Casio PB-100
The Casio PB-100 was a pocket computer from Casio .
history
The PB-100 was developed in Japan from 1982 and is a first step in the direction of "personal computers" after its predecessor, the FX-702P, was only referred to as a programmable computer by the manufacturer. Compared to its competitors, it came with a very reduced configuration, especially the 12-character display made working with the BASIC programming language very difficult.
The main circuitry consisted of two chips. CPU , ROM , display driver and keyboard controller are integrated in a CMOS VLSI chip HD61913 with an external 4-bit bus. The second main component is an HD61914, an 8192-bit static RAM, organized with 2048 words of 4 bits each.
variants
From 1983 the PB-100 was marketed by Tandy Radio Shack as the TRS-80 PC-4 and by Olympia as the OP-544.
Technical specifications
- RAM : 1 kB, expandable to 2 kB using the OR-1 module
- ROM : 12 KB
- CPU : HD61913 CMOS VLSI 455 kHz, external 4-bit bus
- Display : 1 line of 12 characters and additional characters, monochrome LCD
- Programming: BASIC interpreter
- Keyboard : 53 keys QWERTY keyboard
- Power supply: 6V 0.02W from 2 × 3V CR-2032 lithium batteries
- Dimensions and weight: 165 (L) × 71 (W) × 10 (H) mm / 116 g (with batteries)
- 12-pin expansion port for FP-12 mini thermal printer and FA-3 cassette interface
- 11-pin internal slot for memory module OR-1 (1 kB)