On Fri, 14 Aug 1998 16:56:27 +0200 (CEST), colan said:
cl>Someone posted saying that there in fact was a 2.11 which I've not
cl>been able to find reference to. By any chance was that what came
cl>with a PCjr?
PCDOS 2.1 was released specifically for the PCjr. 2.1's floppy drive
access was slowed down considerably because the drive in the PCjr was
so flimsy that it would break if it was used faster. MSDOS 2.11 was
the generic version available from Microsoft, and there also were
versions 2.2 and 2.25 with specific international support added.
"In march 1984, a year after the PC-XT introduction, IBM released DOS
version 2.1 to excise these software errors [that were in verson 2.0]
and to handle a hardware error it produced, called the PCjr."
Try to find "DOS Power Tools" by Paul Somerson, ISBN 0-553-34526-5,
Bantam computer books, from which is the above quote. It has very
detailed explanations of the workings of DOS, a great many tips and
tricks, a disk with 200 PC Magazine machine code utilities, and a
long chapter on the development of DOS, from 1.0 to 3.3, which was
the latest version when the book was printed.
Kees
--
Kees Stravers - Geldrop, The Netherlands - pb0aia at amsat dot org
Sysadmin and DEC PDP/VAX preservationist - http://vaxarchive.ml.org
Net-Tamer V 1.08.1 - Registered
Received on Fri Aug 14 1998 - 20:35:07 BST