bg_color_enabled[BG1] = !!(value & 0x01);
}
//COLDATA
void bPPU::mmio_w2132(uint8 value) {
if(value & 0x80)regs.color_b = value & 0x1f;
if(value & 0x40)regs.color_g = value & 0x1f;
if(value & 0x20)regs.color_r = value & 0x1f;
}
//SETINI
void bPPU::mmio_w2133(uint8 value) {
regs.mode7_extbg = !!(value & 0x40);
regs.overscan = !!(value & 0x04);
regs.scanlines = (value & 0x04)?239:224;
regs.oam_halve = !!(value & 0x02);
regs.interlace = !!(value & 0x01);
cpu->set_overscan(regs.overscan);
cpu->set_interlace(regs.interlace);
}
//MPYL
uint8 bPPU::mmio_r2134() {
uint32 r;
r = ((int16)regs.m7a * (int8)(regs.m7b >> 8));
return (r);
}
//MPYM
uint8 bPPU::mmio_r2135() {
uint32 r;
r = ((int16)regs.m7a * (int8)(regs.m7b >> 8));
return (r >> 8);
}
//MPYH
uint8 bPPU::mmio_r2136() {
uint32 r;
r = ((int16)regs.m7a * (int8)(regs.m7b >> 8));
return (r >> 16);
}
//SLHV
uint8 bPPU::mmio_r2137() {
if(cpu->pio_status() & 0x80) {
latch_counters();
}
return 0x00;
}
//OAMDATAREAD
uint8 bPPU::mmio_r2138() {
uint8 r;
r = oam_read(regs.oam_addr);
if(!(regs.oam_addr & 1)) {
regs.oam_latchdata = r;
}
regs.oam_addr++;
regs.oam_addr &= 0x03ff;
return r;
}
//VMDATALREAD
uint8 bPPU::mmio_r2139() {
uint16 addr = get_vram_address();
uint8 r = regs.vram_readbuffer;
if(regs.vram_incmode == 0) {
addr &= 0xfffe;
regs.vram_readbuffer = vram_read(addr);
regs.vram_readbuffer |= vram_read(addr + 1) << 8;
regs.vram_addr += regs.vram_incsize;
}
return r;
}
//VMDATAHREAD
uint8 bPPU::mmio_r213a() {
uint16 addr = get_vram_address() + 1;
uint8 r = regs.vram_readbuffer >> 8;
if(regs.vram_incmode == 1) {
addr &= 0xfffe;
regs.vram_readbuffer = vram_read(addr);
regs.vram_readbuffer |= vram_read(addr + 1) << 8;
regs.vram_addr += regs.vram_incsize;
}
return r;
}
//CGDATAREAD
uint8 bPPU::mmio_r213b() {
uint8 r;
r = cgram_read(regs.cgram_addr);
regs.cgram_addr++;
regs.cgram_addr &= 0x01ff;
return r;
}
//OPHCT
uint8 bPPU::mmio_r213c() {
uint16 r = regs.hcounter;
if(regs.latch_hcounter)r >>= 8;
regs.latch_hcounter ^= 1;
return r;
}
//OPVCT
uint8 bPPU::mmio_r213d() {
uint16 r = regs.vcounter;
if(regs.latch_vcounter)r >>= 8;
regs.latch_vcounter ^= 1;
return r;
}
//STAT77
uint8 bPPU::mmio_r213e() {
uint8 r = 0x00;
r |= (regs.time_over) ?0x80:0x00;
r |= (regs.range_over)?0x40:0x00;
r |= 0x01; //PPU1 version number
return r;
}
//STAT78
uint8 bPPU::mmio_r213f() {
uint8 r = 0x00;
regs.latch_hcounter = 0;
regs.latch_vcounter = 0;
r |= cpu->interlace_field() << 7;
if(!(cpu->pio_status() & 0x80)) {
r |= 1 << 6;
} else if(regs.counters_latched == true) {
r |= 1 << 6;
regs.counters_latched = false;
}
r |= (1 << 5);
r |= 0x03; //PPU2 version number
return r;
}
uint8 bPPUMMIO::read(uint32 addr) {
//cpu->sync();
switch(addr) {
case 0x2134:return ppu->mmio_r2134(); //MPYL
case 0x2135:return ppu->mmio_r2135(); //MPYM
case 0x2136:return ppu->mmio_r2136(); //MPYH
case 0x2137:return ppu->mmio_r2137(); //SLHV
case 0x2138:return ppu->mmio_r2138(); //OAMDATAREAD
case 0x2139:return ppu->mmio_r2139(); //VMDATALREAD
case 0x213a:return ppu->mmio_r213a(); //VMDATAHREAD
case 0x213b:return ppu->mmio_r213b(); //CGDATAREAD
case 0x213c:return ppu->mmio_r213c(); //OPHCT
case 0x213d:return ppu->mmio_r213d(); //OPVCT
case 0x213e:return ppu->mmio_r213e(); //STAT77
case 0x213f:return ppu->mmio_r213f(); //STAT78
}
return 0x00;
}
void bPPUMMIO::write(uint32 addr, uint8 value) {
//cpu->sync();
switch(addr) {
case 0x2100:ppu->mmio_w2100(value);return; //INIDISP
case 0x2101:ppu->mmio_w2101(value);return; //OBSEL
case 0x2102:ppu->mmio_w2102(value);return; //OAMADDL
case 0x2103:ppu->mmio_w2103(value);return; //OAMADDH
case 0x2104:ppu->mmio_w2104(value);return; //OAMDATA
case 0x2105:ppu->mmio_w2105(value);return; //BGMODE
case 0x2106:ppu->mmio_w2106(value);return; //MOSAIC
case 0x2107:ppu->mmio_w2107(value);return; //BG1SC
case 0x2108:ppu->mmio_w2108(value);return; //BG2SC
case 0x2109:ppu->mmio_w2109(value);return; //BG3SC
case 0x210a:ppu->mmio_w210a(value);return; //BG4SC
case 0x210b:ppu->mmio_w210b(value);return; //BG12NBA
case 0x210c:ppu->mmio_w210c(value);return; //BG34NBA
case 0x210d:ppu->mmio_w210d(value);return; //BG1HOFS
case 0x210e:ppu->mmio_w210e(value);return; //BG1VOFS
case 0x210f:ppu->mmio_w210f(value);return; //BG2HOFS
case 0x2110:ppu->mmio_w2110(value);return; //BG2VOFS
case 0x2111:ppu->mmio_w2111(value);return; //BG3HOFS
case 0x2112:ppu->mmio_w2112(value);return; //BG3VOFS
case 0x2113:ppu->mmio_w2113(value);return; //BG4HOFS
case 0x2114:ppu->mmio_w2114(value);return; //BG4VOFS
case 0x2115:ppu->mmio_w2115(value);return; //VMAIN
case 0x2116:ppu->mmio_w2116(value);return; //VMADDL
case 0x2117:ppu->mmio_w2117(value);return; //VMADDH
case 0x2118:ppu->mmio_w2118(value);return; //VMDATAL
case 0x2119:ppu->mmio_w2119(value);return; //VMDATAH
case 0x211a:ppu->mmio_w211a(value);return; //M7SEL
case 0x211b:ppu->mmio_w211b(value);return; //M7A
case 0x211c:ppu->mmio_w211c(value);return; //M7B
case 0x211d:ppu->mmio_w211d(value);return; //M7C
case 0x211e:ppu->mmio_w211e(value);return; //M7D
case 0x211f:ppu->mmio_w211f(value);return; //M7X
case 0x2120:ppu->mmio_w2120(value);return; //M7Y
case 0x2121:ppu->mmio_w2121(value);return; //CGADD
case 0x2122:ppu->mmio_w2122(value);return; //CGDATA
case 0x2123:ppu->mmio_w2123(value);return; //W12SEL
case 0x2124:ppu->mmio_w2124(value);return; //W34SEL
case 0x2125:ppu->mmio_w2125(value);return; //WOBJSEL
case 0x2126:ppu->mmio_w2126(value);return; //WH0
case 0x2127:ppu->mmio_w2127(value);return; //WH1
case 0x2128:ppu->mmio_w2128(value);return; //WH2
case 0x2129:ppu->mmio_w2129(value);return; //WH3
case 0x212a:ppu->mmio_w212a(value);return; //WBGLOG
case 0x212b:ppu->mmio_w212b(value);return; //WOBJLOG
case 0x212c:ppu->mmio_w212c(value);return; //TM
case 0x212d:ppu->mmio_w212d(value);return; //TS
case 0x212e:ppu->mmio_w212e(value);return; //TMW
case 0x212f:ppu->mmio_w212f(value);return; //TSW
case 0x2130:ppu->mmio_w2130(value);return; //CGWSEL
case 0x2131:ppu->mmio_w2131(value);return; //CGADDSUB
case 0x2132:ppu->mmio_w2132(value);return; //COLDATA
case 0x2133:ppu->mmio_w2133(value);return; //SETINI
}
}