ref: 75d6267a5f788162d92e7a5ae126cd8b0770aa8a
dir: /sys/src/games/snes/state.c/
#include <u.h> #include <libc.h> #include <thread.h> #include <draw.h> #include <bio.h> #include "dat.h" #include "fns.h" static Biobuf *bp; void put8(u8int i) { Bputc(bp, i); } void put16(u16int i) { put8(i); put8(i >> 8); } void put32(u32int i) { put8(i); put8(i >> 8); put8(i >> 16); put8(i >> 24); } void put16s(u16int *p, int n) { while(n--) put16(*p++); } int get8(void) { return Bgetc(bp); } int get16(void) { int i; i = get8(); i |= get8() << 8; return i; } int get32(void) { int i; i = get8(); i |= get8() << 8; i |= get8() << 16; i |= get8() << 24; return i; } void get16s(u16int *p, int n) { while(n--) *p++ = get16(); } void loadstate(char *file) { bp = Bopen(file, OREAD); if(bp == nil){ message("open: %r"); return; } Bread(bp, reg, sizeof(reg)); Bread(bp, mem, sizeof(mem)); Bread(bp, vram, sizeof(vram)); Bread(bp, oam, sizeof(oam)); Bread(bp, spcmem, sizeof(spcmem)); Bread(bp, dsp, sizeof(dsp)); get16s(cgram, nelem(cgram)); ppuclock = get32(); spcclock = get32(); dspclock = get32(); stimerclock = get32(); rA = get16(); rX = get16(); rY = get16(); rS = get16(); rP = get8(); rD = get16(); rDB = get8()<<16; pc = get16(); rPB = get8()<<16; emu = get8(); irq = get8(); nmi = get8(); dma = get8(); hdma = get32(); wai = get8(); mdr = get8(); mdr1 = get8(); mdr2 = get8(); oamaddr = get16(); vramlatch = get16(); keylatch = get32(); ppux = get16(); ppuy = get16(); htime = reg[0x4207] | reg[0x4208] << 8 & 0x100; vtime = reg[0x4209] | reg[0x420a] << 8 & 0x100; subcolor = get16(); get16s(hofs, nelem(hofs)); get16s(vofs, nelem(vofs)); get16s((u16int*) m7, nelem(m7)); sA = get8(); sX = get8(); sY = get8(); sS = get8(); sP = get8(); dspstate = get8(); dspcounter = get16(); noise = get16(); Bread(bp, spctimer, sizeof(spctimer)); dspload(); Bterm(bp); } void savestate(char *file) { flushram(); bp = Bopen(file, OWRITE); if(bp == nil){ message("open: %r"); return; } Bwrite(bp, reg, sizeof(reg)); Bwrite(bp, mem, sizeof(mem)); Bwrite(bp, vram, sizeof(vram)); Bwrite(bp, oam, sizeof(oam)); Bwrite(bp, spcmem, sizeof(spcmem)); Bwrite(bp, dsp, sizeof(dsp)); put16s(cgram, nelem(cgram)); put32(ppuclock); put32(spcclock); put32(dspclock); put32(stimerclock); put16(rA); put16(rX); put16(rY); put16(rS); put8(rP); put16(rD); put8(rDB>>16); put16(pc); put8(rPB>>16); put8(emu); put8(irq); put8(nmi); put8(dma); put32(hdma); put8(wai); put8(mdr); put8(mdr1); put8(mdr2); put16(oamaddr); put16(vramlatch); put32(keylatch); put16(ppux); put16(ppuy); put16(subcolor); put16s(hofs, nelem(hofs)); put16s(vofs, nelem(vofs)); put16s((u16int*) m7, nelem(m7)); put8(sA); put8(sX); put8(sY); put8(sS); put8(sP); put8(dspstate); put16(dspcounter); put16(noise); Bwrite(bp, spctimer, sizeof(spctimer)); dspsave(); Bterm(bp); }