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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.


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

@Gordon $ I own one OC-8820 but that seems to have problems at start up. Taking a look to the manuals could help. Any change to be able to get a scan of them?

Please write me at francesco $dot$ nidito $at$ gmail $dot$ com

Tuesday 21st August 2018
Francesco Nidito (Italy)

Wow what a time warp! I sold about 15 of these computers in 1982 and 1983. I remember one of the Sales guys decided to develop a Dungeons and Dragons game in Basic after hours because otherwise this pc only had a few business applications. btw$ SuperCalc was the spreadsheet program available.

Morristown Branch! Where are all you guys now? Mark Ricciardi, Kevin Haney, Steve Shustak, Tom Corzine, Gary, Joe, Martha. Good times!

Monday 16th December 2013
Chris C  (Phila, PA )
Performance Years


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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