Casio’s first full-size computer was the FX-9000P. It used a proprietary operating system and plug-in RAM and ROM packs. A battery-backed 4K RAM cartridge could be used as removeable storage. The CP/M-based FP-1000/FP-1100 followed with a more standard desktop configuration.
The PC-compatible FP-6000 was not sold in North America, and it’s not clear if its successor, the FP-4000, was sold there, either.
Casio is best known for its small computers, and in 1982 it beat NEC and Tandy to the market with its FP-200 notebook. The FP-200 had similar capabilities to the better-known aforementioned models but was not sold as widely.
Casio FX-9000P (1981, desktop)
Original Retail Price: $1,199
Base Configuration: Z80-compatible CPU, Casio OS, 32K RAM, integral 5-inch monochrome CRT, integral keyboard/keypad, RS-232C port, CA-BASIC in ROM
Video: 16-line x 32-column text, 256 x 128 graphics
Casio FP-1000/FP-1100 (1983, desktop)
Base Configuration: 4MHz Z80A CPU, CP/M, two expansion slots, 64K RAM, 32K ROM, keyboard/keypad, parallel and cassette ports
Video: 25-line x 80-column text, 640 x 200 graphics (PF-1000)/640 x 400 graphics (FP-1100), eight colors
Important Options: external dual 5.25-inch floppy disk drives
Casio FP-6000 (1984, desktop PC)
Original Retail Price: $2,800
Base Configuration: 8MHz 8086 CPU, MS-DOS, 256K RAM (768K max), two external 5.25-inch floppy disk drives, external 10MB hard disk drive, 12-inch monochrome monitor, RS-232C port, C86 BASIC
Casio FP-200 (1982, notebook)
Base Configuration: 4MHz 80C85 CPU; three RAM/ROM card slots; 8K RAM (32K max); 32K ROM (40K max); monochrome LCD; integral keyboard; serial, parallel, and cassette ports
Video: 8-line x 20-column text, 160 x 64 graphics Size/Weight: 12.1 x 8.6 x 2.2 inches Important Options: keypad, floppy disk drive