Developed by Mos Technology. later acquired by Commodore, to show the possibilities of the 6502 microprocessor but quickly discovered as the first mass-produced personal computer. Easy to extend, lots of detailed documentation. With assembler/editors, first Microsoft Basic on cassette and even a Pascal compiler, it could do a lot. The first have an original Mos Technology logo, later versions have the Commodore logo on the board, small technical differences other than more recent 6502 IC’s without the infamous ROR bug.
This prehistoric computer has no “real” keyboard and no video output, program are entered by the small hexadecimal keyboard (located in the lower right part of the picture) and results are displayed on the small LED “screen” (it can display only 6 digits). It has a simple monitor that allows one to examine & modify memory, load and save paper tape, load and save cassette tape, run and debug programs through a ‘single step’ mode. The monitor works with the built in keypad and LEDs, or a terminal like the Teletype ASR33. This 20 mA current loop is easy to adapt to RS232C and so any videoterminal can be used.
Information on the KIM-1, also reachable from the menu on the right:
- The story of the KIM-1
- KIM-1 manuals
- KIM-1 revisions
- Books for the 6502: KIM-1 and more
- KIM-1 Software
- My other KIM-1 systems
- KIM-1 first clones
- Hardware expansions
- KIM-1 Simulator
- Load papertape format
- PC utilities for 6502 KIM-1
- KIM-1 and 6502 in magazines
- KIM-1 articles and books
- My first KIM-1
- KIM-1 ROMs
- KIM-1 videos
- KIM-1 6530 Replacement
- KIM-1 Diagnostic board
- KIM-1 keyboard repair
- KIM-1 emulators
- KIM replica’s and clones
On team6502 I found a photo of a prototype KIM-1 at MOS Technology, Terry Holdt has this in his office.
The layout is different from the final product, everything seems to be present on this prototype.
The late Andrew Jacobs set up a web site with relevant 6502 information. It is lost now. This site is reproduced here...
https://www.youtube.com/watch?v=FY4wjTuzkM8 1979 - Educational trainers Educational instruments division was the...
Tiny Basic Tom Pitman's Tiny basic. Small enough to fit in the 1K KIM-1, yet a real Basic interpreter Ti...
1977 01 Tiny Basic a mini language for your micro 1977 01 What's that Digital Group Really Doing ...