Click Here to visit our Sponsor
The History of Computing The Magazine Have Fun there ! Buy books and goodies
  Mistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine
Browse console museumBrowse pong museum









 

ZX Spectrum T-shirts!

see details
Ready prompt T-shirts!

see details
ZX81 T-shirts!

see details
Arcade cherry T-shirts!

see details
Spiral program T-shirts!

see details
Atari joystick T-shirts!

see details
Battle Zone T-shirts!

see details
Vectrex ship T-shirts!

see details
Atari ST bombs T-shirts!

see details
Moon Lander T-shirts!

see details
C64 maze generator T-shirts!

see details
Elite spaceship t-shirt T-shirts!

see details
Competition Pro Joystick T-shirts!

see details
Pak Pak Monster T-shirts!

see details
BASIC code T-shirts!

see details
Pixel adventure T-shirts!

see details
Breakout T-shirts!

see details
Vector ship T-shirts!

see details





L > LITTON - MONROE > OC-8880   


Litton - Monroe
OC-8880

Info needed about this obscure CP/M computer!

Monroe - a subsidary of Litton Inc. - used to produce and sell calculators for years from 1912.

Very little is known about this CP/M system. To use the floppies you had to type in OPEN FPY0:

____________

Thanks to Jan Söderberg for the pictures.



 

I tried the TeleDisk images Alejandro Daniel Perez found. Unfortunately no success yet.

I created real media with ms-dos on a 1.2MB 5.25" drive (has 80 track) and used DD 360K media, though it is not certified for 80 track. This seemed to go well, so far so good.

The OC-8880 did respond with some more messages so it was trying. Loading, but didn''t like the floppy. From the sounds the drive may be bad.

I will try to find out if the floppies are ok on a different old computer. I will try to find out if the drive is bad, if it is an 80 track drive etc. In 1981/1982 80 track wasn''t that common. Two years later it was pretty common.

BTW I will try mesuring what frequency the CPU has, and confirm if signals match Z80.

          
Thursday 28th May 2020
Knut Roll-Lund (Norway)

Hi everyone! I believe that I have found a disk image to check with this computer here: http://www.retroarchive.org/maslin/disks/misc/index.html

The image name is monroe.td0 and monroe88.tdo, if anyone can check it I would like to know if the images are working fine. I have a Monroe OC-8820 but it still under repair

          
Thursday 16th April 2020
Alejandro Daniel Perez (Argentina)

The Monroe OC8800 could probably run CP/M, but it was offered with another operating system called OS8MT which was a multi-tasking 8-bit operating system.

There was a Basic interpreter that is related to the Luxor ABC800 series computers and the Diab Basic on the Motorola Unix computers.

There''s even an MS-DOS version of that Basic named basic2pc. There are however some differences in instruction set, but those differences are minor. Search for BASIC2PC.ZIP to find it. The basic is a semi-compiling basic which makes it fairly fast when executing.

One Monroe-specific instruction that I happen to remember is "OPTION EUROPE", which allowed you to programmatically determine if there should be a comma or dot as decimal separator.

          
Friday 16th August 2019
Nils H (Sweden)

 

NAME  OC-8880
MANUFACTURER  Litton - Monroe
TYPE  Professional Computer
ORIGIN  Japan
YEAR  1981
BUILT IN LANGUAGE  Unknown
KEYBOARD  Full stroke keyboard with function keys and numeric keypad. 93 keys.
CPU  Z80
SPEED  Unknown
CO-PROCESSOR  Unknown
RAM  16 KB (128 KB max)
ROM  Unknown
TEXT MODES  Unknown
GRAPHIC MODES  Unknown
COLORS  Unknown
SOUND  Unknown
SIZE / WEIGHT  Unknown
I/O PORTS  External disk drive, expansion bus, composite video output (monochrome), AUX serial I/O, COMM I/O, parallel printer interface
BUILT IN MEDIA  One 5.25'' disk drive (300 KB)
OS  CP/M
POWER SUPPLY  PSU built-in
PERIPHERALS  Unknown
PRICE  Unknown




Please buy a t-shirt to support us !
Ready prompt
ZX Spectrum
ZX81
Arcade cherry
Spiral program
Atari joystick
Battle Zone
Vectrex ship
C64 maze generator
Moon Lander
Competition Pro Joystick
Atari ST bombs
Elite spaceship t-shirt
Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
Pixel adventure
Breakout
Vector ship

Related Ebay auctions in real time - click to buy yours







 
Click here to go to the top of the page   
Contact us | members | about old-computers.com | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -