On Jan 5 2005, 14:27, Fred Cisin wrote:
> > In the case of DOS 6.22, the message
"Cannot do binary reads from
a
>
device" is at offset 970F in
COMMAND.COM On Tue, 4 Jan 2005, Tom Jennings
wrote:
Sheesh, it only took them 10 years to declare it
impossible and
test for the error.
Well, ...
in DOS 4.00, it is at offset 7CCC. It may have been there since
QDOS?
Dunno, I don't have quite such old versions :-) My old copy of "The
MS-DOS Bible" says "every version" -- it means 3.30 and older --
disallows binary reads from devices. The same message is at 5254 in
MS-DOS 3.30 (ditto in PC-DOS 3.30), at 4CA0 in 3.21, and 4CCC in
IBM-DOS 4.01 (from a Compaq). I can't read my MS-DOS 2.10 and 2.11
disks on the hardware I have here. "Binary reads from a device are not
allowed" is the message at 8753 in DR-DOS 3.41.
All the ones that I could boot (ie all but 2.10/2.11) print the message
and then exit when you try COPY /B CON: dummy .
--
Pete Peter Turnbull
Network Manager
University of York