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Rewrote timer code.

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The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
This commit is contained in:
SarahW 2018-08-02 22:06:10 +01:00
commit a7d006b637
79 changed files with 1050 additions and 1033 deletions
Download patch file Download diff file Expand all files Collapse all files

16
src/vid_ega.c
View file

@ -241,10 +241,10 @@ void ega_recalctimings(ega_t *ega)
_dispontime *= crtcconst;
_dispofftime *= crtcconst;
ega->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
ega->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
pclog("dispontime %i (%f) dispofftime %i (%f)\n", ega->dispontime, (float)ega->dispontime / (1 << TIMER_SHIFT),
ega->dispofftime, (float)ega->dispofftime / (1 << TIMER_SHIFT));
ega->dispontime = (uint64_t)_dispontime;
ega->dispofftime = (uint64_t)_dispofftime;
pclog("dispontime %i (%f) dispofftime %i (%f)\n", ega->dispontime, (float)ega->dispontime,
ega->dispofftime, (float)ega->dispofftime);
// printf("EGA horiz total %i display end %i clock rate %i vidclock %i %i\n",crtc[0],crtc[1],egaswitchread,vidclock,((ega3c2>>2)&3) | ((tridentnewctrl2<<2)&4));
// printf("EGA vert total %i display end %i max row %i vsync %i\n",ega_vtotal,ega_dispend,(crtc[9]&31)+1,ega_vsyncstart);
// printf("total %f on %f cycles off %f cycles frame %f sec %f %02X\n",disptime*crtcconst,dispontime,dispofftime,(dispontime+dispofftime)*ega_vtotal,(dispontime+dispofftime)*ega_vtotal*70,seqregs[1]);
@ -500,7 +500,7 @@ void ega_poll(void *p)
if (!ega->linepos)
{
ega->vidtime += ega->dispofftime;
timer_advance_u64(&ega->timer, ega->dispofftime);
ega->stat |= 1;
ega->linepos = 1;
@ -567,7 +567,7 @@ void ega_poll(void *p)
}
else
{
ega->vidtime += ega->dispontime;
timer_advance_u64(&ega->timer, ega->dispontime);
// if (output) printf("Display on %f\n",vidtime);
if (ega->dispon)
ega->stat &= ~1;
@ -983,6 +983,8 @@ void ega_init(ega_t *ega, int monitor_type, int is_mono)
egaswitches = monitor_type & 0xf;
ega->vram_limit = 256 * 1024;
ega->vrammask = ega->vram_limit-1;
timer_add(&ega->timer, ega_poll, ega, 1);
}
void *ega_standalone_init()
@ -1013,8 +1015,8 @@ void *ega_standalone_init()
ega->vrammask = ega->vram_limit-1;
mem_mapping_add(&ega->mapping, 0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, NULL, MEM_MAPPING_EXTERNAL, ega);
timer_add(ega_poll, &ega->vidtime, TIMER_ALWAYS_ENABLED, ega);
io_sethandler(0x03a0, 0x0040, ega_in, NULL, NULL, ega_out, NULL, NULL, ega);
return ega;
}