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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
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10
src/vid_compaq_cga.c
View file

@ -25,8 +25,8 @@ void compaq_cga_recalctimings(compaq_cga_t *self)
_dispofftime = disptime - _dispontime;
_dispontime *= MDACONST;
_dispofftime *= MDACONST;
self->cga.dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
self->cga.dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
self->cga.dispontime = (uint64_t)_dispontime;
self->cga.dispofftime = (uint64_t)_dispofftime;
}
void compaq_cga_poll(void *p)
@ -52,7 +52,7 @@ void compaq_cga_poll(void *p)
/* We are in Compaq 350-line CGA territory */
if (!self->cga.linepos)
{
self->cga.vidtime += self->cga.dispofftime;
timer_advance_u64(&self->cga.timer, self->cga.dispofftime);
self->cga.cgastat |= 1;
self->cga.linepos = 1;
oldsc = self->cga.sc;
@ -194,7 +194,7 @@ void compaq_cga_poll(void *p)
}
else
{
self->cga.vidtime += self->cga.dispontime;
timer_advance_u64(&self->cga.timer, self->cga.dispontime);
self->cga.linepos = 0;
if (self->cga.vsynctime)
{
@ -325,7 +325,7 @@ void *compaq_cga_init()
self->cga.vram = malloc(0x4000);
timer_add(compaq_cga_poll, &self->cga.vidtime, TIMER_ALWAYS_ENABLED, self);
timer_add(&self->cga.timer, compaq_cga_poll, self, 1);
mem_mapping_add(&self->cga.mapping, 0xb8000, 0x08000, cga_read, NULL, NULL, cga_write, NULL, NULL, NULL, MEM_MAPPING_EXTERNAL, self);
io_sethandler(0x03d0, 0x0010, cga_in, NULL, NULL, cga_out, NULL, NULL, self);