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L > LITTON - MONROE > OC-8820   

Litton - Monroe

The Monroe OC-8820 was an all-in one Z80 based system featuring 128 to 256 KB of RAM, a monochrome CRT and a dual 5.25" 300 KB floppy disk drive.

It used its own multitask operating system, but a CP/M OS could be acquired separately along with a specific Monroe BASIC interpreter, Dbase II, Wordstar and a spreadsheet (probably CalcStar). Even under CP/M, You could run the a Spreadsheet report and still run Wordstar.

A 10 MB hard-disk drive unit was also available.

The Monroe computer family also had a color graphics model, but we have no information about it.

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


In ''83 I used to sell and install Monroe OC-8800 computers. They had the 8810 with 2 floppy drives and the 8820 originally came with a 5 meg full height hard drive. Units were manufactured in Lexington, SC, a Monroe owed assembly plant that operated at 50 degrees with the lights off (robotics). My first sale was to Woody Bilton Ford in St. George, SC. A company in Litchfield SC had a great auto dealer F$I package. The bought the 8810 with a Diablo daisy wheel printer. My next sale was to C$S Bank (now Wachovia (Wells Fargo)). Again, another F$I package with the Diablo printer, Word Star, D-Base, and Supercalc. Monroe also had a Tobacco package that would print the purchase order (oki dot printer) and the check (Diablo) at the same time. Sold like hotcakes. The following year Monroe came out with an 80186 processor machine with “Open Office” by Software Products International”. Open Office did everything MS Office did, but better. Office 2000 was about the same. I sold the fool out of that one too. But IBM came out with the 80286, Monroe bet the farm on 80186, and that was the end of Monroe computers. However. Monroe did a great job of making computers useful for business.

Wednesday 20th July 2011
GregUnit (Charleston, SC)
Active Technologies

Actually the OC8820 was a dual drive. The 5MB drive which was either a Mini Scribe or Seagate was detached and had a lead shielded cable that weighed a ton. I want to say the 8810 was a single drive. I worked out of the San Carlos and then San Francisco office for several years for Monroe and sold a number of those systems. The DB software was Condor and the spreadsheet software was Supercalc and of course the word processing was Wordstar.

Friday 9th April 2021
Bill Thane (United States)

Hi everyone! I''m repairing a Monroe MCA200, which is similar to the OC8820. I have thought that they are the same machine, but after an analysis of the pictures that I have found here, I see several differences in the mainboard. I have uploaded a BIOS dump here Any questions or comments are welcome, regards!

Thursday 18th March 2021
Alejandro (Argentina)


NAME  OC-8820
MANUFACTURER  Litton - Monroe
TYPE  Professional Computer
YEAR  1982
BUILT IN LANGUAGE  The Monroe BASIC was an extended version of the BASIC used in the Luxor ABC80/ABC800 computers.
KEYBOARD  Typewriter type, 93 keys with numeric keypad & function keys
CPU  Z80
SPEED  Unknown
RAM  128 to 256 KB
ROM  Unknown
TEXT MODES  80 columns x 25 lines
COLORS  Monochrome amber
SOUND  Unknown
SIZE / WEIGHT  Unknown
I/O PORTS  1 parallel and 1 serial port
BUILT IN MEDIA  2 x 300 KB 5.25 floppy-disk drives
OS  Proprietary Monroe OS called OS8MT (MT for multi-tasking), CP/M
PERIPHERALS  10 MB hard-disk unit
PRICE  about $3,000

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