+/*
+ * SMS emulation
+ * (C) notaz, 2009-2010
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
/*
* TODO:
* - start in a state as if BIOS ran
* - remaining status flags (OVR/COL)
* - RAM support in mapper
* - region support
- * - Pause button (NMI)
* - SN76496 DAC-like usage
* - H counter
*/
#include "pico_int.h"
+#include "memory.h"
#include "sound/sn76496.h"
static unsigned char vdp_data_read(void)
break;
case 0xc1: /* I/O port B and miscellaneous */
- d = (Pico.sms_io_ctl & 0x80) | ((Pico.sms_io_ctl << 1) & 0x40) | 0x30;
+ d = (Pico.ms.io_ctl & 0x80) | ((Pico.ms.io_ctl << 1) & 0x40) | 0x30;
d |= ~(PicoPad[1] >> 2) & 0x0f;
break;
}
switch (a)
{
case 0x01:
- Pico.sms_io_ctl = d;
+ Pico.ms.io_ctl = d;
break;
case 0x40:
d &= bank_mask;
z80_map_set(z80_read_map, 0x4000, 0x7fff, Pico.rom + (d << 14), 0);
#ifdef _USE_CZ80
- Cz80_Set_Fetch(&CZ80, 0x4000, 0x7fff, (UINT32)Pico.rom + (d << 14));
+ Cz80_Set_Fetch(&CZ80, 0x4000, 0x7fff, (FPTR)Pico.rom + (d << 14));
#endif
break;
case 0x0f:
d &= bank_mask;
z80_map_set(z80_read_map, 0x8000, 0xbfff, Pico.rom + (d << 14), 0);
#ifdef _USE_CZ80
- Cz80_Set_Fetch(&CZ80, 0x8000, 0xbfff, (UINT32)Pico.rom + (d << 14));
+ Cz80_Set_Fetch(&CZ80, 0x8000, 0xbfff, (FPTR)Pico.rom + (d << 14));
#endif
break;
}
+ Pico.ms.carthw[a & 0x0f] = d;
}
-static void MEMH_FUNC xwrite(unsigned int a, unsigned char d)
+static void xwrite(unsigned int a, unsigned char d)
{
elprintf(EL_IO, "z80 write [%04x] %02x", a, d);
if (a >= 0xc000)
Pico.zram[a & 0x1fff] = d;
- if (a >= 0xfff0)
+ if (a >= 0xfff8)
write_bank(a, d);
}
{
int s, tmp;
- memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);
+ memset(&Pico.ram,0,(unsigned char *)&Pico.rom - Pico.ram);
memset(&Pico.video,0,sizeof(Pico.video));
memset(&Pico.m,0,sizeof(Pico.m));
Pico.m.pal = 0;
tmp = 1 << s;
bank_mask = (tmp - 1) >> 14;
+ Pico.ms.carthw[0x0e] = 1;
+ Pico.ms.carthw[0x0f] = 2;
+
PicoReset();
}
drZ80.z80_out = z80_sms_out;
#endif
#ifdef _USE_CZ80
- Cz80_Set_Fetch(&CZ80, 0x0000, 0xbfff, (UINT32)Pico.rom);
- Cz80_Set_Fetch(&CZ80, 0xc000, 0xdfff, (UINT32)Pico.zram);
- Cz80_Set_Fetch(&CZ80, 0xe000, 0xffff, (UINT32)Pico.zram);
+ Cz80_Set_Fetch(&CZ80, 0x0000, 0xbfff, (FPTR)Pico.rom);
+ Cz80_Set_Fetch(&CZ80, 0xc000, 0xdfff, (FPTR)Pico.zram);
+ Cz80_Set_Fetch(&CZ80, 0xe000, 0xffff, (FPTR)Pico.zram);
Cz80_Set_INPort(&CZ80, z80_sms_in);
Cz80_Set_OUTPort(&CZ80, z80_sms_out);
#endif
}
+void PicoStateLoadedMS(void)
+{
+ write_bank(0xfffe, Pico.ms.carthw[0x0e]);
+ write_bank(0xffff, Pico.ms.carthw[0x0f]);
+}
+
void PicoFrameMS(void)
{
struct PicoVideo *pv = &Pico.video;
int skip = PicoSkipFrame;
int lines_vis = 192;
int hint; // Hint counter
+ int nmi;
int y;
+ nmi = (PicoPad[0] >> 7) & 1;
+ if (!Pico.ms.nmi_state && nmi)
+ z80_nmi();
+ Pico.ms.nmi_state = nmi;
+
PicoFrameStartMode4();
hint = pv->reg[0x0a];
for (y = 0; y < lines; y++)
{
pv->v_counter = Pico.m.scanline = y;
+ if (y > 218)
+ pv->v_counter = y - 6;
if (y < lines_vis && !skip)
PicoLineMode4(y);