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From: sbrenner@cbnewsb.cb.att.com (scott.d.brenner)
Newsgroups: comp.sys.att
Subject: 6300+ Monochrome Mode
Message-ID: <1991May29.163333.20394@cbfsb.att.com>
Date: 29 May 91 16:33:33 GMT
Sender: news@cbfsb.att.com
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 22

Does anyone know how I get an AT&T 6300 Plus with a color monitor to go
into monochrome mode?  

The System Programmer's Guide talks about ROM BIOS routines (INT 10H)
that mess with the video attributes.  The parameters I apparently need
to use are AH=0 and AL=0.  The "AL=0" tells the video controller to use
40 x 25 monochrome text mode.

This seems to be what I need to use, but I have no idea what to do with
these parameters.  Do I have to write some kind of assembly language
program (I've never done that!), or is there a way I can get into this
mode from DOS?  Also, is there a way I could go into this mode auto-
matically (like during the startup of a communications package) and then
resume the original mode later?

Any help would be highly appreciated.

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Scott D. Brenner			attmail: !sbrenner
AT&T					e-mail:  ...!att!somerset!sbrenner
Somerset, NJ				v-mail:  908-805-2198
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