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N > NCR  > Decision Mate V     

Decision Mate V

An other CP/M / MSDOS hybrid system. This computer had no great commercial success.

The Decision Mate V came with 128 KB of RAM, but could be upgraded to 256 or 512 KB with expansion cards. The serial and Centronics interfaces were not on the mainboard, but were added as expansion cards. An additional card with a 68000 was developed by NCR in order to use CP/M 68.

There were 7 expansion slots. An optional diagnostic card was available for slot 6. Otherwise, diagnostics were produced through 6 red LEDs on the back of the case, above the volume control.

The computer had two floppy drives, or only one + a Winchester hard drive mounted in the second bay.

A network called 'DecisoNet' was designed to link together several Decision V.


Contributors: Sebastian Rho.



I was an NCR employee for 33 years and served under Don Coleman in Millsboro, De, having transferred from NCR WHQ, Dayton. After Deleware, I transferred to Liberty, SC, and was one of 8 that transferred U.S. production of the DM-V fron Augsburg to Liberty, (E$M-Clemson), SC. Coleman was one of the best NCR people I ever worked under.

Saturday 13rd June 2015
Paul C Daily (United States)

I too used to work for NCR (marylebone road,uk) back in the 1970s and I remember using one of these machines as well as NCR315s and Centurys. The DMV if I remember correctly ran a word-processing package called from Wordstar using a sort of HTML-like command language for formatting.

Happy days! What a pity that NCR never had the success it deserved in the mainframe and mini-computer market.

Saturday 7th February 2015
Martin W (UK)

Hi everybody, the DMV is one of the drivers within the MESS Emulation framework. The DMV driver now boots CP/M-80, but a lot of other aspects are still not emulated.

What with a lot of the old machines failing, I consider emulation an excellent way of preservation.

You can find the relevant thread on the MESS Forum here:$showflat$Number$75773$page$20

It would be great if somebody with knowledge of the DMV and C++ programming could chime in and help to advance the emulation, e.g. move the DMV driver to use slots, get the graphics mode of the display controller going, ...

I''m also looking for a scan of the "System Technical Manual MS-DOS".


Monday 7th July 2014
rfka01 (Germany)


NAME  Decision Mate V
TYPE  Professional Computer
YEAR  1984
KEYBOARD  Typewriter type 91 keys with 20 programmable function keys and numeric keypad
CPU  Zilog Z80 - Optional Intel 8088 or Motorola 68008
SPEED  4.88 MHz (8088) / 4 MHz (Z80)
RAM  64 kb, 128 kb, 256 kb or 512 kb depending of models (through expansion cards)
VRAM  32 KB (monochrome mode) or 96 KB (colour mode)
ROM  Unknown
TEXT MODES  40 or 80 columns x 25 lines
GRAPHIC MODES  576 x 432 dots
COLORS  Monochrome built-in display (green / black)
SOUND  Beeper
I/O PORTS  Centronics, RS232, 7 expansion slots
BUILT IN MEDIA  One or two floppy disk drives (320 KB each), 10 to 30 MB hard disk
OS  MSDOS 2.1, CP/M or CP/M 86 or CP/M 68K
POWER SUPPLY  Built-in power supply unit
PRICE  Unknown



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