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stat -> status; improve MDA register decoding; add MDA CRTC, register and mode enums

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starfrost013
2025-06-11 17:37:15 +01:00
parent dd6f7746a9
commit 317a5b7ade
16 changed files with 220 additions and 147 deletions
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12
src/video/vid_hercules_plus.c
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@@ -67,7 +67,7 @@ typedef struct {
uint8_t crtc[32];
int crtcreg;
uint8_t ctrl, ctrl2, stat;
uint8_t ctrl, ctrl2, status;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
@@ -194,7 +194,7 @@ herculesplus_in(uint16_t port, void *priv)
case 0x3ba:
/* 0x10: Hercules Plus card identity */
ret = (dev->stat & 0xf) | ((dev->stat & 8) << 4) | 0x10;
ret = (dev->status & 0xf) | ((dev->status & 8) << 4) | 0x10;
break;
default:
@@ -494,7 +494,7 @@ herculesplus_poll(void *priv)
VIDEO_MONITOR_PROLOGUE();
if (!dev->linepos) {
timer_advance_u64(&dev->timer, dev->dispofftime);
dev->stat |= 1;
dev->status |= 1;
dev->linepos = 1;
scanline_old = dev->scanline;
if ((dev->crtc[8] & 3) == 3)
@@ -519,19 +519,19 @@ herculesplus_poll(void *priv)
}
dev->scanline = scanline_old;
if (dev->vc == dev->crtc[7] && !dev->scanline)
dev->stat |= 8;
dev->status |= 8;
dev->displine++;
if (dev->displine >= 500)
dev->displine = 0;
} else {
timer_advance_u64(&dev->timer, dev->dispontime);
if (dev->dispon)
dev->stat &= ~1;
dev->status &= ~1;
dev->linepos = 0;
if (dev->vsynctime) {
dev->vsynctime--;
if (!dev->vsynctime)
dev->stat &= ~8;
dev->status &= ~8;
}
if (dev->scanline == (dev->crtc[11] & 31) || ((dev->crtc[8] & 3) == 3 && dev->scanline == ((dev->crtc[11] & 31) >> 1))) {