Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!jgreco
From: jgreco@csd4.milw.wisc.edu (Joe Greco)
Newsgroups: comp.sys.cbm
Subject: Re: C64 IC Failure
Message-ID: <827@csd4.milw.wisc.edu>
Date: 9 Feb 89 00:14:30 GMT
References: <435@manta.NOSC.MIL> <3715@uoregon.uoregon.edu> <689@wpi.WPI.EDU>
Sender: news@csd4.milw.wisc.edu
Reply-To: jgreco@csd4.milw.wisc.edu (Joe Greco)
Organization: Starbase 74 - Starfleet Operational Support Services
Lines: 29

In comp.sys.cbm article <689@wpi.WPI.EDU>, dchen@wpi.wpi.edu (Daniel D.E. Chen) wrote:
]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?

I have NEVER seen a 28 pin 6510....

There are more components than those you listed.  If two ROMs are all
that exist, I would guess that one is a 16K BASIC/Kernal ROM and the
other is the 4K character "generator" ROM.  The 6581 and 6582, as I
recall, are identical except for some electrical characteristics.

What is a "large 40 pin MPU"?  The processor has always had 40 pins.
What is "large" supposed to mean?
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