31 Dec
2017
31 Dec
'17
7:21 a.m.
On Dec 31, 2017, at 9:41 AM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
I don't know; if not I should dig through mine and submit it to Bitsavers. I
don't have the original DECtapes, but rather a copy of the files on magtape, so
metadata is largely missing but the actual files should be there.
From: Paul Koning
RSTS-11 V4, which had a major reliability problem
... As part of trying
to keep the customer placated, DEC supplied full OS sources, 5
dectapes. ... We printed them ... I still have copies of those files.
Is that version available online? If not, maybe an OCR project? (Although I know other versions of RSTS-11 are
available, so maybe it's not
rare enough to make the tedium of OCR worth it. That has been used on a
number of systems; notably CTSS, but also the IMP code and the Apollo
Guidance Computer, that I know of. I'm currently looking into getting an
early version of MERT, and that may also come down to OCR - if we're lucky!)
Correct, it uses the MMU so it only needs 64 bytes of table space to get the low order
bits right. See attached.
paul
Stranger still is the "fancy" lights in
RSTS ... "Fancy" because it
produces a rotating pattern not just in the data lights which is easy,
but also in the address lights. It runs in supervisor mode
Ah; it must busy loop at loops spread across the address space? Clever!
(Perhaps using the mapping hardware so that it doesn't use too much _actual_
memory.) Is the source available?