Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!nrl-cmf!ukma!tut.cis.ohio-state.edu!bloom-beacon!husc6!m2c!wpi!dchen@wpi.wpi.edu
From: dchen@wpi.wpi.edu (Daniel D.E. Chen)
Newsgroups: comp.sys.cbm
Subject: Re: C64 IC Failure
Message-ID: <689@wpi.WPI.EDU>
Date: 8 Feb 89 14:34:21 GMT
References: <435@manta.NOSC.MIL> <3715@uoregon.uoregon.edu>
Sender: dchen@wpi.wpi.edu
Organization: Commodore Com-Rades, Commodore Users Group, Worcester MA
Lines: 21
In-reply-to: jdrew@uoregon.uoregon.edu's message of 5 Feb 89 02:13:31 GMT
Posting-Front-End: GNU Emacs 18.41.9 of Wed Aug 31 1988 on wpi (berkeley-unix)


It's strange but I recently took a new C64c apart and found much to my
dismay the whole circuit board is changed.  The MPU, 6581 SID, and 3
ROM were replaced with a large 40 pin MPU, a 6582 SID and 2 ROMS.

I also saw something really interesting about the design, there were
little capacitor in series with each line of the joystick, probably
there to prevent "electricution" of the CIA chips.

The board itself got reduced from 5 inches to around 3 inches.

Would anyone know what the new MPU is and what is differnt about it?
It seems capatible with the 28 pin 6510.  Does anyone know I can get
the new schematic for it?

						Daniel Chen
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