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From: jdm@h.cs.wvu.wvnet.edu (James D Mooney,205K,7,2913548)
Newsgroups: comp.sys.apple
Subject: Re: [QUESTION]: How to speed up the LASER 128 repeat-key...
Message-ID: <378@h.cs.wvu.wvnet.edu>
Date: 6 Jun 89 16:03:19 GMT
References: <18970@cup.portal.com>
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From article <18970@cup.portal.com>, by Sirald@cup.portal.com (Andrew Lionel Dalrymple):
> ____________________________________________________________
> 
> Hello,
> 
> 	Would any h/w tech-types know WHAT it is in the LASER
> 128 that I need to tweek to speed up the repeat key?  It goes
> much too slow for doing things like the underline boarders
> you see above and below my message.
> 

According to the Laser 128 Technical Reference Manual, autorepeat
at a *fixed* rate is provided by the keyboard encoder.  The
keyboard encoder for the 128 (and 128/EX) is an 8048 chip,
which is a simplified 8080 with 1K ROM (not PROM) on chip.
Most likely the speed is encoded in the ROM and cannot be changed
unless you can produce an 8048 with a modified program.  It is
a general purpose CPU; there is no place for an external
timing input.
Jim Mooney				Dept. of Stat. & Computer Science
(304) 293-3607				West Virginia University
					Morgantown, WV 26506
INTERNET: jdm@a.cs.wvu.wvnet.edu