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sms, minor fixes (vdp mode switch, zram init)

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kub 2021-10-24 22:51:16 +02:00
parent 1c70532fc2
commit 1603058a88
2 changed files with 17 additions and 6 deletions
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12
pico/sms.c
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@ -1,6 +1,7 @@
/*
* SMS emulation
* (C) notaz, 2009-2010
* (C) kub, 2021
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
@ -149,10 +150,10 @@ static unsigned char z80_sms_in(unsigned short a)
case 0x01:
if ((Pico.m.hardware & 0x1) && a < 0x8) { // GG I/O area
switch (a) {
case 0: d = 0xff & ~(PicoIn.pad[0] & 0x80); break;
case 1: d = Pico.ms.io_gg[1] | Pico.ms.io_gg[2]; break;
case 5: d = Pico.ms.io_gg[5] & 0xf8; break;
default: d = Pico.ms.io_gg[a]; break;
case 0: d = 0xff & ~(PicoIn.pad[0] & 0x80); break;
case 1: d = Pico.ms.io_gg[1] | (Pico.ms.io_gg[2] & 0x7f); break;
case 5: d = Pico.ms.io_gg[5] & 0xf8; break;
default: d = Pico.ms.io_gg[a]; break;
}
}
break;
@ -398,6 +399,9 @@ void PicoPowerMS(void)
memset(&Pico.m,0,sizeof(Pico.m));
Pico.m.pal = 0;
for (s = 0; s < sizeof(PicoMem.zram); s++)
PicoMem.zram[s] = rand();
// calculate a mask for bank writes.
// ROM loader has aligned the size for us, so this is safe.
s = 0; tmp = Pico.romsize;