80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

Merge pull request #4229 from 86Box/tc1995

Browse Source 
ESDI/MFM AT changes:
This commit is contained in:
Miran Grča
2024-03-01 19:38:05 +01:00
committed by GitHub
parent 41e1a56d62 ff6964f73d
commit 9240fec451
2 changed files with 31 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/disk/hdc_esdi_at.c
View File

@@ -129,23 +129,24 @@ esdi_at_log(const char *fmt, ...)
static __inline void
irq_raise(esdi_t *esdi)
{
if (!(esdi->fdisk & 2))
picint(1 << 14);
esdi->irqstat = 1;
if (!(esdi->fdisk & 2))
picint_common(1 << 14, PIC_IRQ_EDGE, 1, NULL);
}
static __inline void
irq_lower(UNUSED(esdi_t *esdi))
irq_lower(esdi_t *esdi)
{
picintc(1 << 14);
esdi->irqstat = 0;
if (!(esdi->fdisk & 2))
picint_common(1 << 14, PIC_IRQ_EDGE, 0, NULL);
}
static __inline void
irq_update(UNUSED(esdi_t *esdi))
irq_update(esdi_t *esdi)
{
if (esdi->irqstat && !((pic2.irr | pic2.isr) & 0x40) && !(esdi->fdisk & 2))
picint(1 << 14);
uint8_t set = !(esdi->fdisk & 2) && esdi->irqstat;
picint_common(1 << 14, PIC_IRQ_EDGE, set, NULL);
}
static void
@@ -263,6 +264,7 @@ esdi_write(uint16_t port, uint8_t val, void *priv)
double seek_time;
double xfer_time;
off64_t addr;
uint8_t old;
esdi_at_log("WD1007 write(%04x, %02x)\n", port, val);
@@ -411,15 +413,15 @@ esdi_write(uint16_t port, uint8_t val, void *priv)
esdi_set_callback(esdi, 500 * HDC_TIME);
esdi->reset = 1;
esdi->status = STAT_BUSY;
}
if (val & 0x04) {
} else if (!(esdi->fdisk & 0x04) && (val & 0x04)) {
/* Drive held in reset. */
esdi_set_callback(esdi, 0);
esdi->status = STAT_BUSY;
}
old = esdi->fdisk;
esdi->fdisk = val;
irq_update(esdi);
if (!(val & 0x02) && (old & 0x02))
irq_update(esdi);
break;
default:

32
src/disk/hdc_st506_at.c
View File

@@ -134,26 +134,27 @@ st506_at_log(const char *fmt, ...)
# define st506_at_log(fmt, ...)
#endif
static inline void
static __inline void
irq_raise(mfm_t *mfm)
{
if (!(mfm->fdisk & 2))
picint(1 << 14);
mfm->irqstat = 1;
if (!(mfm->fdisk & 2))
picint_common(1 << 14, PIC_IRQ_EDGE, 1, NULL);
}
static inline void
irq_lower(UNUSED(mfm_t *mfm))
static __inline void
irq_lower(mfm_t *mfm)
{
picintc(1 << 14);
mfm->irqstat = 0;
if (!(mfm->fdisk & 2))
picint_common(1 << 14, PIC_IRQ_EDGE, 0, NULL);
}
static void
static __inline void
irq_update(mfm_t *mfm)
{
if (mfm->irqstat && !((pic2.irr | pic2.isr) & 0x40) && !(mfm->fdisk & 2))
picint(1 << 14);
uint8_t set = !(mfm->fdisk & 2) && mfm->irqstat;
picint_common(1 << 14, PIC_IRQ_EDGE, set, NULL);
}
/*
@@ -378,6 +379,7 @@ static void
mfm_write(uint16_t port, uint8_t val, void *priv)
{
mfm_t *mfm = (mfm_t *) priv;
uint8_t old;
st506_at_log("WD1003 write(%04x, %02x)\n", port, val);
@@ -408,7 +410,7 @@ mfm_write(uint16_t port, uint8_t val, void *priv)
case 0x01f6: /* drive/head */
mfm->head = val & 0xF;
mfm->drvsel = (val & 0x10) ? 1 : 0;
mfm->drvsel = !!(val & 0x10);
if (mfm->drives[mfm->drvsel].present)
mfm->status = STAT_READY | STAT_DSC;
else
@@ -425,15 +427,15 @@ mfm_write(uint16_t port, uint8_t val, void *priv)
timer_set_delay_u64(&mfm->callback_timer, 500 * MFM_TIME);
mfm->reset = 1;
mfm->status = STAT_BUSY;
}
if (val & 0x04) {
} else if (!(mfm->fdisk & 0x04) && (val & 0x04)) {
/* Drive held in reset. */
timer_disable(&mfm->callback_timer);
mfm->status = STAT_BUSY;
}
old = mfm->fdisk;
mfm->fdisk = val;
irq_update(mfm);
if (!(val & 0x02) && (old & 0x02))
irq_update(mfm);
break;
default: