CP/M-86

From: Douglas H. Quebbeman <dquebbeman_at_acm.org>
Date: Wed May 1 14:50:02 2002

> On Wed, 1 May 2002, Douglas H. Quebbeman wrote:
> > > OK, so who knows the sequence and differences between:
> > > MP/M-86
> > > Concurrent CP/M-86
> > > Concurrent PC-DOS (announced by DRI at Comdex, because IBM did NOT
> > > trademark "PC-DOS" ("It's a description, not a name"), but
> > > then DRI backed down and changed the name)
> > > Concurrent DOS
> > > DR DOS
> > Very good, Fred! The answer to your question is "Fred Cisin"!
>
> Well, you confirmed my guess as to the sequence, but it wasn't a
> rhetorical question. I really DON'T know what the differences are.

Oops! My bad...

MP/M-86: multiuser, multi-terminal version of CP/M. Supports
         more memory than CP/M-86 though...

Concurrent CP/M-86:
         MP/M-86 with multi-terminal support removed. User can
         run multiple programs simultaneously.

Concurrent PC-DOS:
         Concurrent CP/M-86 with support for Microsoft loader
         conventions, Microsoft disk formats, etc. while pre-
         serving existing CP/M-86 program & media support

Concurrent DOS:
         Don't know the differences but whatever it is it's
         Concurrent PC-DOS modified to do <xyz>

DR DOS:
         Lots of support added for stuff like running mouse
         and network drivers in upper memory blocks, etc.
         Generally a catch-up revision of the previous
         product, but was already surpoassed by the latest
         Microsoft DOS.

hth,-dq
Received on Wed May 01 2002 - 14:50:02 BST