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sms, minor fixes

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This commit is contained in:
kub 2021-10-21 20:44:55 +02:00
parent 02d250c709
commit d0cb6cfa57
2 changed files with 13 additions and 7 deletions
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12
pico/sms.c
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@ -295,6 +295,7 @@ static void write_bank_sega(unsigned short a, unsigned char d)
// 8KB ROM mapping for MSX mapper
static void write_bank_msx(unsigned short a, unsigned char d)
{
if (Pico.ms.mapper != 2 && (a|d) == 0) return;
elprintf(EL_Z80BNK, "bank 8k %04x %02x @ %04x", a, d, z80_pc());
Pico.ms.mapper = 2; // TODO define (more) mapper types
Pico.ms.carthw[a] = d;
@ -325,7 +326,7 @@ static void xwrite(unsigned int a, unsigned char d)
if (a == 0xa000 && Pico.ms.mapper != 2)
write_bank_sega(0xffff, d);
// MSX. 4 selectable 8KB banks at the top
if (a <= 0x0003 && Pico.ms.mapper != 1 && (a|d))
if (a <= 0x0003 && Pico.ms.mapper != 1)
write_bank_msx(a, d);
}
@ -476,15 +477,20 @@ void PicoFrameMS(void)
if (pv->reg[0] & 0x10) {
elprintf(EL_INTS, "hint");
z80_int_assert(1);
}
}
} else if (pv->pending_ints & 2) {
pv->pending_ints &= ~2;
z80_int_assert(0);
}
}
else if (y == lines_vis + 1) {
pv->pending_ints &= ~2;
pv->pending_ints |= 1;
if (pv->reg[1] & 0x20) {
elprintf(EL_INTS, "vint");
z80_int_assert(1);
}
} else
z80_int_assert(0);
}
cycles_aim += cycles_line;