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md, minor cleanup for region code handling

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This commit is contained in:
kub 2024-06-15 09:28:04 +00:00
parent 6a996613a9
commit 7cbd42bc54
2 changed files with 7 additions and 5 deletions
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4
pico/cart.c
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@ -1341,10 +1341,6 @@ static void PicoCartDetect(const char *carthw_cfg)
memset(Pico.sv.data, 0xff, Pico.sv.size); memset(Pico.sv.data, 0xff, Pico.sv.size);
} }
// Unusual region 'code'
if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)
*(u32 *) (Pico.rom + 0x1f0) = CPU_LE4(0x20204520);
// tweak for Blackthorne: master SH2 overwrites stack of slave SH2 being in PWM // tweak for Blackthorne: master SH2 overwrites stack of slave SH2 being in PWM
// interrupt. On real hardware, nothing happens since slave fetches the values // interrupt. On real hardware, nothing happens since slave fetches the values
// it has written from its cache, but picodrive doesn't emulate caching. // it has written from its cache, but picodrive doesn't emulate caching.

8
pico/pico.c
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@ -97,15 +97,21 @@ PICO_INTERNAL void PicoDetectRegion(void)
{ {
int support=0, hw=0, i; int support=0, hw=0, i;
unsigned char pal=0; unsigned char pal=0;
char *pr = (char *)(Pico.rom + 0x1f0);
if (PicoIn.regionOverride) if (PicoIn.regionOverride)
{ {
support = PicoIn.regionOverride; support = PicoIn.regionOverride;
} }
else if (strcmp(pr, "EUROPE") == 0 || strcmp(pr, "Europe") == 0)
{
// Unusual cartridge region 'code'
support|=8;
}
else else
{ {
// Read cartridge region data: // Read cartridge region data:
unsigned short *rd = (unsigned short *)(Pico.rom + 0x1f0); unsigned short *rd = (unsigned short *)pr;
int region = (rd[0] << 16) | rd[1]; int region = (rd[0] << 16) | rd[1];
for (i = 0; i < 4; i++) for (i = 0; i < 4; i++)