Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!sharkey!wyn386!danielw
From: danielw@wyn386.UUCP (Daniel Wynalda)
Newsgroups: comp.sys.tandy
Subject: Re: Model 4 DS drive question
Summary: make your model 4 run a 0 wait states
Message-ID: <104@wyn386.UUCP>
Date: 25 May 89 13:38:08 GMT
References: <193300134@trsvax>
Organization: Wynalda Litho Inc, Rockford MI
Lines: 20

In article <193300134@trsvax>, uhclem@trsvax.UUCP writes:
> 
> B>	   Is the only difference the DOUBLE sided drives ?
> 	The 4D has a different main logic board than the Model 4.  Most
> 	noticable differences are that the RS232 connector exits the back
> 	instead of the bottom, AND the 4D has no wait states, the 4 has one.
> 	(4D runs at the same computation speed as a 4P.)

It is possible to modify your model 4 to run at full 4Mhz 0 wait state like
the 4D does with a simple pin removal from a socket.   I am not sure which
one it is anymore but I am sure I could find it if requested.  I just
had to pull an IC from a socket, bend out a pin in the corner, and plug
it back in.  The machine became noticably faster.


-- 
Daniel Wynalda 		| Telephone: (616) 866-1561 X22	 Ham callsign: N8KUD
Wynalda Litho Inc. 	| Network: danielw@wyn386.UUCP ..sharkey!wyn386!danielw
8221 Graphic Ind Pk.	| No one should hold this company responsible for what
Rockford, MI  49341 	| I say.  After all, my ham call is pronounced "Naked".