Casio PB-2000C ROM Modules

[blackjetrock]

Hi,

I've finally got enough parts together to attempt a ROM module for my Casio PB-2000C, as mentioned in this thread:

http://www.hpmuseum.org/cgi-sys/cgiwrap/...ead=215778

I have the service manual, but there's a few problems:

1. The service manual indicates a pin 46, but Diego mentions a 45 pin connector
2. The exact size of the module and the orientation of the pins isn't in the service manual
3. I was wondering what the CO pin was wired to (pin 44).

I've had a go at disassembling the PB2000C but it's not easy to get to the ROM connector and I don't want to damage my one example of this machine. I may create an extender board so I can get a scope onto the pins, there's not a lot of room in that slot.

I think you can see where I'm going with this...

Diego, would you (or anyone else who's done this) be kind enough to elaborate on your DIY ROM module?

Regards

Andrew