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sms, add basic sg-1000 support

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This commit is contained in:
kub 2022-02-26 10:19:07 +00:00
parent 22917adcff
commit aaef4b945e
5 changed files with 14 additions and 5 deletions
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11
pico/sms.c
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@ -454,6 +454,14 @@ static void write_bank_jang(unsigned short a, unsigned char d)
}
}
static void write_bank_x8k(unsigned short a, unsigned char d)
{
if ((a&0xe000) != 0x2000) return;
((unsigned char *)PicoMem.vram)[a+0x6000] = d;
z80_map_set(z80_read_map, 0x2000, 0x3fff, PicoMem.vram+0x4000, 0);
z80_map_set(z80_write_map, 0x2000, 0x3fff, PicoMem.vram+0x4000, 0);
}
// TODO auto-selecting is not really reliable.
// Before adding more mappers this should be revised.
static void xwrite(unsigned int a, unsigned char d)
@ -480,11 +488,12 @@ static void xwrite(unsigned int a, unsigned char d)
write_bank_codem(a, d);
write_bank_korea(a, d);
write_bank_n16k(a, d);
write_bank_x8k(a, d);
break;
}
}
// TMR product codes and hardware type for know 50Hz-only games */
// TMR product codes and hardware type for know 50Hz-only games
static u32 region_pal[] = { // cf. GX+, core/cart_hw/sms_cartc.c
0x40207067 /* Addams Family */, 0x40207020 /* Back.Future 3 */,
0x40207058 /* Battlemaniacs */, 0x40007105 /* Cal.Games 2 */,