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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!


Please consider donating your old computer / videogame system to Old-Computers.com or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


 

How to connect KIM-1 just to regular PC or Laptop

          
Sunday 5th March 2023
Don DeGregori (US)

Need help with book

          
Thursday 24th February 2022
Jeff Nay (USA)

I recently built a Kim Uno which while it is not a Kim-1 provides a very nice emulated environment to play in and it can be build for about $18 in parts and the whole project is open source. Has anyone used this? I would like to enter some programs into $0400 but found that is where the ROMs usually were mapped. My unit will not allow me to write there, but I had read posts that you should be able to hold Rst for 1 second and that allows you to write to the non-volatile area of the Uno. Has anyone else walked this path? On the Strugglebus.

          
Tuesday 14th December 2021
Eric Andresen (United States)
http://www.ericandresen.me

 

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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