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timing for fast mode

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@246 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-09-13 18:09:11 +00:00
parent b8cbd802cd
commit e849512f15
2 changed files with 30 additions and 20 deletions
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43
Pico/Pico.c
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@ -495,21 +495,21 @@ static int PicoFrameSimple(void)
int y=0,line=0,lines=0,lines_step=0,sects;
int cycles_68k_vblock,cycles_68k_block;
if (Pico.m.pal) {
// M68k cycles/frame: 152009.78
// split to 16 run calls for active scan, for vblank split to 2 (ntsc), 3 (pal 240), 4 (pal 224)
if (Pico.m.pal && (pv->reg[1]&8)) { // 240 lines
if(pv->reg[1]&8) { // 240 lines
cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308
cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?
cycles_68k_block = 7329; // (488*240+148)/16.0, -4
cycles_68k_vblock = 11640; // (72*488-148-68)/3.0, 0
lines_step = 15;
} else {
cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224
cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88
cycles_68k_block = 6841; // (488*224+148)/16.0, -4
cycles_68k_vblock = 10682; // (88*488-148-68)/4.0, 0
lines_step = 14;
}
} else {
// M68k cycles/frame: 127840.71
cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831
cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544
cycles_68k_block = 6841; // (488*224+148)/16.0, -4
cycles_68k_vblock = 9164; // (38*488-148-68)/2.0, 0
lines_step = 14;
}
@ -557,19 +557,20 @@ static int PicoFrameSimple(void)
}
// here we render sound if ym2612 is disabled
if(!(PicoOpt&1) && PsndOut) {
if (!(PicoOpt&1) && PsndOut) {
int len = sound_render(0, PsndLen);
if(PicoWriteSound) PicoWriteSound(len);
if (PicoWriteSound) PicoWriteSound(len);
// clear sound buffer
sound_clear();
}
// render screen
if(!PicoSkipFrame) {
if(!(PicoOpt&0x10))
if (!PicoSkipFrame)
{
if (!(PicoOpt&0x10))
// Draw the screen
#if CAN_HANDLE_240_LINES
if(pv->reg[1]&8) {
if (pv->reg[1]&8) {
for (y=0;y<240;y++) PicoLine(y);
} else {
for (y=0;y<224;y++) PicoLine(y);
@ -580,6 +581,11 @@ static int PicoFrameSimple(void)
else PicoFrameFull();
}
// a gap between flags set and vint
pv->pending_ints|=0x20;
pv->status|=8; // go into vblank
SekRun(68+4);
// ---- V-Blanking period ----
// fix line counts
if(Pico.m.pal) {
@ -598,14 +604,11 @@ static int PicoFrameSimple(void)
lines_step = 19;
}
//dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);
pv->pending_ints|=0x20;
if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ
pv->status|=8; // go into vblank
if(Pico.m.z80Run && (PicoOpt&4)) // ?
if (Pico.m.z80Run && (PicoOpt&4))
z80_int();
while(sects) {
while (sects) {
lines += lines_step;
SekRun(cycles_68k_vblock);
@ -614,11 +617,11 @@ static int PicoFrameSimple(void)
line=lines;
sects--;
if(sects && CheckIdle()) break;
if (sects && CheckIdle()) break;
}
// run Z80 for remaining sections
if(sects) {
if (sects) {
lines += sects*lines_step;
PicoRunZ80Simple(line, lines);
}