Re: Attempting to ID an odd C-64 c (?) motherboard

From: Konrad B <*konrad0x42_at_gmail.com*> Date: Wed, 10 Mar 2021 10:59:03 +0100 Message-ID: <CAB5WB+tyaQZ+29PrB5QBx9fkq1PLGDj=Xf_H9kCycK1s_4MksA_at_mail.gmail.com> · konrad0x42_at_gmail.com

> My guess is this board was supposed to replace the 250425, but they ran
> into some kind of problem(s) and had to make the 250466 as a stopgap
> until the 250469 was ready.
>
>   Gerrit
>

Looking at the board -  doesn't it have !CAS1 (pin 19 of the gate array)
connected to DRAMs CAS line ? 251715-01 has these CAS0..CAS3 lines (pins
18..21) that are gone in  252535-01, I was always wondering what they could
be for and if they could be abused...

Konrad