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core vdp, fix status reading synchronisation

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This commit is contained in:
kub 2022-04-22 20:50:20 +02:00
parent 364be97d1b
commit 72c2a04a9d
1 changed files with 5 additions and 4 deletions
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9
pico/videoport.c
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@ -984,14 +984,15 @@ static u32 VideoSr(const struct PicoVideo *pv)
{
unsigned int hp = pv->reg[12]&1 ? hboff40*488/slots40 : hboff32*488/slots32;
unsigned int hl = pv->reg[12]&1 ? hblen40*488/slots40 : hblen32*488/slots32;
unsigned int c;
u32 d = (u16)pv->status;
unsigned int c = SekCyclesDone() - Pico.t.m68c_line_start;
u32 d;
PicoVideoFIFOSync(c);
d = (u16)pv->status;
c = SekCyclesDone() - Pico.t.m68c_line_start;
if (c - hp < hl)
d |= SR_HB;
PicoVideoFIFOSync(c);
if (VdpFIFO.fifo_total >= 4)
d |= SR_FULL;
else if (!VdpFIFO.fifo_total)