Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ihnp4!ttrdc!ttrde!stox
From: stox@ttrde.UUCP (Kenneth P. Stox)
Newsgroups: comp.sys.att
Subject: Re: 50 lines on 6300 display (please post)
Summary: simple BIOS call
Message-ID: <316@ttrde.UUCP>
Date: 15 Jan 88 18:01:10 GMT
References: <793@ur-tut.UUCP> <12735@oliveb.olivetti.com>
Organization: AT&T, Skokie, IL
Lines: 40

In article <12735@oliveb.olivetti.com>, gnome@oliveb.olivetti.com (Gary) writes:
> 
> Please post these programs, or mail them to me directly.  Thanks!
> (the mail path to you bounced -- sorry for the posting)

The 50 line screen is supported in later versions of the BIOS ( ie. 1.21 + ),
a simple way to do it is as follows:

The 6300		You
C>			debug
-			a
XXXX:0100		mov ax, 0048
XXXX:0102		int 10
XXXX:0105		[ just hit return ]
-			g 105
-			[ you are now in 50 line mode ]
-			q
C>

and to get out....
C>			debug
-			a
XXXX:0100		mov ax, 0002
XXXX:0103		int 10
XXXX:0105		[ just hit return ]
-			g 105
-			[ back to 25 line mode ]
-			q
C>

BTW, you can write small .com programs this way. name the file, add the
lines to the code to call the exit interrupt, load the cx register with
the number of bytes in the files, and write it. Nothing like a 10 byte
.com program, and it's a hell of a lot faster and easier than using
masm.

Ken Stox
630 Development Group
AT&T Research and Development
Skokie, Illinois