RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-04 23:07:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

md vdp, fix v_counter reading, some cleanup

Browse source
This commit is contained in:
kub 2024-06-14 23:05:37 +02:00
parent 31efd4546e
commit 7647f87b29
1 changed files with 17 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

27
pico/videoport.c
View file

@ -944,13 +944,8 @@ PICO_INTERNAL_ASM void PicoVideoWrite(u32 a,unsigned short d)
}
d &= 0xff;
if (num == 0 && !(pvid->reg[0]&2) && (d&2))
pvid->hv_latch = PicoVideoRead(0x08);
if (num == 12 && ((pvid->reg[12]^d)&0x01))
PicoVideoFIFOMode(pvid->reg[1]&0x40, d & 1);
if (num == 1 && ((pvid->reg[1]^d)&0x40)) {
PicoVideoFIFOMode(d & 0x40, pvid->reg[12]&1);
// handle line blanking before line rendering. Only the last switch
// before the 1st sync for other reasons is honoured.
PicoVideoSync(1);
@ -965,15 +960,21 @@ PICO_INTERNAL_ASM void PicoVideoWrite(u32 a,unsigned short d)
switch (num)
{
case 0x00:
if ((~dold&d)&2) {
unsigned c = SekCyclesDone() - Pico.t.m68c_line_start;
pvid->hv_latch = VdpFIFO.fifo_hcounts[c/clkdiv] | (pvid->v_counter << 8);
}
elprintf(EL_INTSW, "hint_onoff: %i->%i [%u] pend=%i @ %06x", (dold&0x10)>>4,
(d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);
goto update_irq;
case 0x01:
elprintf(EL_INTSW, "vint_onoff: %i->%i [%u] pend=%i @ %06x", (dold&0x20)>>5,
(d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);
if ((d^dold)&0x40)
PicoVideoFIFOMode(d & 0x40, pvid->reg[12]&1);
if (!(pvid->status & PVS_VB2))
pvid->status &= ~SR_VB;
pvid->status |= ((d >> 3) ^ SR_VB) & SR_VB; // forced blanking
elprintf(EL_INTSW, "vint_onoff: %i->%i [%u] pend=%i @ %06x", (dold&0x20)>>5,
(d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);
goto update_irq;
case 0x05:
case 0x06:
@ -982,7 +983,10 @@ PICO_INTERNAL_ASM void PicoVideoWrite(u32 a,unsigned short d)
case 0x0c:
// renderers should update their palettes if sh/hi mode is changed
if ((d^dold)&8) Pico.m.dirtyPal = 1;
if ((d^dold)&1) Pico.est.rendstatus |= PDRAW_DIRTY_SPRITES;
if ((d^dold)&1) {
PicoVideoFIFOMode(pvid->reg[1]&0x40, d & 1);
Pico.est.rendstatus |= PDRAW_DIRTY_SPRITES;
}
break;
default:
return;
@ -1154,8 +1158,11 @@ unsigned char PicoVideoRead8CtlL(int is_from_z80)
unsigned char PicoVideoRead8HV_H(int is_from_z80)
{
elprintf(EL_HVCNT, "vcounter: %02x [%u] @ %06x", Pico.video.v_counter, SekCyclesDone(), SekPc);
return Pico.video.v_counter;
u32 d = Pico.video.v_counter;
if (Pico.video.reg[0]&2)
d = Pico.video.hv_latch >> 8;
elprintf(EL_HVCNT, "vcounter: %02x [%u] @ %06x", d, SekCyclesDone(), SekPc);
return d;
}
// FIXME: broken