> 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...