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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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125
src/fdc.c
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@ -34,8 +34,7 @@ typedef struct FDC
int format_state;
int tc;
int written;
int in_seek_mt;
int pcjr, ps1;
pc_timer_t watchdog_timer;
@ -860,102 +859,82 @@ void fdc_callback()
discint = 0;
return;
case 5: /*Write data*/
if (!fdc.in_seek_mt)
readflash_set(READFLASH_FDC, fdc.drive);
if (fdc.sector == fdc.params[5])
{
readflash_set(READFLASH_FDC, fdc.drive);
fdc.sector++;
if (fdc.sector > fdc.params[5])
fdc.sector = 1;
if (fdc.command & 0x80)
{
fdc.sector = 1;
if (fdc.command & 0x80)
{
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
}
}
else
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
fdc.tc = 1;
}
}
if (fdc.tc)
else
{
discint=-2;
fdc_int();
fdc.stat=0xD0;
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
fdc.res[5]=fdc.res[6]=0;
fdc.res[7]=fdc.rw_track;
fdc.res[8]=fdc.head;
fdc.res[9]=fdc.sector;
fdc.res[10]=fdc.params[4];
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.rw_track++;
fdc.tc = 1;
}
}
fdc.in_seek_mt = 0;
else
fdc.sector++;
if (fdc.tc)
{
discint=-2;
fdc_int();
fdc.stat=0xD0;
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
fdc.res[5]=fdc.res[6]=0;
fdc.res[7]=fdc.rw_track;
fdc.res[8]=fdc.head;
fdc.res[9]=fdc.sector;
fdc.res[10]=fdc.params[4];
paramstogo=7;
return;
}
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);
if (fdc.sector == fdc.params[5])
{
readflash_set(READFLASH_FDC, fdc.drive);
fdc.sector++;
if (fdc.sector > fdc.params[5])
fdc.sector = 1;
if (fdc.command & 0x80)
{
fdc.sector = 1;
if (fdc.command & 0x80)
{
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
}
}
else
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
fdc.tc = 1;
}
}
if (fdc.tc)
else
{
fdc.inread = 0;
discint=-2;
fdc_int();
fdc.stat=0xD0;
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
fdc.res[5]=fdc.res[6]=0;
fdc.res[7]=fdc.rw_track;
fdc.res[8]=fdc.head;
fdc.res[9]=fdc.sector;
fdc.res[10]=fdc.params[4];
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.rw_track++;
fdc.tc = 1;
}
}
fdc.in_seek_mt = 0;
else
fdc.sector++;
if (fdc.tc)
{
fdc.inread = 0;
discint=-2;
fdc_int();
fdc.stat=0xD0;
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
fdc.res[5]=fdc.res[6]=0;
fdc.res[7]=fdc.rw_track;
fdc.res[8]=fdc.head;
fdc.res[9]=fdc.sector;
fdc.res[10]=fdc.params[4];
paramstogo=7;
return;
}
disc_readsector(fdc.drive, fdc.sector, fdc.rw_track, fdc.head, fdc.rate, fdc.params[4]);
fdc.inread = 1;
return;