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FDC multi-track commands do not literally access multiple tracks. Limited read/

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write data to a single track/cylinder.
This commit is contained in:
SarahW 2020-03-04 21:57:20 +00:00
commit 11904d765a
1 changed files with 52 additions and 73 deletions
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37
src/fdc.c
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@ -34,7 +34,6 @@ typedef struct FDC
int format_state;
int tc;
int written;
int in_seek_mt;
int pcjr, ps1;
@ -860,11 +859,8 @@ void fdc_callback()
discint = 0;
return;
case 5: /*Write data*/
if (!fdc.in_seek_mt)
{
readflash_set(READFLASH_FDC, fdc.drive);
fdc.sector++;
if (fdc.sector > fdc.params[5])
if (fdc.sector == fdc.params[5])
{
fdc.sector = 1;
if (fdc.command & 0x80)
@ -873,7 +869,7 @@ void fdc_callback()
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
fdc.tc = 1;
}
}
else
@ -882,6 +878,8 @@ void fdc_callback()
fdc.tc = 1;
}
}
else
fdc.sector++;
if (fdc.tc)
{
discint=-2;
@ -896,25 +894,13 @@ void fdc_callback()
paramstogo=7;
return;
}
if (doseek)
{
fdd_seek(fdc.drive, 1);
fdc.in_seek_mt = 1;
/*Allow seek to complete before starting next sector write*/
return;
}
}
fdc.in_seek_mt = 0;
disc_writesector(fdc.drive, fdc.sector, fdc.rw_track, fdc.head, fdc.rate, fdc.params[4]);
// ioc_fiq(IOC_FIQ_DISC_DATA);
return;
case 6: /*Read data*/
// rpclog("Read data %i\n", fdc.tc);
if (!fdc.in_seek_mt)
{
readflash_set(READFLASH_FDC, fdc.drive);
fdc.sector++;
if (fdc.sector > fdc.params[5])
if (fdc.sector == fdc.params[5])
{
fdc.sector = 1;
if (fdc.command & 0x80)
@ -923,7 +909,7 @@ void fdc_callback()
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
fdc.tc = 1;
}
}
else
@ -932,6 +918,8 @@ void fdc_callback()
fdc.tc = 1;
}
}
else
fdc.sector++;
if (fdc.tc)
{
fdc.inread = 0;
@ -947,15 +935,6 @@ void fdc_callback()
paramstogo=7;
return;
}
if (doseek)
{
fdd_seek(fdc.drive, 1);
fdc.in_seek_mt = 1;
/*Allow seek to complete before starting next sector read*/
return;
}
}
fdc.in_seek_mt = 0;
disc_readsector(fdc.drive, fdc.sector, fdc.rw_track, fdc.head, fdc.rate, fdc.params[4]);
fdc.inread = 1;
return;