Subject: RE: PDP-11 thoughts
To: Johnny Billquist <bqt@Update.UU.SE>
From: John Hayward <John.C.Hayward@wheaton.edu>
List: port-vax
Date: 11/14/2000 07:33:58
> The PDP-11 is a 16 bit machine, period. That means you can only address
> 64k bytes. Nothing strange about that.
As I recall some PDP-11s (11/70 I believe) had an instruction/data space
separate mapping so that your instructions could be in 1 64k area and your
data in another.
I know however that the RSTS/E operating system running basic+ programs
had a 16k word interpreter and the space for your basic+ code plus data
was restricted to 16k words. With each word being a 2 byte quanity this
is a total of 64k bytes.
johnh...