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Some mirderby progresses, not worth mentioning

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This commit is contained in:
Angelo Salese 2010-06-02 00:21:28 +00:00
parent 9298a8447f
commit fc683a0aeb
1 changed files with 36 additions and 1 deletions
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37
src/mame/drivers/mirderby.c
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@ -62,10 +62,36 @@ static ADDRESS_MAP_START( cpu0_map, ADDRESS_SPACE_PROGRAM, 8 )
ADDRESS_MAP_END
static ADDRESS_MAP_START( cpu1_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0xffff) AM_ROM
AM_RANGE(0x0000, 0x3fff) AM_RAM // videoram
AM_RANGE(0x4000, 0x5fff) AM_RAM
AM_RANGE(0x6000, 0x6fff) AM_RAM /* work ram */
AM_RANGE(0x7000, 0x77ff) AM_RAM
//0x7ff0 onward is the blitter
AM_RANGE(0x7ffe, 0x7ffe) AM_READNOP //watchdog
AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END
static UINT8 prot_data;
static READ8_HANDLER( mirderby_prot_r )
{
prot_data&=0x7f;
return prot_data++;
}
static WRITE8_HANDLER( mirderby_prot_w )
{
prot_data = data;
}
static ADDRESS_MAP_START( cpu2_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x3fff) AM_RAM // videoram
AM_RANGE(0x4000, 0x5fff) AM_RAM
AM_RANGE(0x6000, 0x6fff) AM_RAM /* work ram */
AM_RANGE(0x7000, 0x77ff) AM_RAM
AM_RANGE(0x7800, 0x7800) AM_READWRITE(mirderby_prot_r, mirderby_prot_w) // protection check?
AM_RANGE(0x7ffe, 0x7ffe) AM_READNOP //watchdog
AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END
@ -102,14 +128,23 @@ static GFXDECODE_START( mirderby )
GFXDECODE_ENTRY( "gfx2", 0, char_layout, 0x0000, 0x10 )
GFXDECODE_END
static INTERRUPT_GEN( mirderby_irq )
{
cpu_set_input_line(device, M6809_FIRQ_LINE, HOLD_LINE);
}
static MACHINE_DRIVER_START( mirderby )
/* basic machine hardware */
MDRV_CPU_ADD("cpu0", Z80, 16000000/4) /* 4 Mhz */
MDRV_CPU_FLAGS(CPU_DISABLE)
MDRV_CPU_PROGRAM_MAP(cpu0_map)
MDRV_CPU_ADD("cpu1", M6809, 16000000/8) /* 2 Mhz */
MDRV_CPU_PROGRAM_MAP(cpu1_map)
MDRV_CPU_FLAGS(CPU_DISABLE)
MDRV_CPU_VBLANK_INT("screen", mirderby_irq)
MDRV_CPU_ADD("cpu2", M6809, 16000000/8) /* 2 Mhz */
MDRV_CPU_PROGRAM_MAP(cpu2_map)