C64 board ROM chip spacing

From: Michał Pleban <*lists_at_michau.name*> Date: Thu, 02 May 2013 13:12:51 +0200 Message-ID: <51824A33.4020708@michau.name> · lists_at_michau.name

Hello!

I am building a ROM replacement for the C64, and I am finalizing the PCB
layout. The PCB will be plugged into the sockets for all three ROMs
(CHAR, KERNAL and BASIC), so I need to know the exact spacing between
these ROM chips.

I have the ASSY 250425 (old) board, with three DIL24 sockets. I measured
that they are spaced 0.2" apart.

Then I have the ASSY 250469 (new) board, with one DIL24 and one DIL28
chips. They are also spaced 0.2" apart.

Unfortunately I have no other boards. From what I saw in various photos
found in Google, all the other boards should also follow one of these
two ROM layouts and spacing, but I am not sure. And I have no idea about
the SX-64. Any help would be appreciated.

Regards,
Michau.

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