Computermuseum der Fakultät Informatik german

PC-Boards Casio R1

picture: Casio R1 CPU-board

Above the CPU-board of the Casio R1. In the non green-shadowed part of the foto one can see the "embedded" AS-L: HD 3211 (timer) HD 3210 (keyboard) HD 3214 (shift register) HD 3212 (ALU) HD 3226 (AND-gates) 2*HD 3227 (address-Latch) HN 3203 (µP-ROM) Naturally the 4-Bit shiftregister and the decoder/driver for the display are missing.

picture: Casio R1 printer-board

The printer-board. It accumulates various IC-types from different families. From the old fashioned µPD 10 over HD 3118 until TM 4105. Additionally below the keybord there is a third pcb with two ICs and some additional discrete logic. Additional to the ICs mentioned above there are on the printer-board 1 µPD 10 2 µPD 13 3 µPD 101 1 µPD 102 2 µPD 304 1 µPD 308 on the printer board 8 µPD 10 1 µPD 11 1 µPD 12 3 µPD 13 2 µPD 101 2 µPD 102 2 µPD 303 1 µPD 304 1 µPD 308 1 HD 3118 1 TM 4105 on the keyboard-board 2 T 1191

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