test-drb May 2007

test-drb@ccmp.vtda.org

235 participants
483 discussions

by bqt＠softjar.se

Pete Turnbull <pete at dunnington.plus.com> skrev: On 20/05/2007 03:22, Jerome H. Fine wrote: >> > I have also read that the MSV11-JD and MSV11-JE boards should NEVER >> > be used together. Can anyone else confirm or deny this? > > No reason not to, except that you'd end up with an unusual amount of > memory (3Mbytes). It certainly won't hurt anything, though of course > you would need to set the start address of the lower board to the > correct value. It's settable to any 16KB (8KW) boundary. What do you mean "unusual amount"? I've been running one 11/83 like that for the last two years until today actually, when I upgraded to 4 megs. :-) I used to run my 11/84 like that as well. Currently it's shut down. Haven't had time to organize my computer room after I moved, so it just sits there... >> > I suspect that 3 * MSV11-JD boards may be used in a BA123 box with 4 >> > ABCD slots, but since I don't have any MSV11-JD boards, let alone 3 >> > of them, I can't verify this. > > I don't recall ever trying *that*, but it too would work, so long as you > set the start address of each board correctly, and again you'd end up > with 3Mbytes, which is an unusual amount. The manual just says you can > use "one or more MSV11-J memory modules", without mentioning size or > maximum number. 3 megs "unusual"? Hah! ;-) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years

help identifying unknown ISA card

by lee＠geekdot.com

> If it were a data acquisition board surely it would have ADC's not > DAC's? The use of DAC's surely implies an output board of some kind. A DAC along with a comparator, of which there appear to be a couple on the board, can easily be used for A to D conversion. Lee.

18 years

MGE EPS 2000 UPS available

by ingrammp＠earthlink.net

Ok, it's not a computer, but it's certainly computer related... i have an MGE systems 50KVA UPS available that we just removed from service yesterday. Unit has been running for 10 years ( we moved up to a newer unit ) under maintenance from MGE. This is a 480VAC 3phase input, charging a string of 40 batteries at about 512 volts, and providing an output of 220 3phase through a step down transformer. It's a big heavy thing, approx 1700 lbs for the UPS and same for the battery box, in a stage of partial disassembly now ( to get it out of the room it was in ). Best part is it's free... just come by and pick up ( liftgate truck is required... its heavy and we don't have a loading dock ) We're located in Tucson AZ. It should be a matter of nuts and bolts and having a good electrician to reassemble this fellow if you wanted to bring the whole thing up or.. if you have one of these, it's a great source of spare parts ( since they aren't made any longer ) Mike

18 years

help identifying unknown ISA card

by bear＠typewritten.org

Howdy, guys. I've got an 8-bit ISA card here that I pulled out of an IBM PC/AT 5170 machine (which apparently was a VM/PC development machine at one point, and contains program code for the PC3277/GA). I wondered if anybody could help me identify what it might be. Parts have date codes in 1985; chips of note are 32k in 70ns 4Kx4 SRAM; intel 8086, 8259, and 8254; and a pair of 12-bit monolithic DACs. I/O is by one DE9m and one DB25m. Pictures here: http://www.typewritten.org/~bear/junk/unknown-card-annot.jpg http://www.typewritten.org/~bear/junk/unknown-card-obl.jpg Ideas? ok bear

18 years

TEK 551 and 555 -off topic

by useddec＠gmail.com

I came across a good looking 551 and not so good looking 555 and some carts and plug ins. I have no interest in them. If anyone has any interest, contact me off list and I'll submit offers for you. The current owner does not ship, but I can try to. Paul Anderson

18 years

Computer stuff 1970's ish at Lucas Birmingham Gt King St ?

by dave.thearchivist＠gmail.com

Here's a few obscure pics from the 1970's I believe take the picture link Pertec tape drive and a box with System 90 on it? and what else http://www.archivist.info/collection/searchv8.php?srcdata=title&srcprog=sea… Any information gratefully received as a treat here is an Elliott 803 at Lucas http://www.archivist.info/collection/searchv8.php?srcdata=title&srcprog=sea… Dave Caroline

18 years

The Last of The Line

by bqt＠softjar.se

"Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> skrev: >> The 11/94 backplane shown in figure 1-2 in EK-PDP94-MG-001_Sep90.pdf >> shows a KDJ11-E M8981 in slot 1, an APS module M7914 >in slot 2, and >> slot 3 empty. Does anyone know for certain that this backplane it >> compatible with MSV11-J modules, and if >so in which slots they would >> go? > > We seem to have come down to one fudamental question. > That is to say whats the differnce between the backplane in an 11/84 and > that in an 11/94? > > I can confirm the actual systems were as stated above ie > KDJ11-E M8981 in slot 1 > APS module M7914 in slot 2 > Nothing in slot 3 > > So how can we tell if the first three slots in each type are compatible? Easy. By listening to me. :-) I have an 11/94 box, with an 11/84 CPU and PMI memory in it here, and running. It's the same backplanes, and the same Unibus map. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years

The Last of The Line

by bqt＠softjar.se

"Glen Slick" <glen.slick at gmail.com> skrev: > On 5/17/07, Rod Smallwood <RodSmallwood at mail.ediconsulting.co.uk> wrote: >> > OK we have a change >> > >>> > >PMI memory goes in slots 1 and 2, CPU goes in 3 >>> > >joe lang >> > >> > Rod >> > > > From my understanding of this after looking at various manuals this is > true for an 11/73 or 11/83 with an H9872 backplane in a BA23 box, but > not for an 11/84. Correct. So if people could stop assuming that an 11/84 have a q-bus, we would get a long way towards clearing this up. If people don't know about the 11/84 or 11/94, don't write answers based on your knowledge of the q-bus based KDJ11 setups. > Figure 8-6 in EK-PDP94-MG-001_Sep90.pdf shows a PDP-11/84-A backplane > with the MDM M7677 in the MDM slot, the KDJ11-BF M8190 in slot 1, a > MSV11-JB/JC M8637-BA/CA in slot 2, and a MLM load module M7556 in slot > 3. Not clear to me if the MLM in this case could be replaced by a > second MSV11-J. Yes. The MLM isn't really neccesary if you have one memory card in there either, if I remember right. But if you have two memory cards, you don't have any space left for the load module anyhow. > The 11/94 backplane shown in figure 1-2 in EK-PDP94-MG-001_Sep90.pdf > shows a KDJ11-E M8981 in slot 1, an APS module M7914 in slot 2, and > slot 3 empty. Does anyone know for certain that this backplane it > compatible with MSV11-J modules, and if so in which slots they would > go? It's the same backplane. I have an 11/94 box here with an 11/84 cpu and memory. Works just fine. Just wish I could land an 11/9x cpu as well. :-) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years

The Last of The Line

by bqt＠softjar.se

"Jerome H. Fine" <jhfinedp3k at compsys.to> skrev: >>Rod Smallwood wrote: >> >Now that makes a lot more sense. >> > >> >So PMI memory choice is: (2 Max) >> > >> >MSV11-JD M8637-D 1 MB ECC PDP-11/84 or PDP-11/83 >> >MSV11-JE M8637-E 2 MB ECC PDP-11/84 or PDP-11/83 >> > > Jerome Fine replies: > > I am not absolutely positive, BUT the probability is VERY > high that the above two PMI memory boards are ONLY for the > Qbus. I believe that you must use either the MSV11-JB or > the MSV11-JC within the PDP-11/84 system. Good catch! I didn't think of that one. Yes, you're right. In fact the -JD and -JE don't even claim to be PMI memory, but just plain Q-bus memory (according to the field guide). That's definitely not useful. You need the -JB or -JC. > It is probably confusing, but the CPU is the KDJ11-BF which > is used in BOTH the PDP-11/83 (which I have and the memory > used is the MSV11-JD or the MSV11-JE) and the PDP-11/84 > which you have. If you can find a KDJ11-BF along with two > MSV11-JC PMI memory boards, the cost will likely be much > less than a PDP-11/94 CPU. That is probably correct as well. The 11/9x cpu boards are scarce and expensive. The 11/8x cpu boards are more common and reasonably priced. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years

The Last of The Line

by RodSmallwood＠mail.ediconsulting.co.uk

Now that makes a lot more sense. So PMI memory choice is: (2 Max) MSV11-JD M8637-D 1 MB ECC PDP-11/84 or PDP-11/83 MSV11-JE M8637-E 2 MB ECC PDP-11/84 or PDP-11/83 The CPU choice is: Module Type Speed RAM ROM LTC SLU ------ ---- ----- --- --- --- --- M8190 KDJ11-B M8190-AD KDJ11-BA 18 M8190-AB KDJ11-BB 15 0 Y Yes 2 M8190-AC KDJ11-BD M8190-AZ KDJ11-BF 18 0 Y Yes 2 So..... 1. Plug in one or two memory cards. 2. Plug in a CPU card 3. Insert Bus Grant cards (Which end of the slot?) 4. Insert in Slot nine a M9302 UNIBUS TERMINATOR and a M9713 MIN. LOAD MODULE 5. Now we would have: Slot 1 M8190-Ax KDJ11-Bx 11/83 - 11/84 CPU Card Slot 2 M8637-X MSV11-Jx PMI Memory Slot 3 M8637-X MSV11-Jx PMI Memory Slot 4 M8191 KTJ11-B Unibus controller Slot 5 M7547 TUK50-BB Tape controller (Bus grant as well?) Slot 7 G7273 NPG and BUS Grant / Double Grant Slot 8 G7273 NPG and BUS Grant / Double Grant Slot 9 M9302 UNIBUS TERMINATOR Slot 9 M9713 MIN. LOAD MODULE 6. Connect up a terminal (I have several 420's) to the SLU connector. 7. Connect a TK50 drive (Which I have) to its controller. 8. Check for correct boot proms on the CPU card. 9. Switch on. Wait for smoke to clear. Look for output on the terminal. 10. Insert a bootable tape. (Which I don't have yet) All those in favor of this config say Aye! All those against email me quick, before I do anything dangerous!! Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Johnny Billquist Sent: 17 May 2007 10:07 To: cctalk at classiccmp.org Cc: Rod Smallwood Subject: Re: The Last of The Line "Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> skrev: > Well I think I understand the list. > But for clarity's sake here's the problem again. > > 1. I have a number of PDP-11/94's > 2. The first three slots are Quad Qbus 3. The missing KDJ11-EB would > have been in slot one 4. Slot two has a M9714 ALT PWR FOR KDJ11-E in > it. > 5 Slot three is empty. > 6. Slot four is a Unibus slot and has a M8191 KTJ11-B Unibus > controller in it > 7 Slot five has a M7547 TUK50-BB Tape controller in it. > 8. Slot's Six,seven and eight are empty 9. Slot nine has a M9302 > (UNIBUS TERMINATOR) at one end and a M9713 (MIN. LOAD MODULE) at the > other. > > "Your mission Mr Phelps (Should you accept it) is to replace the > missing KDJ11-EB with the lowest cost plug in alternative that will run" > > The winner gets (for the cost of the shipping) a 11/94 system unit box > as described above. Sorry, but your options are very few. The first three slots of that backplane are not Q-bus, but a special adaptation of it for the PMI memory and nothing else. You cannot use Q-bus memory on it, and no other Q-bus options either (atleast according to the manuals, I haven't tried in real life. I could check out if any signals differ, if it were real important). Second, the Unibus adapter required some special signals from the CPU-board as well. Your options are basically the 11/8x and 11/9x CPU boards. No others will originate the signals for the Unibus adapter required. Memory wise only PMI memory boards will do. For an 11/94, all memory are on the CPU board, so for those, the two PMI slots should always be empty. To make the power supply happy, you normally have some bus loads on them. If you go for the 11/84 instead, you also need to find PMI memory boards. That's the CPU/memory part of your system. You then need to configure the Unibus correctly, which means you need unibus grant cards in theright place of all empty slots. You probably also want some disk controller in that system. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years

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test-drb May 2007