MOS Kim-1
Photo 1: MOS_KIM-1_IMG_4211.jpg: Rama & Musée Bolo re-framing: Tomer T, CC BY-SA 2.0 fr, via Wikimedia Commons (MOS KIM-1 IMG 4211 cropped scale.jpg) Photo 2: public domain, via Wikimedia Commons (Kim-1-computer.jpg)
Single-board computer, 1976, MOS Technology. The KIM-1 ("Keyboard Input Monitor") was designed by Chuck Peddle to demonstrate the 6502 processor to engineers, but at US$245 it became one of the first computers that hobbyists could afford. The board has a 23-key hexadecimal keypad, a six-digit LED display, 1 KB of RAM, two 6530 interface chips with the monitor program in ROM and a cassette interface; users expanded it with memory boards, terminals and BASIC, and it was the ancestor of the Commodore PET.
| Years | 1976 to 1979 |
|---|---|
| Processor | MOS 6502 at 1 MHz |
| RAM | 1 KB |
| ROM | 2 KB monitor in two 6530 RIOT chips |
| Display | 6 seven-segment LED digits |
| Input | 23-key hexadecimal keypad |
| Storage | audio cassette interface; paper tape through a terminal |
| Ports | 20 mA current loop for a teletype, expansion connectors |
| Price (1976) | US$245 |
Documentation
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