Re: Dating a C-64 board

From: Marko Mäkelä (
Date: 1999-04-18 15:46:44

On Sat, 17 Apr 1999, Ethan Dicks wrote:

> U19, the VIC chip, has a date code of 2482 and no revision on the 6567 p/n.

Does it have the "ALWAYS SET THIS BIT TO ZERO" bug?  I don't remember
which register it was, but one bit in a VIC-II register was documented so
in at least one source.  The bit has no effect on the video chips I have;
it merely acts as a memory cell.  The register address might have been
$d016 or $d018.

> I should upload the files to funet as an example of the state of
> things circa September 1982.  It's a nice piece of vaporware.  The
> only thing that was completed for the C-64 was that demo.  :-(

It would be very nice to have the software on funet.


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