Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

125
src/fdc.c
View file

@ -34,8 +34,7 @@ typedef struct FDC
int format_state; int format_state;
int tc; int tc;
int written; int written;
int in_seek_mt;
int pcjr, ps1; int pcjr, ps1;
pc_timer_t watchdog_timer; pc_timer_t watchdog_timer;
@ -860,102 +859,82 @@ void fdc_callback()
discint = 0; discint = 0;
return; return;
case 5: /*Write data*/ 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 = 1;
fdc.sector++; if (fdc.command & 0x80)
if (fdc.sector > fdc.params[5])
{ {
fdc.sector = 1; fdc.head ^= 1;
if (fdc.command & 0x80) if (!fdc.head)
{
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
}
}
else
{ {
fdc.rw_track++; fdc.rw_track++;
fdc.tc = 1; fdc.tc = 1;
} }
} }
if (fdc.tc) else
{ {
discint=-2; fdc.rw_track++;
fdc_int(); fdc.tc = 1;
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.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]); disc_writesector(fdc.drive, fdc.sector, fdc.rw_track, fdc.head, fdc.rate, fdc.params[4]);
// ioc_fiq(IOC_FIQ_DISC_DATA); // ioc_fiq(IOC_FIQ_DISC_DATA);
return; return;
case 6: /*Read data*/ case 6: /*Read data*/
// rpclog("Read data %i\n", fdc.tc); // 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 = 1;
fdc.sector++; if (fdc.command & 0x80)
if (fdc.sector > fdc.params[5])
{ {
fdc.sector = 1; fdc.head ^= 1;
if (fdc.command & 0x80) if (!fdc.head)
{
fdc.head ^= 1;
if (!fdc.head)
{
fdc.rw_track++;
doseek = 1;
}
}
else
{ {
fdc.rw_track++; fdc.rw_track++;
fdc.tc = 1; fdc.tc = 1;
} }
} }
if (fdc.tc) else
{ {
fdc.inread = 0; fdc.rw_track++;
discint=-2; fdc.tc = 1;
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.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]); disc_readsector(fdc.drive, fdc.sector, fdc.rw_track, fdc.head, fdc.rate, fdc.params[4]);
fdc.inread = 1; fdc.inread = 1;
return; return;