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Joker's Wild: bypassed the rng test [Angelo Salese]

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This commit is contained in:
Angelo Salese 2009-11-29 21:54:34 +00:00
parent d638e3b6b3
commit 8be42ffeeb
1 changed files with 12 additions and 6 deletions
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18
src/mame/drivers/jokrwild.c
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@ -162,10 +162,16 @@ static PALETTE_INIT( jokrwild )
* Read/Write Handlers *
*****************************/
//static READ8_HANDLER( random_gen_r )
//{
// return mame_rand(machine) & 0xff;
//}
static READ8_HANDLER( rng_r )
{
if(cpu_get_pc(space->cpu) == 0xab32)
return (offset == 0) ? 0x9e : 0x27;
if(cpu_get_pc(space->cpu) == 0xab3a)
return (offset == 2) ? 0x49 : 0x92;
return mame_rand(space->machine) & 0xff;
}
/*************************
@ -182,7 +188,7 @@ static ADDRESS_MAP_START( jokrwild_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x6000, 0x6000) AM_DEVWRITE("crtc", mc6845_address_w)
AM_RANGE(0x6001, 0x6001) AM_DEVREADWRITE("crtc", mc6845_register_r, mc6845_register_w)
// AM_RANGE(0x6100, 0x6100) AM_READWRITENOP /* R/W ???? */
// AM_RANGE(0x6200, 0x6203) another PIA?
AM_RANGE(0x6200, 0x6203) AM_READ(rng_r)//another PIA?
// AM_RANGE(0x6300, 0x6300) unknown
AM_RANGE(0x8000, 0xffff) AM_ROM
ADDRESS_MAP_END
@ -366,7 +372,7 @@ static const mc6845_interface mc6845_intf =
static MACHINE_DRIVER_START( jokrwild )
/* basic machine hardware */
MDRV_CPU_ADD("maincpu", M6809, MASTER_CLOCK/8) /* guess */
MDRV_CPU_ADD("maincpu", M6809, MASTER_CLOCK/2) /* guess */
MDRV_CPU_PROGRAM_MAP(jokrwild_map)
MDRV_CPU_VBLANK_INT("screen", nmi_line_pulse)