static int PicoFrameHints(void)
{
struct PicoVideo *pv=&Pico.video;
- int lines, y, lines_vis = 224, line_sample, skip;
+ int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap;
int hint; // Hint counter
- Pico.m.scanline = 0;
+ pv->v_counter = Pico.m.scanline = 0;
if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
// draw a frame just after vblank in alternative render mode
if (Pico.m.pal) {
line_sample = 68;
- if(pv->reg[1]&8) lines_vis = 240;
+ if (pv->reg[1]&8) lines_vis = 240;
} else {
line_sample = 93;
}
for (y = 0; y < lines_vis; y++)
{
- Pico.m.scanline = y;
+ pv->v_counter = Pico.m.scanline = y;
+ if ((pv->reg[12]&6) == 6) { // interlace mode 2
+ pv->v_counter <<= 1;
+ pv->v_counter |= pv->v_counter >> 8;
+ pv->v_counter &= 0xff;
+ }
// VDP FIFO
pv->lwrite_cnt -= 12;
#ifdef PICO_CD
update_chips();
#else
- if (PicoLineHook) PicoLineHook(1);
+ if (PicoLineHook) PicoLineHook();
#endif
}
// V-int line (224 or 240)
Pico.m.scanline = y;
+ pv->v_counter = 0xe0; // bad for 240 mode
+ if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1;
// VDP FIFO
pv->lwrite_cnt=0;
if (pv->reg[0]&0x10) SekInterrupt(4);
}
- // V-Interrupt:
pv->status|=0x08; // go into vblank
pv->pending_ints|=0x20;
#ifdef PICO_CD
update_chips();
#else
- if (PicoLineHook) PicoLineHook(1);
+ if (PicoLineHook) PicoLineHook();
#endif
// PAL line count might actually be 313 according to Steve Snake, but that would complicate things.
lines = Pico.m.pal ? 312 : 262;
+ vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens
for (y++; y < lines; y++)
{
- Pico.m.scanline = y;
+ pv->v_counter = Pico.m.scanline = y;
+ if (y >= vcnt_wrap)
+ pv->v_counter -= Pico.m.pal ? 56 : 6;
+ if ((pv->reg[12]&6) == 6)
+ pv->v_counter = (pv->v_counter << 1) | 1;
+ pv->v_counter &= 0xff;
PAD_DELAY
#ifdef PICO_CD
#ifdef PICO_CD
update_chips();
#else
- if (PicoLineHook) PicoLineHook(1);
+ if (PicoLineHook) PicoLineHook();
#endif
}