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atari8: added VDELAY, fixed p-p collisions

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This commit is contained in:
Steven Hugg 2022-09-03 10:24:49 -05:00
parent afe73e23e3
commit 56e8fca270
2 changed files with 18 additions and 12 deletions
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3
src/machine/atari8.ts
View File

@ -190,7 +190,8 @@ export class Atari800 extends BasicScanlineMachine {
// update ANTIC
if (this.antic.clockPulse()) {
// ANTIC DMA cycle, update GTIA
this.gtia.updateGfx(this.antic.h - 1, this.lastdmabyte); // HALT pin
if (this.antic.h < 8)
this.gtia.updateGfx(this.antic.h - 1, this.antic.v, this.lastdmabyte); // HALT pin
this.probe.logClocks(1);
} else {
super.advanceCPU();

27
src/machine/chips/gtia.ts
View File

@ -74,6 +74,7 @@ export class GTIA {
gtiacol = 0;
gtiacol2 = 0;
hbias = HOFFSET;
pmDebugMask = -1;
reset() {
this.regs.fill(0);
@ -113,13 +114,19 @@ export class GTIA {
setBias(b: number) {
this.hbias = HOFFSET + b;
}
updateGfx(h: number, data: number) {
updateGfx(h: number, v: number, data: number) {
switch (h) {
case 0:
if (this.regs[GRACTL] & 1) { this.regs[GRAFM] = data; }
if (this.regs[GRACTL] & 1) {
// TODO: VDELAY
this.regs[GRAFM] = data;
}
break;
case 2: case 3: case 4: case 5:
if (this.regs[GRACTL] & 2) { this.regs[GRAFP0 - 2 + h] = data; }
if (this.regs[GRACTL] & 2) {
if (!(v&1) || !(this.regs[VDELAY] & (1<<(h+2))))
this.regs[GRAFP0 - 2 + h] = data;
}
break;
}
}
@ -172,7 +179,6 @@ export class GTIA {
let pfset = this.an - 4; // TODO?
let topobj = -1;
let ppmask = 0;
let ppcount = 0;
// players
for (let i = 0; i < 4; i++) {
let bit = this.shiftObject(i);
@ -181,7 +187,6 @@ export class GTIA {
this.readregs[P0PF + i] |= 1 << pfset;
}
ppmask |= 1 << i;
ppcount++;
let prio = PRIOR_TABLE[i + priobias];
if (prio < topprio) {
topobj = i;
@ -205,12 +210,11 @@ export class GTIA {
}
}
// set player-player collision flags
if (ppcount > 1) {
this.readregs[P0PL + 0] |= ppmask & ~1;
this.readregs[P0PL + 1] |= ppmask & ~2;
this.readregs[P0PL + 2] |= ppmask & ~4;
this.readregs[P0PL + 3] |= ppmask & ~8;
}
// TODO: either as a player or a GTIA mode 2 color
if (ppmask & 1) this.readregs[P0PL + 0] |= ppmask & ~1;
if (ppmask & 2) this.readregs[P0PL + 1] |= ppmask & ~2;
if (ppmask & 4) this.readregs[P0PL + 2] |= ppmask & ~4;
if (ppmask & 8) this.readregs[P0PL + 3] |= ppmask & ~8;
this.pmcol = topobj >= 0 ? this.getObjectColor(topobj) : -1;
}
shiftObject(i: number) {
@ -230,6 +234,7 @@ export class GTIA {
}
triggerObject(i: number) {
let size, data;
if (!(this.pmDebugMask & (1<<i))) return;
if (i < 4) {
size = this.regs[SIZEP0 + i] & 3;
data = this.regs[GRAFP0 + i];