18 Aug
2002
18 Aug
'02
6:04 p.m.
On Sun, 18 Aug 2002, Lars Buitinck wrote:
we all know that UNIX first ran on the PDP-7 and then
on the PDP-11/20,
but does anyone know anything about PDP-9 UNIX? it\'s mentioned in \"The
UNIX Time-Sharing System\" in the V7 manual:
\"The earliest [version of UNIX] (circa 1969-70) ran on the Digital
Equipment Corporation PDP-7 and -9 computers.\"
Hmmm, I cannot exactly answer that, but the PDP-7 and PDP-9 were both
18-bit machines, and somewhat compatible, I believe.
The whole line is (I believe):
PDP-4 -> PDP-7 -> PDP-9 -> PDP-15
So I guess that if you had it running on a PDP-7, you could probably
almost take the code unmodified and run it on the PDP-9.
The PDP-15 have a different bus (Unibus?) I believe, and thus,
peripherials are different from the predecessors.
This obviosuly affects the OS. :-)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol