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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
Download patch file Download diff file Expand all files Collapse all files

19
src/vid_olivetti_m24.c
View file

@ -33,7 +33,8 @@ typedef struct m24_t
uint16_t ma, maback;
int dispon;
int dispontime, dispofftime, vidtime;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
int firstline, lastline;
} m24_t;
@ -100,9 +101,11 @@ uint8_t m24_in(uint16_t addr, void *p)
void m24_write(uint32_t addr, uint8_t val, void *p)
{
m24_t *m24 = (m24_t *)p;
int offset = ((timer_get_remaining_u64(&m24->timer) / CGACONST) * 4) & 0xfc;
m24->vram[addr & 0x7FFF]=val;
m24->charbuffer[ ((int)(((m24->dispontime - m24->vidtime) * 2) / (CGACONST / 2))) & 0xfc] = val;
m24->charbuffer[(((int)(((m24->dispontime - m24->vidtime) * 2) / (CGACONST / 2))) & 0xfc) | 1] = val;
m24->charbuffer[offset] = val;
m24->charbuffer[offset | 1] = val;
}
uint8_t m24_read(uint32_t addr, void *p)
@ -129,8 +132,8 @@ void m24_recalctimings(m24_t *m24)
_dispontime *= CGACONST / 2;
_dispofftime *= CGACONST / 2;
// printf("Timings - on %f off %f frame %f second %f\n",dispontime,dispofftime,(dispontime+dispofftime)*262.0,(dispontime+dispofftime)*262.0*59.92);
m24->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
m24->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
m24->dispontime = (uint64_t)_dispontime;
m24->dispofftime = (uint64_t)_dispofftime;
}
void m24_poll(void *p)
@ -148,7 +151,7 @@ void m24_poll(void *p)
if (!m24->linepos)
{
// pclog("Line poll %i %i %i %i - %04X %i %i %i\n", m24_lineff, vc, sc, vadj, ma, firstline, lastline, displine);
m24->vidtime += m24->dispofftime;
timer_advance_u64(&m24->timer, m24->dispofftime);
m24->stat |= 1;
m24->linepos = 1;
oldsc = m24->sc;
@ -324,7 +327,7 @@ void m24_poll(void *p)
else
{
// pclog("Line poll %i %i %i %i\n", m24_lineff, vc, sc, vadj);
m24->vidtime += m24->dispontime;
timer_advance_u64(&m24->timer, m24->dispontime);
if (m24->dispon) m24->stat &= ~1;
m24->linepos = 0;
m24->lineff ^= 1;
@ -456,7 +459,7 @@ void *m24_init()
m24->vram = malloc(0x8000);
timer_add(m24_poll, &m24->vidtime, TIMER_ALWAYS_ENABLED, m24);
timer_add(&m24->timer, m24_poll, m24, 1);
mem_mapping_add(&m24->mapping, 0xb8000, 0x08000, m24_read, NULL, NULL, m24_write, NULL, NULL, NULL, 0, m24);
io_sethandler(0x03d0, 0x0010, m24_in, NULL, NULL, m24_out, NULL, NULL, m24);
return m24;