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Rewrote timer code.

Browse source 
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
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13
src/vid_pc1512.c
View file

@ -35,7 +35,8 @@ typedef struct pc1512_t
int dispon;
int blink;
int dispontime, dispofftime, vidtime;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
int firstline, lastline;
uint8_t *vram;
@ -153,8 +154,8 @@ static void pc1512_recalctimings(pc1512_t *pc1512)
_dispontime *= CGACONST;
_dispofftime *= CGACONST;
// printf("Timings - on %f off %f frame %f second %f\n",dispontime,dispofftime,(dispontime+dispofftime)*262.0,(dispontime+dispofftime)*262.0*59.92);
pc1512->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
pc1512->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
pc1512->dispontime = (uint64_t)_dispontime;
pc1512->dispofftime = (uint64_t)_dispofftime;
}
static void pc1512_poll(void *p)
@ -171,7 +172,7 @@ static void pc1512_poll(void *p)
if (!pc1512->linepos)
{
pc1512->vidtime += pc1512->dispofftime;
timer_advance_u64(&pc1512->timer, pc1512->dispofftime);
pc1512->stat |= 1;
pc1512->linepos = 1;
oldsc = pc1512->sc;
@ -337,7 +338,7 @@ static void pc1512_poll(void *p)
}
else
{
pc1512->vidtime += pc1512->dispontime;
timer_advance_u64(&pc1512->timer, pc1512->dispontime);
if ((pc1512->lastline - pc1512->firstline) == 199)
pc1512->dispon = 0; /*Amstrad PC1512 always displays 200 lines, regardless of CRTC settings*/
if (pc1512->dispon)
@ -459,7 +460,7 @@ static void *pc1512_init()
pc1512->cgacol = 7;
pc1512->cgamode = 0x12;
timer_add(pc1512_poll, &pc1512->vidtime, TIMER_ALWAYS_ENABLED, pc1512);
timer_add(&pc1512->timer, pc1512_poll, pc1512, 1);
mem_mapping_add(&pc1512->mapping, 0xb8000, 0x08000, pc1512_read, NULL, NULL, pc1512_write, NULL, NULL, NULL, 0, pc1512);
io_sethandler(0x03d0, 0x0010, pc1512_in, NULL, NULL, pc1512_out, NULL, NULL, pc1512);
return pc1512;