Re: D9090 (was Re: VIC-1001 ROM sighting)

From: Ruud Baltissen (
Date: 2001-09-19 07:37:38

Hallo Daniele, Ethan,

> I looked on FUNET.  The one described there is the Commodore one.  Mine
> different inside - specifically, mine had a pair of TI IEEE-488
> chips, the C= VIC-20 IEEE cart had three of the same style that were in
> PET/CBM.  There are other differences.

The pair of TI-IC's you mention are hard to get and rather expensive. On the
other hand the MC3446 can be replaced by a 7407 (not pin compatible !!!).
The input of the 6522 now serves as input. The disadvantage of this
construction is that the moment you switch off the device, you may
experience trouble with the communication between other devices.
  / __|__
 / /  |_/     Groetjes, Ruud
 \ \__|_\

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