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Merge pull request #272 from dplewis/mbc

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Match GameBoy MBC
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Revo
2026-09-09 20:39:11 -04:00
committed by GitHub
parent d02e1da117 a401064c98
commit f0e2c58dec
1 changed files with 40 additions and 44 deletions
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84
src/gb_mbc.c
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@@ -63,51 +63,47 @@ s32 osGbmbcSelectRamBank(OSPfs* pfs, u8 bank) {
return ret;
}
#ifdef NON_MATCHING
s32 osGbmbcReadWrite(OSPfs* pfs, u16 flag, u32 address, u8* buffer, u32 size) {
s32 ret;
s32 var_s0;
u8 status;
u8 var_s2;
s32 osGbmbcReadWrite(OSPfs* pfs, u16 flag, u32 address, u8* buffer, u32 size) {
s32 ret;
s32 var_s0;
u8 status;
u8 var_s2;
ERRCK(osGbpakGetStatus(pfs, &status));
ERRCK(osGbpakGetStatus(pfs, &status));
var_s2 = (address >> 0xD);
if (var_s2 != D_800AA670[pfs->channel]) {
ERRCK(osGbmbcSelectRamBank(pfs, var_s2));
}
address &= 0x1FFF;
var_s0 = address + size;
while (var_s0 > MBC_ROM_BANK_ADDRESS) {
var_s0 -= MBC_ROM_BANK_ADDRESS;
ret = osGbpakReadWrite(pfs, flag, address + RAM_BASE_ADDRESS, buffer, MBC_ROM_BANK_ADDRESS - address);
if (ret != 0) {
goto end;
}
buffer = (buffer - address) + MBC_ROM_BANK_ADDRESS;
var_s2++;
ret = osGbmbcSelectRamBank(pfs, var_s2);
if (ret != 0) {
goto end;
}
size = var_s0;
address = 0;
if (0) { }
}
ret = osGbpakReadWrite(pfs, flag, address + RAM_BASE_ADDRESS, buffer, size);
var_s2 = address >> 0xD;
if (var_s2 != D_800AA670[pfs->channel]) {
ERRCK(osGbmbcSelectRamBank(pfs, var_s2));
}
address &= 0x1FFF;
var_s0 = address + size;
end:
if (ret == 0) {
ret = osGbpakGetStatus(pfs, &status);
}
if ((ret == 0) && !(status & 1)) {
ret = PFS_ERR_CONTRFAIL;
}
return ret;
while (1) {
if (var_s0 > MBC_ROM_BANK_ADDRESS) {
var_s0 -= MBC_ROM_BANK_ADDRESS;
ret = osGbpakReadWrite(pfs, flag, address + RAM_BASE_ADDRESS, buffer, MBC_ROM_BANK_ADDRESS - address);
if (ret != 0) {
break;
}
buffer = (buffer - address) + MBC_ROM_BANK_ADDRESS;
var_s2++;
ret = osGbmbcSelectRamBank(pfs, var_s2);
if (ret != 0) {
break;
}
size = var_s0;
address = 0;
} else {
ret = osGbpakReadWrite(pfs, flag, address + RAM_BASE_ADDRESS, buffer, size);
break;
}
}
if (ret == 0) {
ret = osGbpakGetStatus(pfs, &status);
}
if ((ret == 0) && !(status & 1)) {
ret = PFS_ERR_CONTRFAIL;
}
return ret;
}
#else
#pragma GLOBAL_ASM("asm/us/nonmatchings/gb_mbc/osGbmbcReadWrite.s")
#endif