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core, revisit Sega 8 bit hardware handling

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This commit is contained in:
kub 2023-02-22 23:22:45 +00:00
parent cab84f29e5
commit 0aa63fce12
9 changed files with 63 additions and 58 deletions
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8
pico/cart.c
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@ -847,7 +847,7 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
}
pdb_cleanup();
PicoIn.AHW &= PAHW_MCD|PAHW_SMS|PAHW_PICO;
PicoIn.AHW &= ~(PAHW_32X|PAHW_SVP);
PicoCartMemSetup = NULL;
PicoDmaHook = NULL;
@ -866,7 +866,7 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
PicoInitPico();
// setup correct memory map for loaded ROM
switch (PicoIn.AHW) {
switch (PicoIn.AHW & ~(PAHW_GG|PAHW_SG|PAHW_SC)) {
default:
elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoIn.AHW);
case 0:
@ -1353,7 +1353,7 @@ static void PicoCartDetect(const char *carthw_cfg)
for (i = 0; i < Pico.romsize; i += 4) {
unsigned v = CPU_BE2(*(u32 *) (Pico.rom + i));
if (a && v == a + 0x400) { // patch if 2 pointers with offset 0x400 are found
printf("auto-patching @%06x: %08x->%08x\n", i, v, v - 0x100);
elprintf(EL_STATUS, "auto-patching @%06x: %08x->%08x\n", i, v, v - 0x100);
*(u32 *) (Pico.rom + i) = CPU_BE2(v - 0x100);
}
// detect a pointer into the incriminating area
@ -1374,7 +1374,7 @@ static void PicoCartDetect(const char *carthw_cfg)
for (i = 0; i < Pico.romsize; i += 4) {
unsigned v = CPU_BE2(*(u32 *) (Pico.rom + i));
if (a == 0xffffff8c && v == 0x5ee1) { // patch if 4-long xfer written to CHCR
printf("auto-patching @%06x: %08x->%08x\n", i, v, v & ~0x800);
elprintf(EL_STATUS, "auto-patching @%06x: %08x->%08x\n", i, v, v & ~0x800);
*(u32 *) (Pico.rom + i) = CPU_BE2(v & ~0x800); // change to half-sized xfer
}
a = v;