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crospang.cpp: Correct clock speeds based on OSC & PCB info.

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68000P10 is a 10MHz part,  so it's not going to be overclocked to 14.318MHz

All PCBs on this platform have only a single 14.31818MHz OSC so the Oki clock is either ~1.7MHz (OSC/8) or ~.89MHz (OSC/16)
This commit is contained in:
braintro 2018-03-09 20:16:22 -06:00
parent 9381cc26f2
commit c216915462
1 changed files with 4 additions and 4 deletions
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8
src/mame/drivers/crospang.cpp
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@ -338,11 +338,11 @@ void crospang_state::machine_reset()
MACHINE_CONFIG_START(crospang_state::crospang)
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M68000, 14318180)
MCFG_CPU_ADD("maincpu", M68000, XTAL(14'318'180)/2) /* 68000P10 @ 7.15909MHz */
MCFG_CPU_PROGRAM_MAP(crospang_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", crospang_state, irq6_line_hold)
MCFG_CPU_ADD("audiocpu", Z80, 14318180/4)
MCFG_CPU_ADD("audiocpu", Z80, XTAL(14'318'180)/4) /* 3.579545MHz */
MCFG_CPU_PROGRAM_MAP(crospang_sound_map)
MCFG_CPU_IO_MAP(crospang_sound_io_map)
@ -373,11 +373,11 @@ MACHINE_CONFIG_START(crospang_state::crospang)
MCFG_GENERIC_LATCH_8_ADD("soundlatch")
MCFG_SOUND_ADD("ymsnd", YM3812, 14318180/4)
MCFG_SOUND_ADD("ymsnd", YM3812, XTAL(14'318'180)/4) /* 3.579545MHz */
MCFG_YM3812_IRQ_HANDLER(INPUTLINE("audiocpu", 0))
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MCFG_OKIM6295_ADD("oki", 1056000, PIN7_HIGH) // clock frequency & pin 7 not verified
MCFG_OKIM6295_ADD("oki", XTAL(14'318'180)/16, PIN7_HIGH) // 1.789772MHz or 0.894886MHz?? & pin 7 not verified
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END