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M > MOS TECHNOLOGY  > KIM 1   


MOS TECHNOLOGY
KIM 1

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.

It is possible to connect the KIM to a terminal via a dedicated serial port.

Soon after release, Commodore Business Machines would buy out MOS Technologies and distribute the KIM-1 with a Commodore name on it.

Bob Leedom reports :
The KIM-1 had "no video output", you say? And the "small LED screen...can only display 6 digits"?
Not quite. The software could address each segment of the 7-segment displays in the "LED screen". As a result, tremendous ingenuity was unleashed by the KIM-1 User's Group, and the display was used for many clever things.
The editors published my version of the artificial intelligence board game (in which the computer learns which moves lose, and never makes those moves again, until it's eventually unbeatable), my baseball game (two-player or you vs computer, six kinds of pitches possible, scoreboard, men-on-base display, lots more), and my semi-successful commercial entry called KIM-venture (a tiny version of Adventure, with XYZZY-type secret word, monsters, treasures, 26 rooms, and more).
It was an amazing little computer. Mine still works!


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I met Steve Wazniak and Jobs at the 1975 MOS Technology Convention in San Francisco. The next business day afterwards, I bought two Kim-1 boards. One I used at work and the other sat in its box until today. I never even applied power to it and bought it with the plug in socket chip option. Does anyone know what this board is worth on today''s market? Thanks: Chris 323-218-1435, chris_51_m_ca@yahoo.com

          
Saturday 22nd August 2020
Chris Banda (Las Vegas, Nevada)

Tuesday, 7 Jan 2020
On the first page of this site''s KIM-1 section, I mention my hand-assembled KIM-Venture program, which runs on a bare KIM-1. I''d like to find a good place to post the user manual, source code, and cavern map for this "tiny Adventure" game. Or I''ll send it to anyone who asks! Write me at BOBkimLEEDOM at hotmail.com, but first remove the 3-character computer name from the address (added here to confound the spambots).

          
Tuesday 7th January 2020
Bob Leedom (Maryland, USA)

I incorporated a KIM-1 into USPTO patent $ 4,281,579 - issued in yr 1981. Demonstrated working prototype to US piano mfgs (who didn''t get it) but sold rights Yamaha who sold millions. Still have KIM-1 but will be listing on e-bay this week - Thursday 7/19/2012 . Will be interesting to see what it brings.

          
Sunday 15th July 2012
Tim Bennett

 

NAME  KIM 1
MANUFACTURER  MOS Technology
TYPE  Home Computer
ORIGIN  U.S.A.
YEAR  1975
KEYBOARD  Hexadecimal keyboard, calculator type
CPU  6502
SPEED  1 MHz
RAM  1152 bytes
ROM  2 KB (assembler)
TEXT MODES  6 digits LED screen
GRAPHIC MODES  None
COLORS  No
SOUND  Various square wave frequencies could be produced by software
SIZE / WEIGHT  Unknown
I/O PORTS  tape interface, bus expansion, serial (to connect to a terminal)
POWER SUPPLY  5V / 1.2A and 12V / 100mA. The 12V was only needed for the serial function
PERIPHERALS  Unknown
PRICE  $250 (USA, 1975)




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