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From: bobb@vice.ICO.TEK.COM (Bob Beauchaine)
Newsgroups: comp.sys.tandy
Subject: Re: TANDY GRAPHIC DRIVER
Message-ID: <6351@vice.ICO.TEK.COM>
Date: 21 Nov 90 21:12:19 GMT
References: <11531@j.cc.purdue.edu> <6347@vice.ICO.TEK.COM> <11535@j.cc.purdue.edu>
Organization: Tektronix Inc., Beaverton, Or.
Lines: 24

In article <11535@j.cc.purdue.edu> zhou@brazil.psych.purdue.edu (Albert Zhou) writes:
>
>In article 2924, Bob Beauchaine writes:
>
>> The interrupt is the same set video mode interrupt that all of the other
>> modes use : BIOS interrupt 16 (decimal), service 0 (AH = 0), with the
>> required video mode in the AL register (the Tandy (PCJr) modes are 9 for
>> 320 x 200 x 16 color, and 10 for 640 x 200 x 4 color).
>
>    These two modes are not really Tandy mode in which DESKMATE was written.
> In the third mode, you can get 640 x 200 x 16.
>


  I don't think so.  I have never in all my wanderings through Tandy 
  documentation, including the Tandy 1000 TX reference, found mention of
  a 640x200x16 color mode.  This would require some 64k of video memory,
  and I'm fairly sure that 32k is the max used by a 1000.

  Feel free to prove me wrong, but if such a mode exists, it is totally
  undocumented.

  Bob Beauchaine
  bobb@vice.ICO.TEK.COM