1 Jun
2014
1 Jun
'14
11:48 p.m.
I've got a PDT-11/150 and would like to get something I can boot on it.
Thanks!
Eric
10:43 a.m.
I know that I have a PDT-11/xxx (can it be anything else than 150?).
I will check the xxx and whether there is a floppy disk in one of the
drives ... else I have to say "me too" :-/
- Henk
-----Oorspronkelijk bericht-----
From: Eric Smith
Sent: Monday, June 02, 2014 5:48 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: wanted: PDT-11/150 bootable disk image (or actual disk)
I've got a PDT-11/150 and would like to get something I can boot on it.
Thanks!
Eric
11:05 a.m.
I think that the PDT-11/150 should boot a regular RT-11 floppy, shouldn't it? I recall
seeing one or two drivers related to the PDT-11 listed last time I did a sysgen. The RX02
on my PDP-11/03 system isn't working reliably yet, so I can't build a floppy for
you at the moment. :(
I have a pair of incomplete PDT-11 systems that I'm hoping to build at least one
working system from. I don't recall whether they're marked as PDP-11/110 or
PDT-11/130. They're the style with the card cage and a dual TU58 drive mounted inside
a VT100 case. One is missing the backplane. The other is missing a metal frame behind the
backplane and the plastic cover over the card cage. Both are missing the com port card
that plugs in to the VT100 motherboard, and neither has the card support bars. I should be
able to fabricate a com port card replacement if necessary.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
12:16 p.m.
On Mon, Jun 02, 2014 at 08:05:25AM -0700, Mark J. Blair wrote:
I think that the PDT-11/150 should boot a regular RT-11
floppy, shouldn't it?
Nope! The RXT11 controller is annoyingly not quite compatible with the
RXV11, even though it's generally similar. So the PDT boot disk needs
COPY/BOOT:PD RT11FB.SYS DX0: (supposing you're making it on a typical
11/03 system) since the DX: bootstrap and driver won't work. The
monitor (SJ or FB) *is* vanilla though.
I've got a triple boot block (DX:, DY:, PD:) on ftp.dbit.com, but I suppose
it's too late to go back in time and fix this silliness! :-)
John Wilson
D Bit
8:40 p.m.
On Mon, Jun 2, 2014 at 10:16 AM, John Wilson <wilson at dbit.com> wrote:
Using that boot block, is it possible to boot the same RT11 disk on any of
the three?
the PDT boot disk needs
COPY/BOOT:PD RT11FB.SYS DX0: (supposing you're making it on a typical
11/03 system) since the DX: bootstrap and driver won't work. The
monitor (SJ or FB) *is* vanilla though.
Thanks for that info. I'm not knowledgeable enough about RT11 to figure
that out.
I've got a triple boot block (DX:, DY:, PD:) on ftp.dbit.com
10:48 p.m.
On Mon, Jun 02, 2014 at 06:40:57PM -0600, Eric Smith wrote:
Unfortunately not. They aren't RT-11 boot blocks, but my own little project
that loads a secondary boot which pulls a single .SAV file into memory and
starts it. (I was intentionally doing things differently to reduce the chances
that my code would just happen to come out looking like DEC's copyrighted
boot blocks.) But it'd be a fun project to try to hack it into an RT-style
boot block and combine it with a three-in-one driver for the system disk.
It's just so stupid that mostly identical disks may or may not boot...
John Wilson
D Bit
I've got a
triple boot block (DX:, DY:, PD:) on ftp.dbit.com
Using that boot block, is it possible to boot the same RT11 disk on any of
the three? 
2:48 p.m.
I think the PDT-110 was the VT100 based with the .TU58s, and the PDT-150
was the RX02 based unit. The RX02 drives had a red stripe on the handle
because they were a little different than the regular RX02.
They both ran a stripped down version of RT11.
On Mon, Jun 2, 2014 at 10:05 AM, Mark J. Blair <nf6x at nf6x.net> wrote:
I think that the PDT-11/150 should boot a regular
RT-11 floppy, shouldn't
it? I recall seeing one or two drivers related to the PDT-11 listed last
time I did a sysgen. The RX02 on my PDP-11/03 system isn't working reliably
yet, so I can't build a floppy for you at the moment. :(
I have a pair of incomplete PDT-11 systems that I'm hoping to build at
least one working system from. I don't recall whether they're marked as
PDP-11/110 or PDT-11/130. They're the style with the card cage and a dual
TU58 drive mounted inside a VT100 case. One is missing the backplane. The
other is missing a metal frame behind the backplane and the plastic cover
over the card cage. Both are missing the com port card that plugs in to the
VT100 motherboard, and neither has the card support bars. I should be able
to fabricate a com port card replacement if necessary.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
7:42 p.m.
On Mon, Jun 02, 2014 at 01:48:40PM -0500, Paul Anderson wrote:
I think the PDT-110 was the VT100 based with the
.TU58s, and the PDT-150
was the RX02 based unit. The RX02 drives had a red stripe on the handle
because they were a little different than the regular RX02.
I should know better than to talk w/o looking stuff up first (I only
ever had a /150), but I believe the /110 is VT100ish and diskless/tapeless
(downline boot only), the /130 is VT100ish with the TU58s, and I'm sure the
/150 is a cube with RX01s (not 02s) and I think there was supposed to be
a single-drive variant if two SS SD drives were too luxurious for you,
but I never saw that in person.
The /130 and /150 use the same PD.SYS driver in RT-11, with help
from standardized ROM which handles the HW-specific
stuff (either a
not-quite-RXV11 at 177170, or even weirder, a not-quite-DLV11, also
at 177170).
John Wilson
D Bit
8:32 p.m.
On Mon, Jun 2, 2014 at 12:48 PM, Paul Anderson <useddec at gmail.com> wrote:
I think the PDT-110 was the VT100 based with the
.TU58s,
That's the PDT-11/130. The /110 doesn't have any mass storage.
and the PDT-150
was the RX02 based unit. The RX02 drives had a red stripe on the handle
because they were a little different than the regular RX02.
The PDT-11/150 isn't VT100-based, though you can hook up a VT-100 to it.
It's not based on either the RX01 or RX02, though it has single-sided
single-density 8-inch drives that are compatible with RX01 format and have
an interface that's sort of RX11-like, but not enough to actually be
compatible.
4:02 p.m.
On Mon, Jun 2, 2014 at 9:05 AM, Mark J. Blair <nf6x at nf6x.net> wrote:
I think that the PDT-11/150 should boot a regular
RT-11 floppy, shouldn't
it?
I haven't tried, but I wouldn't expect it to work. The floppy controller
interface is similar to an RX11, but not close enough to "just work".
Someone was kind enough to send an image for me to try.
4:05 p.m.
On Mon, Jun 2, 2014 at 8:43 AM, Henk <henk.gooijen at hotmail.com> wrote:
I know that I have a PDT-11/xxx (can it be anything
else than 150?).
I will check the xxx and whether there is a floppy disk in one of the
drives ... else I have to say "me too" :-/
The PDT-11/110 and 11/130 are built into a VT1xx terminal. The PDT-11/130
has a TU58 drive.
The PDT-11/150 is its own box with two full-height eight-inch floppy drives
(stacked rather than side by side), and is used with a separate terminal.
5:06 p.m.
I know that I have a PDT-11/xxx (can it be anything else than 150?).
I thought there was also the PDT11/110 and 11/130
Those are in VT100-lioke cases. The 110 has no local mass storage, the
130 has TU58s IIRC. The 150 is a separate box with 8" drives.
I will check the xxx and whether there is a floppy
disk in one of the
drives ... else I have to say "me too" :-/
I seem to rememebr there was a way to make a PDT11/150 boot disk using a
normal RT11 dsitribution kit. I htink there were special drivers for the
floppies and a speial boot block. Don't ask me how to do it, though.
-tony
8:51 p.m.
On Mon, Jun 02, 2014 at 10:06:04PM +0100, Tony Duell wrote:
I seem to rememebr there was a way to make a PDT11/150
boot disk using a
normal RT11 dsitribution kit.
Yes. One of the floppies in the RX01 kit is bootable on the PDT (but not
the main boot floppy, which is for an RX11/RXV11).
I htink there were special drivers for the
floppies and a speial boot block. Don't ask me how to do it, though.
COPY/BOOT:PD RT11SJ.SYS PD0: (or RT11FB.SYS)
This always annoyed me though, since my understanding is that the PDT's
I/O page is being emulated by the 8085A (which is why I/O page refs are
crazy expensive on a PDT -- like dozens of usec) so the peripherals are
all faked in firmware and it might as well have been a totally vanilla
RXV11. Well the ability to format would have been nice (it's a WDC1771,
so it could do it) but anyway the incompatibility seems needless.
John Wilson
D Bit
4:18 p.m.
On 06/01/2014 08:48 PM, Eric Smith wrote:
I've got a PDT-11/150 and would like to get
something I can boot on it.
I had one in working condition years ago, and had RT11 v4 to go with it.
All of it's in storage somewhere, but I haven't spotted any of it in
quite some time. When (if?) it surfaces, I'll try to remember to dig up
this thread.
--S.
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