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avgdvg: Fixed mametesters bug 03634. Reduced flickering in Tempest/Quantum. [Mathis Rosenhauer]

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This commit is contained in:
Mathis Rosenhauer 2010-02-25 13:31:10 +00:00
parent acf08c5b70
commit e32607b73e
1 changed files with 22 additions and 11 deletions
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33
src/mame/video/avgdvg.c
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@ -173,7 +173,11 @@ static void avg_apply_flipping(int *x, int *y)
static void vg_flush (running_machine *machine)
{
int i;
int i = 0;
while (vectbuf[i].status == VGCLIP)
i++;
vector_add_point(machine, vectbuf[i].x, vectbuf[i].y, vectbuf[i].color, 0);
for (i = 0; i < nvect; i++)
{
@ -1131,6 +1135,19 @@ static void avg_vggo(vgdata *vg)
vg->sp = 0;
}
static void tempest_vggo(vgdata *vg)
{
vg->pc = 0;
vg->sp = 0;
/*
* Tempest and Quantum trigger VGGO from time to time even though
* the VG runs in an endless loop for these games (see
* avg_common_strobe2). If we don't discard all vectors in the
* current buffer at this point, the screen starts flickering.
*/
nvect = 0;
}
static void dvg_vggo(vgdata *vg)
{
vg->dvy = 0;
@ -1221,13 +1238,6 @@ static TIMER_CALLBACK( run_state_machine )
*
************************************/
#ifdef UNUSED_FUNCTION
int avgdvg_done(void)
{
return vg->sync_halt;
}
#endif
CUSTOM_INPUT( avgdvg_done_r )
{
return vg->sync_halt ? 0x01 : 0x00;
@ -1235,6 +1245,8 @@ CUSTOM_INPUT( avgdvg_done_r )
WRITE8_HANDLER( avgdvg_go_w )
{
vgc->vggo(vg);
if (vg->sync_halt && (nvect > 10))
{
/*
@ -1246,7 +1258,6 @@ WRITE8_HANDLER( avgdvg_go_w )
}
vg_flush(space->machine);
vgc->vggo(vg);
vg_set_halt(0);
timer_adjust_oneshot(vg_run_timer, attotime_zero, 0);
}
@ -1372,7 +1383,7 @@ static const vgconf avg_tempest =
},
avg_state_addr,
avg_data,
avg_vggo,
tempest_vggo,
avg_vgrst
};
@ -1408,7 +1419,7 @@ static const vgconf avg_quantum =
},
avg_state_addr,
quantum_data,
avg_vggo,
tempest_vggo,
avg_vgrst
};