RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

some support for vdp debug reg

Browse source
This commit is contained in:
notaz 2017-09-28 03:16:21 +03:00
parent 1a08dec0e0
commit e0bcb7a90d
11 changed files with 160 additions and 69 deletions
Download patch file Download diff file Expand all files Collapse all files

38
pico/videoport.c
View file

@ -361,8 +361,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
// elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x", a, d);
a&=0x1c;
if (a==0x00) // Data port 0 or 2
switch (a)
{
case 0x00: // Data port 0 or 2
// try avoiding the sync..
if (Pico.m.scanline < 224 && (pvid->reg[1]&0x40) &&
!(!pvid->pending &&
@ -392,11 +393,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2)
DmaFill(d);
return;
}
break;
if (a==0x04) // Control (command) port 4 or 6
{
case 0x04: // Control (command) port 4 or 6
if (pvid->pending)
{
// Low word of command:
@ -473,6 +472,35 @@ update_irq:
pvid->pending=1;
}
}
break;
// case 0x08: // 08 0a - HV counter - lock up
// case 0x0c: // 0c 0e - HV counter - lock up
// case 0x10: // 10 12 - PSG - handled by caller
// case 0x14: // 14 16 - PSG - handled by caller
// case 0x18: // 18 1a - no effect?
case 0x1c: // 1c 1e - debug
pvid->debug = d;
pvid->debug_p = 0;
if (d & (1 << 6)) {
pvid->debug_p |= PVD_KILL_A | PVD_KILL_B;
pvid->debug_p |= PVD_KILL_S_LO | PVD_KILL_S_HI;
}
switch ((d >> 7) & 3) {
case 1:
pvid->debug_p &= ~(PVD_KILL_S_LO | PVD_KILL_S_HI);
pvid->debug_p |= PVD_FORCE_S;
break;
case 2:
pvid->debug_p &= ~PVD_KILL_A;
pvid->debug_p |= PVD_FORCE_A;
break;
case 3:
pvid->debug_p &= ~PVD_KILL_B;
pvid->debug_p |= PVD_FORCE_B;
break;
}
break;
}
}