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core, fix z80 vcounter value

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This commit is contained in:
kub 2023-07-12 22:35:33 +02:00
parent adffea8dae
commit 7021622153
4 changed files with 27 additions and 28 deletions
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35
pico/pico_cmn.c
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@ -136,7 +136,6 @@ static int PicoFrameHints(void)
{
struct PicoVideo *pv = &Pico.video;
int lines, y, lines_vis, skip;
int vcnt_wrap, vcnt_adj;
int hint; // Hint counter
pevt_log_m68k_o(EVT_FRAME_START);
@ -144,7 +143,6 @@ static int PicoFrameHints(void)
skip = PicoIn.skipFrame;
Pico.t.m68c_frame_start = Pico.t.m68c_aim;
pv->v_counter = Pico.m.scanline = 0;
z80_resetCycles();
PsndStartFrame();
@ -153,16 +151,13 @@ static int PicoFrameHints(void)
// === active display ===
pv->status |= PVS_ACTIVE;
for (y = 0; ; y++)
for (y = 0;; 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;
}
Pico.m.scanline = y;
pv->v_counter = PicoVideoGetV(y);
if ((y == 224 && !(pv->reg[1] & 8)) || y == 240)
lines_vis = (pv->reg[1] & 8) ? 240 : 224;
if (y == lines_vis)
break;
PAD_DELAY();
@ -268,25 +263,11 @@ static int PicoFrameHints(void)
pevt_log_m68k_o(EVT_NEXT_LINE);
// === VBLANK ===
if (Pico.m.pal) {
lines = 313;
vcnt_wrap = 0x103;
vcnt_adj = 57;
}
else {
lines = 262;
vcnt_wrap = 0xEB;
vcnt_adj = 6;
}
lines = Pico.m.pal ? 313 : 262;
for (y++; y < lines - 1; y++)
{
pv->v_counter = Pico.m.scanline = y;
if (y >= vcnt_wrap)
pv->v_counter -= vcnt_adj;
if ((pv->reg[12]&6) == 6)
pv->v_counter = (pv->v_counter << 1) | 1;
pv->v_counter &= 0xff;
Pico.m.scanline = y;
pv->v_counter = PicoVideoGetV(y);
PAD_DELAY();