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emulator timing fixes, VDP DMA fixes, improved DAC audio

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This commit is contained in:
kub 2020-01-14 23:00:44 +01:00
parent b9bc876c9c
commit 43e1401008
10 changed files with 118 additions and 98 deletions
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7
pico/videoport.c
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@ -97,7 +97,7 @@ static void DmaSlow(int len, unsigned int source)
Pico.m.dma_xfers = len;
if (Pico.m.dma_xfers < len) // lame 16bit var
Pico.m.dma_xfers = ~0;
SekCyclesBurnRun(CheckDMA());
SekCyclesBurnRun(CheckDMA(488 - (SekCyclesDone()-Pico.t.m68c_line_start)));
if ((source & 0xe00000) == 0xe00000) { // Ram
base = (u16 *)PicoMem.ram;
@ -344,7 +344,8 @@ static NOINLINE void CommandChange(void)
static void DrawSync(int blank_on)
{
if (Pico.m.scanline < 224 && !(PicoIn.opt & POPT_ALT_RENDERER) &&
int lines = Pico.video.reg[1]&0x08 ? 240 : 224;
if (Pico.m.scanline < lines && !(PicoIn.opt & POPT_ALT_RENDERER) &&
!PicoIn.skipFrame && Pico.est.DrawScanline <= Pico.m.scanline) {
//elprintf(EL_ANOMALY, "sync");
PicoDrawSync(Pico.m.scanline, blank_on);
@ -363,7 +364,7 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
{
case 0x00: // Data port 0 or 2
// try avoiding the sync..
if (Pico.m.scanline < 224 && (pvid->reg[1]&0x40) &&
if (Pico.m.scanline < (pvid->reg[1]&0x08 ? 240 : 224) && (pvid->reg[1]&0x40) &&
!(!pvid->pending &&
((pvid->command & 0xc00000f0) == 0x40000010 && PicoMem.vsram[pvid->addr>>1] == d))
)