I also have an original distribution dectape for pdp15 dos, actually
from DEC. Looks like it has never been unspooled. Got it from a site
that didn't turn off their last '15 until almost 1990. Their application
ran on the bare metal so they didn't actually run DOS.
The way they did software maintenance was interesting.
On 03/16/2016 04:06 AM, Pontus Pihlgren wrote:
On Tue, Mar 15, 2016 at 06:31:35PM +0100, Mattis Lind wrote:
The documentation was the only thing that remained from the PDP-15
installation at Standard Radio & Telefon (part of the ITT company) that was
used for development of the ATC (Automatic Train Control) system.
An I have DECtapes from this system. I recall at least one being labled
DOS. Could the content of these tapes be of help?
In that case I should make another effort to dump these tapes (I have
dumped a few).
/P
/Mattis
2016-03-15 17:46 GMT+01:00 Bob Supnik <[email protected]>:
I've pulled together the hardware pieces for the PDP-15/76 (PDP-15 with
UC15 PDP-11 IO processor), so now it's time to consider what software can
be run.
The most likely candidate is XVM/DOS-15. While vanilla DOS-15 had UC15
support at some point, neither a complete source kit nor the appropriate
restore DECtape images seem to be available. The XVM/DOS-15 kit has all
required DECtapes, but it lacks the paper-tape elements. Fortunately, these
exist in source form in the XVM/DOS-15 source kit.
ABSL11 - a PDP-15 read-in mode tape that allows PDP-11 absolute binary
tapes to be read into shared memory and moved to private memory. (This is
not strictly necessary, because the PDP-11 side has its "hardware" binary
loader via the LOAD command.) This is used to load PIREX. It must be
assembled on the PDP-15.
PIREX - a PDP-11 absolute mode tape that runs the PDP-11 IO executive. It
has to be assembled on an -11, so the source must be loaded into an RT11
system, assembled, and punched out as a binary paper tape image. It's
possible that the macro11 cross assembler could be used instead.
DOSSAV - a PDP-15 binary tape that restores a distribution kit (usually
two DECtapes) to RF, RP, or RK disk. It must be assembled on the PDP-15. It
uses PIREX.
RKBOOT - a PDP-15 read-in mode tape that uses PIREX to boot a PDP-15
operating system off the RK15 (an 18b RK11). It must be assembled on the
PDP-15. It uses PIREX.
/Bob
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