4 Jul
2016
4 Jul
'16
1:43 a.m.
On 03/07/2016 00:51, Fred Cisin wrote:
Yes, they do. The rest of the ADFS formats use ordinary DSDD drives.
On 07/02/2016
02:15 PM, Peter Coghlan wrote:
> The original ADFS had 16 sectors of 256 bytes per track. However, it
> appears that more recent ADFS formats use 5 sectors of 1024 bytes.
> There are more details here:
> http://mdfs.net/Docs/Comp/Disk/Format/Formats
. . . and the "F" and "F+" would require a "high density"
drive
(not clear from that chart, but probably 1.4M) I don't the the Acorn file system, so couldn't
extract files.
But reading sectors should not be a problem, although there are
certainly SOME things that Acorn could have done that would confound an
NEC FDC.
If the sector headers are "normal", then INT1Eh (to set the sector
size), followed by INT13h should work.
Acorn formatter s/w doesn't write the optional "index mark" before the
first sector so some PCs have trouble understanding Acorn disks.
--
Pete
Pete Turnbull