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Pre-cache maincpu so we can efficiently query the PC in the speedup loop.

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This commit is contained in:
Aaron Giles 2010-06-14 08:06:11 +00:00
parent 8c2c643a7e
commit 55aa633c99
1 changed files with 5 additions and 3 deletions
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8
src/mame/drivers/gstream.c
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@ -132,7 +132,8 @@ public:
static void *alloc(running_machine &machine) { return auto_alloc_clear(&machine, gstream_state(machine)); }
gstream_state(running_machine &machine)
: oki_1(machine.device<okim6295_device>("oki1")),
: maincpu(machine.device<cpu_device>("maincpu")),
oki_1(machine.device<okim6295_device>("oki1")),
oki_2(machine.device<okim6295_device>("oki2")) { }
/* memory pointers */
@ -150,6 +151,7 @@ public:
int oki_bank_0, oki_bank_1;
/* devices */
cpu_device *maincpu;
okim6295_device *oki_1;
okim6295_device *oki_2;
};
@ -624,9 +626,9 @@ ROM_END
static READ32_HANDLER( gstream_speedup_r )
{
gstream_state *state = (gstream_state *)space->machine->driver_data;
if (cpu_get_pc(space->cpu) == 0xc0001592)
if (state->maincpu->state_value(STATE_GENPC) == 0xc0001592)
{
cpu_eat_cycles(space->cpu, 50);
state->maincpu->eat_cycles(50);
}
return state->workram[0xd1ee0 / 4];