6 Jun
2023
6 Jun
'23
5:22 p.m.
Thanks but I'm pretty sure the Hyperion was not PC-DOS compatible.
Wikipedia says,
"However, incompatibility with the IBM PC was a concern for buyers, since many
programs of the time made direct calls to the system ROM, and the video display and serial
port used different integrated circuits than the IBM PC."
FWIW I remember as a PC clone user in the 1980s and into the 1990s acquiring machines that
only ran PC-DOS and only using PC-DOS up to and including at least version 5.
Tom
-----Original Message-----
From: db <db(a)db.net
Sent: Tuesday, June 06, 2023 5:58 AM
To: t.gardner(a)computer.org; General Discussion: On-Topic and Off-Topic Posts
<cctalk(a)classiccmp.org>
Cc: Tom Gardner <tom94022(a)comcast.net>
Subject: Re: [cctalk] First non-IBM PC-DOS Compatible PC
On Mon, Jun 05, 2023 at 10:28:26PM -0700, Tom Gardner via cctalk wrote:
FWIW I worked at a company here in Ottawa. Dynalogic. We produced a IBM look alike which
had a BIOS not copied from the original IBM PC.
In fact we used different UARTs and graphics card.
Although I was not on the Bios team Don Bailey was.
<http://www.sce.carleton.ca/faculty/bailey/bailey_bio.shtml>
http://www.sce.carleton.ca/faculty/bailey/bailey_bio.shtml
<https://museum.eecs.yorku.ca/collections/show/7>
https://museum.eecs.yorku.ca/collections/show/7
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Hi:
Doing some research for historical purposed no
litigation at all trying to identify the first legal PC-DOS compatible PC, legal in
the sense that it s BIOS was not a copy of an IBM BIOS. Eagle gets the honor of being
first MS-DOS compatible and getting sued for copying IBM s BIOS ??
The Compaq Portable which shipped in November 1982 is
generally credited with the first legal MS-DOS compatible PC. AFAIK it could not run
PC-DOS and those applications which depended upon certain IBM BIOS commands would fail.
The first legal BIOS is generally considered to be
from Phoenix which was announced in May 1984 and so far I have been unable to determine
its first system deployments. FWIW Wikipedia points to HP, Tandy and AT&T as some
time adopters of a Phoenix BIOS but my research so far is that Tandy s T1000 family
announced in October and November of 1984 was the first system to be PC-DOS compatible and
it did not use a Phoenix BIOS! Such PC-DOS compatible HP and AT&T systems were much
later and the Tandy BIOS was written by programmers of Tandon Corporation, the OEM
supplier of the first Tandy T1000s.
Can anyone identify a PC-DOS compatible PC announced
earlier than October 1984? Citations would be greatly appreciated.
Thanks
Tom