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line draw deferment implemented

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@508 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-07-01 13:42:12 +00:00
parent 1a65e3b161
commit b6d7ac7090
8 changed files with 120 additions and 99 deletions
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73
Pico/VideoPort.c
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@ -323,14 +323,32 @@ static void CommandChange(void)
if (cmd&0x80) CommandDma();
}
static __inline void DrawSync(int blank_on)
{
if (Pico.m.scanline < 224 && !(PicoOpt & POPT_ALT_RENDERER) &&
!PicoSkipFrame && DrawScanline <= Pico.m.scanline) {
elprintf(EL_ANOMALY, "sync");
PicoDrawSync(Pico.m.scanline, blank_on);
}
}
PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
{
struct PicoVideo *pvid=&Pico.video;
if (Pico.m.scanline < 224)
elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x", a, d);
a&=0x1c;
if (a==0x00) // Data port 0 or 2
{
// try avoiding the sync..
if (Pico.m.scanline < 224 && (pvid->reg[1]&0x40) &&
!(!pvid->pending &&
((pvid->command & 0xc00000f0) == 0x40000010 && Pico.vsram[pvid->addr>>1] == d))
)
DrawSync(0);
if (pvid->pending) {
CommandChange();
pvid->pending=0;
@ -344,7 +362,7 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
else
{
// preliminary FIFO emulation for Chaos Engine, The (E)
if(!(pvid->status&8) && (pvid->reg[1]&0x40) && Pico.m.scanline!=-1 && !(PicoOpt&POPT_DIS_VDP_FIFO)) // active display, accurate mode?
if (!(pvid->status&8) && (pvid->reg[1]&0x40) && Pico.m.scanline!=-1 && !(PicoOpt&POPT_DIS_VDP_FIFO)) // active display, accurate mode?
{
pvid->status&=~0x200; // FIFO no longer empty
pvid->lwrite_cnt++;
@ -362,8 +380,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
if (a==0x04) // Control (command) port 4 or 6
{
if(pvid->pending)
if (pvid->pending)
{
if (d & 0x80) DrawSync(0); // only need sync for DMA
// Low word of command:
pvid->command&=0xffff0000;
pvid->command|=d;
@ -377,24 +396,26 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
// Register write:
int num=(d>>8)&0x1f;
int dold=pvid->reg[num];
int update_irq = 0, blank_on = 0;
pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)
if (num > 0x0a && !(pvid->reg[1]&4)) {
elprintf(EL_ANOMALY, "%02x written to reg %02x in SMS mode @ %06x", d, num, SekPc);
return;
} else
pvid->reg[num]=(unsigned char)d;
}
switch (num)
{
case 0x00:
elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x10)>>4,
(d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);
goto update_irq;
update_irq = 1;
break;
case 0x01:
elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x20)>>5,
(d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);
if (!(d&0x40) && SekCyclesLeft > 390) rendstatus |= PDRAW_EARLY_BLANK;
goto update_irq;
if (!(d&0x40) && SekCyclesLeft > 390) blank_on = 1;
update_irq = 1;
break;
case 0x05:
if (d^dold) rendstatus |= PDRAW_SPRITES_MOVED;
break;
@ -403,21 +424,19 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
if ((d^dold)&8) Pico.m.dirtyPal = 2;
break;
}
return;
DrawSync(blank_on);
pvid->reg[num]=(unsigned char)d;
if (!update_irq) return;
update_irq:;
#ifndef EMU_CORE_DEBUG
// update IRQ level (Lemmings, Wiz 'n' Liz intro, ... )
// may break if done improperly:
// International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx),
// Fatal Rewind (crash), Sesame Street Counting Cafe
// update IRQ level
if (!SekShouldInterrupt) // hack
{
int lines, pints, irq=0;
lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10);
pints = (pvid->pending_ints&lines);
if(pints & 0x20) irq = 6;
else if(pints & 0x10) irq = 4;
if (pints & 0x20) irq = 6;
else if (pints & 0x10) irq = 4;
SekInterrupt(irq); // update line
if (irq && Pico.m.scanline!=-1) SekEndRun(24); // make it delayed
@ -437,20 +456,17 @@ update_irq:;
PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
{
unsigned int d=0;
a&=0x1c;
if (a==0x00) // data port
{
d=VideoRead();
goto end;
return VideoRead();
}
if (a==0x04) // control port
{
struct PicoVideo *pv=&Pico.video;
unsigned int d;
d=pv->status;
if (PicoOpt&POPT_ALT_RENDERER) d|=0x0020; // sprite collision (Shadow of the Beast)
if (!(pv->reg[1]&0x40)) d|=0x0008; // set V-Blank if display is disabled
@ -462,7 +478,7 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
pv->pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald)
elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc);
goto end;
return d;
}
// H-counter info (based on Generator):
@ -482,9 +498,10 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
// check: Sonic 3D Blast bonus, Cannon Fodder, Chase HQ II, 3 Ninjas kick back, Road Rash 3, Skitchin', Wheel of Fortune
if ((a&0x1c)==0x08)
{
unsigned int hc;
unsigned int hc, d;
if(Pico.m.scanline != -1) {
if (Pico.m.scanline != -1)
{
int lineCycles=(488-SekCyclesLeft)&0x1ff;
d=Pico.m.scanline; // V-Counter
@ -500,9 +517,9 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
}
if(Pico.m.pal) {
if(d >= 0x103) d-=56; // based on Gens
if (d >= 0x103) d-=56; // based on Gens
} else {
if(d >= 0xEB) d-=6;
if (d >= 0xEB) d-=6;
}
if((Pico.video.reg[12]&6) == 6) {
@ -514,10 +531,8 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
elprintf(EL_HVCNT, "hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc);
d&=0xff; d<<=8;
d|=hc;
goto end;
return d;
}
end:
return d;
return 0;
}