Low-end Unix (was: TI99: Anyone reading this with a TI-99/4A?)

From: Huw Davies <H.Davies_at_latrobe.edu.au>
Date: Thu May 7 00:50:02 1998

At 09:35 PM 06-05-98 -0500, Uncle Roger wrote:
>At 02:12 PM 5/3/98 -0400, you wrote:
>><To my knowledge no flavor of unix runs on anything less than a 32-bit
>><processor. There's a unix-workalike for the C-64/128, but that's not
>>
>>Your knowledge is limited. Unix was started and lived for years on
>>PDP-11s (a 16 bit machine) in the form of V5, V6, V7 and 2.9BSD and
>>2.11BSD. I may add it was on other machines like the Interdatas.

To be strictly correct, the original version of Unix was written (in
assembler) for a Digital PDP-7 which was an 18bit computer. It was later
rewritten in B and then C which allowed a reasonably easy port to PDP-11s,
where it lived for a long while.

>I thought someone had said that CP/M was based on Unix? Or was that one
>of the PDP opsys?

CP/M looks at the user level almost exactly as RT-11 does, so my guess is
that RT-11 was the inspiration for CP/M.


 Huw Davies | e-mail: Huw.Davies_at_latrobe.edu.au
 Information Technology Services | Phone: +61 3 9479 1550 Fax: +61 3 9479
1999
 La Trobe University | "If God had wanted soccer played in the
 Melbourne Australia 3083 | air, the sky would be painted green"
Received on Thu May 07 1998 - 00:50:02 BST