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From: ignatz@aicchi.UUCP (Ihnat)
Newsgroups: net.micro.pc,net.micro
Subject: Re: Tandy compatibles
Message-ID: <706@aicchi.UUCP>
Date: Wed, 5-Mar-86 01:29:46 EST
Article-I.D.: aicchi.706
Posted: Wed Mar  5 01:29:46 1986
Date-Received: Sat, 8-Mar-86 18:43:44 EST
References: <515@tekig4.UUCP> <1041@ncoast.UUCP>
Reply-To: ignatz@aicchi.UUCP (Ihnat)
Organization: Analysts International Corp; Chicago Branch
Lines: 22
Xref: watmath net.micro.pc:7307 net.micro:13983

The Tandy 1000 is compatible with an IBM PC, but with some differences
that are important, probably, only to someone doing extensive graphics
and sound work.  The graphics BIOS routines have some *definite* bugs when
dealing with color graphics, which I was told (while discovering these
gems on contract) that Tandy has no intention of fixing.  (It's painful
to fix roms; they're not easy to get to everybody, I guess.)  Also, notice
that the 1000 has PC/Jr compatible (kindof) color graphics and sound
capabilities, vice the vanilla PC capabilities.  Except for the color bugs,
and the fact that they 'cheated' and tried to make the sound hardware cheaper
by eliminating some gates.  (This means that to control differente sound
sources on the Tandy 1000, you can't just disable that input; all inputs
are OR'd together, and you have to explicitly bring the volume/amplitude
to zero to shut a single source down...)

	-Dave Ihnat
	 Analysts International Corporation

-- 
	Dave Ihnat
	Analysts International Corporation
	(312) 882-4673
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