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+--- Thread: Casio PB-2000C ROM Modules (/thread-8677.html)
Casio PB-2000C ROM Modules - blackjetrock - 07-12-2017 06:41 AM
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/hpmuseum/archv021.cgi?read=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
RE: Casio PB-2000C ROM Modules - xerxes - 07-18-2017 02:43 PM
Hi Andrew,
Diego is right with the 45 pins. I assume a oversight in the service manual. You will find some useful information
about the PB-2000C hardware at http://www.pisi.com.pl/piotr433/pb2000he.htm like this:
Code:
01 - VSS 16 - IO5 31 - A17
02 - A12 17 - IO6 32 - GND
03 - A7 18 - IO7 33 - ROM3
04 - A6 19 - GND 34 - GND
05 - A5 20 - ROM2 35 - GND
06 - A4 21 - A10 36 - NC
07 - A3 22 - RD 37 - NC
08 - A2 23 - A11 38 - NC
09 - A1 24 - A9 39 - NC
10 - A0 25 - A8 40 - NC
11 - IO0 26 - A13 41 - NC
12 - IO1 27 - WR 42 - NC
13 - IO2 28 - A14 43 - NC
14 - IO3 29 - A15 44 - P1
15 - IO4 30 - A16 45 - GND
pin 20 - ROM2 chip enable (gate array pin 3)
pin 33 - ROM3 chip enable (gate array pin 4)
pin 44 - microprocessor port P1, senses the card presence, connected to VSS inside the cardThe connector of the PB-2000C ROM cards is identical to the "IC ROM cards" for the CASIO Digital Diary series.
http://casio.ledudu.com/pockets.asp?lg=eng&serie=810