I just picked up an 11/73 from a company that will also discard
the dual cabinet which contains 2 * RL02 drives. If you are going
to move on this, it MUST be before the end of September. They
are in Toronto and local pickup will be required. Is anyone interested?
Sincerely yours,
Jerome Fine
<Remember.. the *PDT* was supposedly a smart terminal (at least the
<11/110 and 11/130 were little more than that)
That was the plan. I found that the 11/130 I have runs RT-11 quite
nicely and it's the fastest of the tu58 based systems (uses an oddball
parallel interface tu58).
<It is a member simply by virtue of the fact that the CPU is the same
<architecture. Nothing that was done in the PRO precluded that... it
<just took a little more programming to control anything since you had
<to program the interrupt controller...
Think of it as more flexible... runnin for the door. ;)
Seriously the hardware boys seemed to be just a touch off center for the
realm. Even the VT180, a very good CPM engine design they left off
two sided (rev-H has it but I've never seen a real one) and that crippled
disk expansion to the denser two sided media.
Allison
<The only problem with that plan is that with a CPU card (say, a KDJ11-A),
<memory and serial lines courtesy of an MXV11-B, and some sort of disk
<controller like an RQDX3 and the power draw crowbars the power supply.
<At least it has done so on every BA11-VA that I've tried...
I've always run out of slots before running out of power.
the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't
mind using a tu58 to boot it!
<Well, they certainly aren't *typical* pdp-11s with a boot console that
<can be programmed like any other, or interrupts which work like other
<ones, and the console takes lots of code to emulate a VT100, that's for
<sure...
For the pro350, not so for the PDT11/1xx.
<they also have a *64*Hz clock... In RT-11, the clock interrupt service
<drops one clock tick out of every 16 -- so it only processes 60 clock
<ticks a second... :-)
Someday the hardware boys will get it.
Allison
I have just acquired a SOL-20. I will entertain appropriate trades for
it for a couple days before it goes on the block. If you are going to
VCF 3.0 or come thru LA, shipping can be avoided.
Regards,
Elmo
>Didn't check the MicroPDP-11 book on this one. All the 11/53 boxes I've
>seen either had 11/23B or the earlier no ram-nonPMI 11/73 cpu in them.
>Apparently that was a common configuration or the common path for the
>used boxes. in any case most of the 11/23 or 11/73 cpus work quite
>nicely in that box.
That may be the *boxes* which have been marked that way... which sounds
like someone was mislead (or the system reconfigured without someone
knowing)
*NO* 11/53[+] board that I know of has EVER had an F-11 on it. They
have all had J-11 (DCJ11) chips. The 11/53[+] has always been a quad
width board with two serial lines and either .5Mbyte (11/53) or 1.5Mbyte
(11/53+). It is known as the KDJ11-D (the -A is the dual-width
11/73 board, the -B is the quad width 11/83,84 board and the -E is
the quad width 11/93,94 board).
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Hi guys,
I'm new here, so be gentle! =;-)
I'm hopefully about to acquire a PET 8032 - the first PET I've ever owned
(I was six years old when they first came out). I'm told that it boots into
Basic 4.0, but the boot details are shown in lower case with the odd
incorrect character. Also, when typing, some characters come up on the
screen differently to the ones actually typed.
The vendor suggests it may just need a clean and the I/O chip re-seating -
but if it's something more complicated, is it still possible to buy
replacement chips? And, thinking longer-term, are replacement screens
possible to find these days (e.g. are they a standard size that you can
still buy off-the-shelf)?
Any suggestions gratefully received!
Gareth
>I seem to remember it being in a Terminals/Comms handbook (which I can't
>find at the moment :-(), where it claimed that the PDT11 was _not_ a
>PDP11, since it didn't have a Unibus/Qbus on it.
Remember.. the *PDT* was supposedly a smart terminal (at least the
11/110 and 11/130 were little more than that)
>The PDP11 Architecture Handbook is inconsistent. It describes the 'Two
>PDP11 Expansion Buses' but also calls the PRO300-series 'A PDP11 family
>member'.
It is a member simply by virtue of the fact that the CPU is the same
architecture. Nothing that was done in the PRO precluded that... it
just took a little more programming to control anything since you had
to program the interrupt controller...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
>What about a BA11-V? That's a 4 (dual-height) Q-bus slot box. I'm sure
>the backplane can be made into a Q22 one if it isn't already. Then fill
>it with a CPU card, memory, serial ports and (say) a SCSI card.... Or
>even use it with a TU58 (it's the same physical size as the TU58, and the
>units are designed to stack).
The only problem with that plan is that with a CPU card (say, a KDJ11-A),
memory and serial lines courtesy of an MXV11-B, and some sort of disk
controller like an RQDX3 and the power draw crowbars the power supply.
At least it has done so on every BA11-VA that I've tried...
The only configuration I was able to get to work was two BA11-VAs, with
the Qbus jumper, CPU and MXV11-B in the first box and the RQDX3 and
DELQA in the second box... And that didn't reliably power-up
>At least one DEC book claims that a PDP11 has to have either a Unibus or
>Qbus expansion bus, and that the PRO3xx and PDT11s are not PDP11s because
>of this (for all they run the same instruction srt).
Well, they certainly aren't *typical* pdp-11s with a boot console that
can be programmed like any other, or interrupts which work like other
ones, and the console takes lots of code to emulate a VT100, that's for
sure...
they also have a *64*Hz clock... In RT-11, the clock interrupt service
drops one clock tick out of every 16 -- so it only processes 60 clock
ticks a second... :-)
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Last-minute message:
The monthly TRW ham radio and electronics swap meet will be held
tomorrow, Saturday the 25, from 7:30 -> 11:30 Am USA/PST.
From the 405 (San Diego) fwy, take the Rosecrans exit West to
Avaiation, turn Left (south) and go about 1/2 mile... the Meet will
be on your right, in the southernmost parking lots.
Look me up: I'll be in spaces J21 and J23... Marvin will be there too.
Cheers
John
>I've got a few unibus cards that I can't find in the various on-line
>references, does someone have an early-70's handbook around that could
>give me some tips?
>G103
Memory voltage levels for MM11 and ME10
>G225
Current source for ME10 and MM11
>G226
XY selection switch for ME10 and MM11
>M2860
>M4801
I'm stumped by these two.
>M7290
In my book, this is simply labeled "M729 for 980 nsec memory".
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
