Casio PB-2000C ROM Modules

[xerxes]

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 card

The 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