Re: VIC-42

On Mon, Jun 21, 2021 at 12:13 PM Michał Pleban <lists_at_michau.name> wrote:
>
> smf wrote:
>
> > Right, you can easily compare it to other chips that have been
> > previously decapped. But I don't think the 1541 gate array has been
> > decapped and the 1542 gate array could look entirely different.
>
> Do we actually know what the 1542 was supposed to be? From the "Secret
> Weapons" website it seems to me that it was just a 1541 in a charcoal
> case, in which case it's not likely it would need a different gate array?
>
> > It could just be a mask rom.
>
> In DIP40 packaging?

there're quite a few 16 bit ROMs (as in 16 bit data bus) in dip-40 packages.
But I agree, not something that was particularly common in 1983.
My feeling is that VIC-42 IC is a particularly well done fake, MOS
never used something
else than the usual numbers on ICs.

Frank IZ8DWF