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BizHawk/libsnes/bsnes/snes/alt/ppu-compatibility/ppu.cpp

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bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
#include <snes/snes.hpp>
#define PPU_CPP
namespace SNES {
PPU ppu;
#include "memory/memory.cpp"
#include "mmio/mmio.cpp"
#include "render/render.cpp"
#include "serialization.cpp"
void PPU::step(unsigned clocks) {
clock += clocks;
}
void PPU::synchronize_cpu() {
if(CPU::Threaded == true) {
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
if(clock >= 0 && scheduler.sync != Scheduler::SynchronizeMode::All)
co_switch(cpu.thread);
else if(clock >= 0 && scheduler.sync == Scheduler::SynchronizeMode::All)
switch snes core back to external process. more refined this time. support use of performance core.
2012-12-25 20:36:04 +00:00
interface()->message("PPU had to advance nondeterministically!");
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
} else {
while(clock >= 0) cpu.enter();
}
}
void PPU::Enter() { ppu.enter(); }
void PPU::enter() {
snes: Fix rewind issue with tales of phantasia. Full details are as follows: Synchronize events occur right BEFORE the original thread tries to modify the data. That means that if, for instance, the SMP thread switches off to the CPU thread for a synchronize, but then the CPU switches to the PPU, commits a frame, and then in runtosave, finalizes, without having ever advanced past the SMP, when the SMP runs to save, it will do a data modify without being properly synced. The solution is for the CPU to not stop in runtosave until there's enough time for both the PPU and SMP to finish. Because of our stateful design, there's at most one event pending, so that simplifies to (smp.clock < 0 && ppu.clock < 0). This is unfortunately never guaranteed to finish, but with short timing segments on stateful PPU and SMP, and special guards in the PPU and SMP to switch back to the CPU as quickly as possible when in runtosave, it seems to work out.
2012-12-24 21:14:29 +00:00
while(true) {
if(scheduler.sync == Scheduler::SynchronizeMode::CPU) {
synchronize_cpu(); // when in CPU sync mode, always switch back to CPU as soon as possible
}
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
if(scheduler.sync == Scheduler::SynchronizeMode::All) {
scheduler.exit(Scheduler::ExitReason::SynchronizeEvent);
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
}
switch(uindex)
{
case 0: enter1(); break;
case 1: enter2(); break;
case 2: enter3(); break;
case 3: enter4(); break;
}
uindex++;
uindex &= 3;
}
}
void PPU::enter1() {
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
//H = 0 (initialize)
scanline();
add_clocks(10);
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
}
void PPU::enter2() {
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
//H = 10 (cache mode7 registers + OAM address reset)
cache.m7_hofs = regs.m7_hofs;
cache.m7_vofs = regs.m7_vofs;
cache.m7a = regs.m7a;
cache.m7b = regs.m7b;
cache.m7c = regs.m7c;
cache.m7d = regs.m7d;
cache.m7x = regs.m7x;
cache.m7y = regs.m7y;
if(vcounter() == (!overscan() ? 225 : 240)) {
if(regs.display_disabled == false) {
regs.oam_addr = regs.oam_baseaddr << 1;
regs.oam_firstsprite = (regs.oam_priority == false) ? 0 : (regs.oam_addr >> 2) & 127;
}
}
add_clocks(502);
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
}
void PPU::enter3() {
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
//H = 512 (render)
render_scanline();
add_clocks(640);
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
}
void PPU::enter4() {
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
//H = 1152 (cache OBSEL)
if(cache.oam_basesize != regs.oam_basesize) {
cache.oam_basesize = regs.oam_basesize;
sprite_list_valid = false;
}
cache.oam_nameselect = regs.oam_nameselect;
cache.oam_tdaddr = regs.oam_tdaddr;
add_clocks(lineclocks() - 1152); //seek to start of next scanline
}
void PPU::add_clocks(unsigned clocks) {
tick(clocks);
step(clocks);
synchronize_cpu();
}
void PPU::scanline() {
line = vcounter();
if(line == 0) {
frame();
//RTO flag reset
regs.time_over = false;
regs.range_over = false;
}
switch snes core back to external process. more refined this time. support use of performance core.
2012-12-25 20:36:04 +00:00
interface()->scanlineStart(line);
snes-add scanline render callbacks and add scanline selector to graphics debugger
2012-09-22 05:03:52 +00:00
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
if(line == 1) {
//mosaic reset
for(int bg = BG1; bg <= BG4; bg++) regs.bg_y[bg] = 1;
regs.mosaic_countdown = regs.mosaic_size + 1;
regs.mosaic_countdown--;
} else {
for(int bg = BG1; bg <= BG4; bg++) {
if(!regs.mosaic_enabled[bg] || !regs.mosaic_countdown) regs.bg_y[bg] = line;
}
if(!regs.mosaic_countdown) regs.mosaic_countdown = regs.mosaic_size + 1;
regs.mosaic_countdown--;
}
}
void PPU::render_scanline() {
if(line >= 1 && line < (!overscan() ? 225 : 240)) {
if(framecounter) return;
render_line_oam_rto();
render_line();
}
}
void PPU::frame() {
system.frame();
if(field() == 0) {
display.interlace = regs.interlace;
regs.scanlines = (regs.overscan == false) ? 224 : 239;
}
framecounter = (frameskip == 0 ? 0 : (framecounter + 1) % frameskip);
}
void PPU::enable() {
function<uint8 (unsigned)> read = { &PPU::mmio_read, (PPU*)&ppu };
function<void (unsigned, uint8)> write = { &PPU::mmio_write, (PPU*)&ppu };
bus.map(Bus::MapMode::Direct, 0x00, 0x3f, 0x2100, 0x213f, read, write);
bus.map(Bus::MapMode::Direct, 0x80, 0xbf, 0x2100, 0x213f, read, write);
}
void PPU::power() {
ppu1_version = config.ppu1.version;
ppu2_version = config.ppu2.version;
switch snes core back to external process. more refined this time. support use of performance core.
2012-12-25 20:36:04 +00:00
for(int i=0;i<128*1024;i++) vram[i] = 0;
for(int i=0;i<544;i++) oam[i] = 0;
for(int i=0;i<512;i++) cgram[i] = 0;
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
flush_tiledata_cache();
region = (system.region() == System::Region::NTSC ? 0 : 1); //0 = NTSC, 1 = PAL
regs.ioamaddr = 0x0000;
regs.icgramaddr = 0x01ff;
//$2100
regs.display_disabled = true;
regs.display_brightness = 15;
//$2101
regs.oam_basesize = 0;
regs.oam_nameselect = 0;
regs.oam_tdaddr = 0x0000;
cache.oam_basesize = 0;
cache.oam_nameselect = 0;
cache.oam_tdaddr = 0x0000;
//$2102-$2103
regs.oam_baseaddr = 0x0000;
regs.oam_addr = 0x0000;
regs.oam_priority = false;
regs.oam_firstsprite = 0;
//$2104
regs.oam_latchdata = 0x00;
//$2105
regs.bg_tilesize[BG1] = 0;
regs.bg_tilesize[BG2] = 0;
regs.bg_tilesize[BG3] = 0;
regs.bg_tilesize[BG4] = 0;
regs.bg3_priority = 0;
regs.bg_mode = 0;
//$2106
regs.mosaic_size = 0;
regs.mosaic_enabled[BG1] = false;
regs.mosaic_enabled[BG2] = false;
regs.mosaic_enabled[BG3] = false;
regs.mosaic_enabled[BG4] = false;
regs.mosaic_countdown = 0;
//$2107-$210a
regs.bg_scaddr[BG1] = 0x0000;
regs.bg_scaddr[BG2] = 0x0000;
regs.bg_scaddr[BG3] = 0x0000;
regs.bg_scaddr[BG4] = 0x0000;
regs.bg_scsize[BG1] = SC_32x32;
regs.bg_scsize[BG2] = SC_32x32;
regs.bg_scsize[BG3] = SC_32x32;
regs.bg_scsize[BG4] = SC_32x32;
//$210b-$210c
regs.bg_tdaddr[BG1] = 0x0000;
regs.bg_tdaddr[BG2] = 0x0000;
regs.bg_tdaddr[BG3] = 0x0000;
regs.bg_tdaddr[BG4] = 0x0000;
//$210d-$2114
regs.bg_ofslatch = 0x00;
regs.m7_hofs = regs.m7_vofs = 0x0000;
regs.bg_hofs[BG1] = regs.bg_vofs[BG1] = 0x0000;
regs.bg_hofs[BG2] = regs.bg_vofs[BG2] = 0x0000;
regs.bg_hofs[BG3] = regs.bg_vofs[BG3] = 0x0000;
regs.bg_hofs[BG4] = regs.bg_vofs[BG4] = 0x0000;
//$2115
regs.vram_incmode = 1;
regs.vram_mapping = 0;
regs.vram_incsize = 1;
//$2116-$2117
regs.vram_addr = 0x0000;
//$211a
regs.mode7_repeat = 0;
regs.mode7_vflip = false;
regs.mode7_hflip = false;
//$211b-$2120
regs.m7_latch = 0x00;
regs.m7a = 0x0000;
regs.m7b = 0x0000;
regs.m7c = 0x0000;
regs.m7d = 0x0000;
regs.m7x = 0x0000;
regs.m7y = 0x0000;
//$2121
regs.cgram_addr = 0x0000;
//$2122
regs.cgram_latchdata = 0x00;
//$2123-$2125
regs.window1_enabled[BG1] = false;
regs.window1_enabled[BG2] = false;
regs.window1_enabled[BG3] = false;
regs.window1_enabled[BG4] = false;
regs.window1_enabled[OAM] = false;
regs.window1_enabled[COL] = false;
regs.window1_invert [BG1] = false;
regs.window1_invert [BG2] = false;
regs.window1_invert [BG3] = false;
regs.window1_invert [BG4] = false;
regs.window1_invert [OAM] = false;
regs.window1_invert [COL] = false;
regs.window2_enabled[BG1] = false;
regs.window2_enabled[BG2] = false;
regs.window2_enabled[BG3] = false;
regs.window2_enabled[BG4] = false;
regs.window2_enabled[OAM] = false;
regs.window2_enabled[COL] = false;
regs.window2_invert [BG1] = false;
regs.window2_invert [BG2] = false;
regs.window2_invert [BG3] = false;
regs.window2_invert [BG4] = false;
regs.window2_invert [OAM] = false;
regs.window2_invert [COL] = false;
//$2126-$2129
regs.window1_left = 0x00;
regs.window1_right = 0x00;
regs.window2_left = 0x00;
regs.window2_right = 0x00;
//$212a-$212b
regs.window_mask[BG1] = 0;
regs.window_mask[BG2] = 0;
regs.window_mask[BG3] = 0;
regs.window_mask[BG4] = 0;
regs.window_mask[OAM] = 0;
regs.window_mask[COL] = 0;
//$212c-$212d
regs.bg_enabled[BG1] = false;
regs.bg_enabled[BG2] = false;
regs.bg_enabled[BG3] = false;
regs.bg_enabled[BG4] = false;
regs.bg_enabled[OAM] = false;
regs.bgsub_enabled[BG1] = false;
regs.bgsub_enabled[BG2] = false;
regs.bgsub_enabled[BG3] = false;
regs.bgsub_enabled[BG4] = false;
regs.bgsub_enabled[OAM] = false;
//$212e-$212f
regs.window_enabled[BG1] = false;
regs.window_enabled[BG2] = false;
regs.window_enabled[BG3] = false;
regs.window_enabled[BG4] = false;
regs.window_enabled[OAM] = false;
regs.sub_window_enabled[BG1] = false;
regs.sub_window_enabled[BG2] = false;
regs.sub_window_enabled[BG3] = false;
regs.sub_window_enabled[BG4] = false;
regs.sub_window_enabled[OAM] = false;
//$2130
regs.color_mask = 0;
regs.colorsub_mask = 0;
regs.addsub_mode = false;
regs.direct_color = false;
//$2131
regs.color_mode = 0;
regs.color_halve = false;
regs.color_enabled[BACK] = false;
regs.color_enabled[OAM] = false;
regs.color_enabled[BG4] = false;
regs.color_enabled[BG3] = false;
regs.color_enabled[BG2] = false;
regs.color_enabled[BG1] = false;
//$2132
regs.color_r = 0x00;
regs.color_g = 0x00;
regs.color_b = 0x00;
regs.color_rgb = 0x0000;
//$2133
regs.mode7_extbg = false;
regs.pseudo_hires = false;
regs.overscan = false;
regs.scanlines = 224;
regs.oam_interlace = false;
regs.interlace = false;
//$2137
regs.hcounter = 0;
regs.vcounter = 0;
regs.latch_hcounter = 0;
regs.latch_vcounter = 0;
regs.counters_latched = false;
//$2139-$213a
regs.vram_readbuffer = 0x0000;
//$213e
regs.time_over = false;
regs.range_over = false;
reset();
}
void PPU::reset() {
create(Enter, system.cpu_frequency());
PPUcounter::reset();
memset(surface, 0, 512 * 512 * sizeof(uint32));
snes: ppu: state out similarly to apu. this was a very simple project; unlike the apu, there aren't many sync points. like the apu, a message is dumped to the console if runtosave causes determinism problems. like the apu, there's no speed hit, but tales of phantasia is still broken. breaks savesates.
2012-12-24 19:49:23 +00:00
uindex = 0;
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
libsnes-add missing variable initializations for ppu/cpu/dsp/smp components. every one of them was fundamentally untasworthy.
2012-12-01 08:29:47 +00:00
//zero 01-dec-2012 - gotta reset these sometime, somewhere
memset(oam_itemlist, 0, sizeof(oam_itemlist));
memset(oam_tilelist, 0, sizeof(oam_tilelist));
memset(oam_line_pal, 0, sizeof(oam_line_pal));
memset(oam_line_pri, 0, sizeof(oam_line_pri));
active_sprite = sprite_list_valid = 0;
memset(bg_info, 0, sizeof(bg_info));
memset(window, 0, sizeof(window));
memset(pixel_cache, 0, sizeof(pixel_cache));
regs.oam_tilecount = regs.oam_itemcount = 0;
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
frame();
//$2100
regs.display_disabled = true;
display.interlace = false;
display.overscan = false;
regs.scanlines = 224;
memset(sprite_list, 0, sizeof(sprite_list));
sprite_list_valid = false;
//open bus support
regs.ppu1_mdr = 0xff;
regs.ppu2_mdr = 0xff;
//bg line counters
regs.bg_y[0] = 0;
regs.bg_y[1] = 0;
regs.bg_y[2] = 0;
regs.bg_y[3] = 0;
}
void PPU::layer_enable(unsigned layer, unsigned priority, bool enable) {
switch(layer * 4 + priority) {
case 0: layer_enabled[BG1][0] = enable; break;
case 1: layer_enabled[BG1][1] = enable; break;
case 4: layer_enabled[BG2][0] = enable; break;
case 5: layer_enabled[BG2][1] = enable; break;
case 8: layer_enabled[BG3][0] = enable; break;
case 9: layer_enabled[BG3][1] = enable; break;
case 12: layer_enabled[BG4][0] = enable; break;
case 13: layer_enabled[BG4][1] = enable; break;
case 16: layer_enabled[OAM][0] = enable; break;
case 17: layer_enabled[OAM][1] = enable; break;
case 18: layer_enabled[OAM][2] = enable; break;
case 19: layer_enabled[OAM][3] = enable; break;
}
}
void PPU::set_frameskip(unsigned frameskip_) {
frameskip = frameskip_;
framecounter = 0;
}
switch snes core back to external process. more refined this time. support use of performance core.
2012-12-25 20:36:04 +00:00
PPU::PPU()
: vram(nullptr)
, oam(nullptr)
, cgram(nullptr)
{
}
void PPU::initialize()
{
vram = (uint8*)interface()->allocSharedMemory("VRAM",128 * 1024);
oam = (uint8*)interface()->allocSharedMemory("OAM",544);
cgram = (uint8*)interface()->allocSharedMemory("CGRAM",512);
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
surface = new uint32[512 * 512];
output = surface + 16 * 512;
alloc_tiledata_cache();
for(unsigned l = 0; l < 16; l++) {
for(unsigned i = 0; i < 4096; i++) {
mosaic_table[l][i] = (i / (l + 1)) * (l + 1);
}
}
layer_enabled[BG1][0] = true;
layer_enabled[BG1][1] = true;
layer_enabled[BG2][0] = true;
layer_enabled[BG2][1] = true;
layer_enabled[BG3][0] = true;
layer_enabled[BG3][1] = true;
layer_enabled[BG4][0] = true;
layer_enabled[BG4][1] = true;
layer_enabled[OAM][0] = true;
layer_enabled[OAM][1] = true;
layer_enabled[OAM][2] = true;
layer_enabled[OAM][3] = true;
frameskip = 0;
framecounter = 0;
}
PPU::~PPU() {
delete[] surface;
free_tiledata_cache();
switch snes core back to external process. more refined this time. support use of performance core.
2012-12-25 20:36:04 +00:00
interface()->freeSharedMemory(vram);
interface()->freeSharedMemory(oam);
interface()->freeSharedMemory(cgram);
bsneshawk step 1 of N - compile libsnes, make bsneshawk core, setup interop, support frameadvance, video, gamepad. games are playable, I think.
2012-09-04 00:20:36 +00:00
}
}