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Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!lll-lcc!well!msudoc!conklin
From: conklin@msudoc.UUCP
Newsgroups: comp.sys.tandy
Subject: Turbo Model III
Message-ID: <1331@msudoc.UUCP>
Date: Wed, 8-Apr-87 00:55:07 EST
Article-I.D.: msudoc.1331
Posted: Wed Apr  8 00:55:07 1987
Date-Received: Sat, 11-Apr-87 04:39:33 EST
Reply-To: conklin@msudoc.UUCP (Terry Conklin)
Distribution: world
Organization: Michigan State Univ., Engineering, E. Lansing
Lines: 30
Summary: Speeding up the Mod III with faster clock rates


Ok Mod III/IV owners - a question for who's out there and for once, I get
to ASK someone!
 
Not exactly, as usual. Someone asked me about modifying a Mod III for high
speed clock/operation. I have both my Mod I's cranked right along at 200%
overspeed and have worked out the mechanics of cranking them to 300%
overspeed (mostly by replacing the slow ROMS sent with it with 1 12k EPROM
that is new technology.) A Mod III
over friend decided that this 3.54 and
up to 5.31 Mhz stuff was too much to pass up, and wants to know if he can
modify a Mod III the same way. Since a Mod III is port mapped, where a Mod I
is memory mapped, my natural feeling is that this will not only work, but
work better than a Mod I. But I'm not familiar with the cuts and what else
is involved in the mod. 
 
Has anyone out there turbo-d a Mod III? I'm already familiar with the Mod IV
 upgrade, as a friend has his Mod IV clipping along at an amazing 6 Mhz 
(amazing he says? You haven't seen fast till you see software, coded to be
fast on a 1.77 Mhz Mod I (like Visicalc) run on a 6 Mhz Mod IV!)
 
I'm looking for details, not possibilities, since I know it can be
done. I'd just rather not re-invent the wheel.
 
Terry Conklin
ihnp4!msudoc!conklin
Operating the Club Network
The Club (517) 372-3131
The Club II (313) 334-8877 <== with many megs of Mod I/III software.
The Club III (714) XXX-XXXX not final until next week.