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sms, add sg-1000 on-cart RAM mapping

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kub 2022-02-27 11:12:15 +00:00
parent 3611781e65
commit 216c9f17fa
1 changed files with 5 additions and 4 deletions
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9
pico/sms.c
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@ -458,15 +458,16 @@ static void write_bank_jang(unsigned short a, unsigned char d)
static void write_bank_x8k(unsigned short a, unsigned char d) static void write_bank_x8k(unsigned short a, unsigned char d)
{ {
// 8KB address range @ 0x2000 // 8KB address range @ 0x2000
if ((a&0xe000) != 0x2000) return; if ((a&0xe000) != 0x2000 && (a&0xe000) != 0x8000) return;
// this is only available on SG-1000 // this is only available on SG-1000
if (Pico.ms.mapper != PMS_MAP_8KBRAM && (Pico.ms.mapper || !(Pico.m.hardware & PMS_HW_SG))) return; if (Pico.ms.mapper != PMS_MAP_8KBRAM && (Pico.ms.mapper || !(Pico.m.hardware & PMS_HW_SG))) return;
elprintf(EL_Z80BNK, "bank x8k %04x %02x @ %04x", a, d, z80_pc()); elprintf(EL_Z80BNK, "bank x8k %04x %02x @ %04x", a, d, z80_pc());
Pico.ms.mapper = PMS_MAP_8KBRAM; Pico.ms.mapper = PMS_MAP_8KBRAM;
((unsigned char *)PicoMem.vram)[a+0x6000] = d; ((unsigned char *)PicoMem.vram)[(a&0x1fff)+0x8000] = d;
z80_map_set(z80_read_map, 0x2000, 0x3fff, PicoMem.vram+0x4000, 0); a &= 0xe000;
z80_map_set(z80_write_map, 0x2000, 0x3fff, PicoMem.vram+0x4000, 0); z80_map_set(z80_read_map, a, a+0x1fff, PicoMem.vram+0x4000, 0);
z80_map_set(z80_write_map, a, a+0x1fff, PicoMem.vram+0x4000, 0);
} }
// TODO auto-selecting is not really reliable. // TODO auto-selecting is not really reliable.