Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!gfre
From: gfre@pawl.rpi.edu (gregory m stiegler)
Newsgroups: comp.sys.amiga
Subject: Re: 14MHz A500 -- has anybody done this?
Message-ID: <K1|^?*-@rpi.edu>
Date: 20 Nov 90 23:39:29 GMT
References: <1990Nov19.123635.42713@cc.usu.edu>
Organization: Rensselaer Polytechnic Institute, Troy NY
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Nntp-Posting-Host: pawl20.pawl.rpi.edu


>Has anybody tried the 14MHz A500 hardware hack? (Using a D-FF to divide
>Agnus' 28MHz clock by two, and connecting it to the 68k's clock in?)
>From what I hear there's about a 70% increase in speed (not 100% due to
>the custom chips still cruising at 7MHz). I've got some fairly detailed
>instructions on doing so.

Ok, first of all you are maybe looking at a 15%-30% increase.  Second:
This hack does not take into account the E-clock.  Now while this may not
cause too many problems on the 500 (I've only tried it on a 2000) it creates
major chaos in a 2000 (especially if you have expansion cards).  One other
problem you may encounter is that, since it accelerates the E-clock, your
drives will attempt to run at twice normal speed.  Hard drives will function
fine but unless you have a drive that can operate at this speed (I do), you
won't even be able to boot the system.

IF we can solve the E-clock problem I'll try to put the solution together and
post it.

--==Niemand==--