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From: c0037544@cc.nu.oz.au (David Williams)
Newsgroups: comp.sys.cbm
Subject: Re: C128 Programming question
Message-ID: <4125.27440883@cc.nu.oz.au>
Date: 16 Nov 90 05:40:50 GMT
References: <1990Nov13.043708.23063@DMI.USherb.CA> <1990Nov13.162259.981@vax5.cit.cornell.edu>
Distribution: na,comp
Organization: University of Newcastle
Lines: 22

> I have a technical question here.  I'm writing an assembler input routine
> which needs to work on either the 40 or 80 column screens.  To filter out
> unwanted characters, I use the GETIN Kernal subroutine ($FFE4).  As you
> probably know, this routine dos not provide any kind of cursor.  It's easy
> to turn the cursor on in 80 columns using the ESCAPE F sequence.  But I'm
> clueless as to how to turn on the 40 column cursor...
> Anybody has a suggestion?
> Thanks in advance!
> Eric T 

The escape character (ascii 27) followed by any of the cursor escape sequences
(u,s,e,f) will turn the cursor on in a program on the 80 column screen. As the
cursor may only be a block on the 40 column screen, the u and s sequences are
invalid, but the e and f sequences will still work. Just send these to the
Kernel routine at $ffd2 at the start of the program, and there you are!

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| David Williams       | University of Newcastle 		              |
| c0037544@cc.nu.oz.au | Department of Computer Science  (Undergrad)	      |
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|   "The decision of Random Numbers is too important to be left to chance !"  |
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