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Written a per-pixel function for the irq system in the ST-V driver, disabled by default [Angelo Salese]

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Angelo Salese 2010-03-10 02:07:06 +00:00
parent 63f65e901b
commit a8b0ba8abc
1 changed files with 43 additions and 1 deletions
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44
src/mame/drivers/stv.c
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@ -2573,7 +2573,49 @@ SCU register[36] is the timer zero compare register.
SCU register[40] is for IRQ masking.
*/
/* to do, update bios idle skips so they work better with this arrangement.. */
#ifdef UNUSED_FUNCTION
/* theoretical function about how this irq system should work, not yet implemented because the performance speed hits very very badly.
It's not tested much either, but I'm aware that timer 1 doesn't work with this for whatever reason ... */
static TIMER_CALLBACK( stv_irq_callback )
{
int hpos = video_screen_get_hpos(machine->primary_screen);
int vpos = video_screen_get_vpos(machine->primary_screen);
rectangle visarea = *video_screen_get_visible_area(machine->primary_screen);
h_sync = visarea.max_x+1;//horz
v_sync = visarea.max_y+1;//vert
if(vpos == v_sync && hpos == 0)
VBLANK_IN_IRQ;
if(hpos == 0 && vpos == 0)
VBLANK_OUT_IRQ;
if(hpos == h_sync)
TIMER_0_IRQ;
if(hpos == h_sync && (vpos != 0 && vpos != v_sync))
{
HBLANK_IN_IRQ;
timer_0++;
}
/*TODO: timing of this one (related to the VDP1 speed)*/
/* (NOTE: value shouldn't be at h_sync/v_sync position (will break shienryu))*/
if(hpos == 40 && vpos == 0)
VDP1_IRQ;
if(hpos == timer_1)
TIMER_1_IRQ;
if(hpos <= h_sync)
timer_adjust_oneshot(scan_timer, video_screen_get_time_until_pos(machine->primary_screen, vpos, hpos+1), 0);
else if(vpos <= v_sync)
timer_adjust_oneshot(scan_timer, video_screen_get_time_until_pos(machine->primary_screen, vpos+1, 0), 0);
else
timer_adjust_oneshot(scan_timer, video_screen_get_time_until_pos(machine->primary_screen, 0, 0), 0);
}
#endif
static running_device *vblank_out_timer,*scan_timer,*t1_timer;
static int h_sync,v_sync;