cc40

The Texas Instruments Compact Computer 40 or CC-40 is a battery-operated portable computer that was developed by Texas Instruments and released in March 1983. Priced at US$249, it weighs 600 grams (22 ounces) and can be powered by four AA batteries or an AC adapter. It was intended as a portable business computer, and uses TI's TMS70C20 CPU, an 8-bit microprocessor that runs at 2.5 MHz.
The CC-40 has 6 kilobytes of on board Random Access Memory (expandable to 18 KB), 34 KB of Read Only Memory, and a 31-character LCD display. It is capable of operating for 200 hours off one set of batteries, and memory is not erased by powering the unit off, so an unpowered unit can retain data for several months.
The CC-40 has a single Hexbus port for connecting peripherals. The following Hexbus peripherals were released: 80 column printer, printer/plotter, RS232, and modem. A digital "wafertape" unit (a licensed version of the Exatron Stringy Floppy) depicted on the computer's box was only released as a prototype, reportedly because it proved too unreliable. The inability to store data permanently hurt the CC-40's sales.
Software was only available on cartridge or by typing programs into its built-in BASIC interpreter. The BASIC interpreter is similar but not identical to the TI-99/4A.

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