Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!ames!ptsfa!ihnp4!ihlpg!jccf
From: jccf@ihlpg.UUCP
Newsgroups: comp.sys.mac
Subject: How to speed up the MAC ??
Message-ID: <3053@ihlpg.ATT.COM>
Date: Thu, 26-Mar-87 03:00:09 EST
Article-I.D.: ihlpg.3053
Posted: Thu Mar 26 03:00:09 1987
Date-Received: Fri, 27-Mar-87 07:16:07 EST
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 15
Keywords: DTACK, waitstates, DRAM

I've upgraded my mac with some 256 chips, with an access time of 120 ns.
My question is: How can I speed up the performance of the mac when
executing program's or fetching data in RAM. Since the mac adds a wait 
cycle for every memory cycle, it should be possible to change the 
wiring of the  68000 DTACK signal in such a way, that waitcycles are
not added any more in RAM.
The DTACK signal is generated by one of the PLA's, so finding out
where to start is very difficult.
Any help appreciated.

Piter Jonker
ihnp4!ihlpg!hvlpa!pjonker      <---- Please respond to this address or via news
Hilversum,  Holland.

(Designing Tulips on a MAC was not successfool, the were all black 'n white)