test-drb July 2019

test-drb@ccmp.vtda.org

138 participants
116 discussions

by jnc＠mercury.lcs.mit.edu

> So my new theory is that it's the MBox (either the backplane, the > boards, or the wiring from it to connectors, etc) that is the difference > between the KL10-A and the KL10-B. So I wuz confused; the second backplane is not the MBox (which is apparently on the main CPU backplane), but an 'I/O backplane'. The one in the KL10-B is different+larger and holds the RH20s, etc. Noel

5 years

KL10-A/KL10-B differences

by jnc＠mercury.lcs.mit.edu

So I'm a little puzzled by something, and I was wondering if anyone here knows the answer. So early KL10's (KL10-A's, to be precise) only support a single DTE20, and no RH20's. Later ones supported up to 4 of the former, and up to 8 of the latter. I always supposed this to be part and parcel of the 'Model A/Model B' CPU difference, but no... EK-0KL10-02 Part 1 (no title, seems to be notes for F/S) pg. 9, says both KL10-A and KL10-B's are PA (DEC jargon for the Model A CPU - below), but the former has no RH20's, the latter does. (A note at the bottom of the page says that a PA is a 'Model A', and describes it as having "internal channels". The PV is a 'Model B' - extended addressing, larger ucode, faster clock.) So my new theory is that it's the MBox (either the backplane, the boards, or the wiring from it to connectors, etc) that is the difference between the KL10-A and the KL10-B. Can anyone confirm this and/or provide details of the differences? Pictures of the MBox in a KL10-A would be good, too. Noel

5 years

RS232 Communications HP9000 Series 320

by roger.addy＠charter.net

Hi All, First post here.? I have a HP9000 Series 320 computer with a HP Drive system.? It uses the HPL 2.1 (I think) operating system. I'm trying to get some ASCII files out of the system using the RS232 port.? The port is female DB9, so I'm assuming it's DCE.? I got an HP cable DB9 to DB25 which reorients the pins to PC standard RS232 DTE.? I can get a connection with the HP. but when I try to send a file it just shows the word "PROMPT" on the PC. I'm not sure what to do at this point.? I'm currently using Tera Term.? Any advice is appreciated. Roger Addy --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

5 years

vax stuff

by jwest＠classiccmp.org

2 PrintServer 17 2 PrintServer 17 high-capacity (1500 sheet) paper trays 3 PS17 Maintenance kits (220 V) 2-4 PS17 Toner cartridges 2 LS17 Toner cartridges 1 MicroVax 3100 1 InfoServer 1000 1 vertical SCSI storage rack Apparently in Johannesburg.. If interest contact me off-list. J

5 years

Wtd: advice upcoming visit to Bletchley Park / comp museum

by billdegnan＠gmail.com

Hi...I am arriving at Gatwick Airport this weds evening1045pm and I have a 17 hour layover. I'd like to visit the national computer museum at bletchley park about an hour north. I see I can rent a car from the airport and drive to a hotel near the museum. There are a few hotels with 24/7 desks. Concerns? Total time in England is 17 hours, 8 of which needed for sleep, plus travel to and from the airport and museum. Not sure how efficient the car rental return process is, etc. Need some buffer for unknowns Thanks in advance Bill

5 years

RALGOL - A PDP8 ALGOL 60

by chd＠chdickman.com

I played around with this algol 60 compiler for the PDP8 and succeeded in getting it to run. I have not found any other notes, so I thought that I would give a leg up to the next one that wants to work on it. -chuck -------- This ALGOL 60 implementation for the PDP8 was written by Roger H. Abbott while he was at Oxford. The bits are here: http://www.bitsavers.org/bits/DEC/pdp8/papertapeImages/russ.ucs.indiana.edu… A copy of the manual here: https://archive.org/details/hack42_ROG_ALGOL_Compiler A paper here: http://pdp8.de/download/RogAlgol.pdf Mr. Abbotts business is here: http://www.angelfire.com/biz/rhaminisys/index.html The website or the host is a bit sketchy. The business is probably defunct. I found a link that said Mr. Abbott died in the early 2000. The system is two parts: the compiler and the runtime. This is all assuming the use of OS/8. To create the SV file for the compiler: .R ABSLDR *INTRUN.BN,ALGCOM.BN,COMOS8.BN$ .SAVE SYS:ALGCOM.SV .R ALGCOM.SV To create the SV file for the runtime system/loader: .R ABSLDR *FPP.BN,ALGRUN.BN,RUNOS8.BN .SAVE SYS:RALGOL.SV .R RALGOL.SV There are other options for the FPP.BN for other hardware possibilities. FPEAE8.BN for the classic pdp8 EAE and FPPEAE.BN for the PDP8/e EAE. This needs some testings. Running an ALGOL program: .TYPE FLOAT.AL 'BEGIN' 'REAL' A,B; TEXT(1,"HELLO WORLD!"); SKIP(1); A := 3.141592; B := COS(A); TEXT(1,"A = "); RWRITE(1,A); SKIP(1); TEXT(1,"B = COS(A) = "); RWRITE(1,B); 'END' $$$$$ .R ALGCOM ROGALGOL MK40 OUT<IN*FLOAT<FLOAT SIZE 39 .R RALGOL ROGALGOLOADER INPUT FILENAME ?*FLOAT.AC ENDS 0251 ^^PHELLO WORLD! A = +0.314159E+001 B = COS(A) = -0.999999E+000 ^^PHELLO WORLD! A = +0.314159E+001 B = COS(A) = -0.999999E+000 ^^C . The source AL file must end with a few $$$$ or an odd fault code will result. The fault codes are embedded in the source files as addresses. The compiler output file has the AC suffix. After the loader runs it will pause with a ^ prompt and the user will have to enter a ^P to proceed or ^C to quit. The manual is the best description for the user.

5 years

Lots of Apple 1 computers @ VCF West

by jnc＠mercury.lcs.mit.edu

> From: Evan Koblentz > what the owners plan to do in the future. Sell the Apple I and retire to a tropical island on the proceeds, if they have any sense! :-) Noel

5 years

RL01 Platter Removal?

by w2hx＠w2hx.com

?Hi all, I have a crashed RL01 disk (very crashed). I'd like to remove it from the plastic cover to display it. I opened up the case but cannot figure out how to remove the platter? I took 4 philips screws out which only served to remove a metal ring. It seems that the handle is somehow attached to the platter and seems it is preventing me from removing the platter. Whats the trick? Thanks Eugene

5 years

KDJ11-E issue/info

by jnc＠mercury.lcs.mit.edu

> From: Nigel Johnson > Anybody have any docs on the DEC LSI 11/93 (KDJ11-E)? Info on the -E is thin on the ground. The User's Manual (EK-KDJ1E-UG-001) is available online, though, which is a start - it gives info on how to configure it, etc. > I am trying to run it in a BA23 backplane and seemingly geting bus > hangs as is there is something that it is looking for that is not > there! QBUS 11's are pretty resistant to hangs, unless you have an interrupted grant chain. A simple missing device should give a NXM fault. I"d try getting the whole system working with another CPU, and then plug in the -E; reduce the number of unknown variables. Although with memory and console line on-board on the -E, it shouldn't need too much else for at least basic functioning. Noel

5 years

Wtd: advice upcoming visit to Bletchley Park / comp museum

by harper＠secureoutcomes-hq.com

Bill, If I were on such a tight schedule, I would as you say rent a car, but one-way, from Gatwick - drive that night late to a hotel in Milton Keynes about five miles north of Bletchley. About 90 miles Gatwick to Milton Keyes - two hours or so late at night. Avis has a return site at Milton Keynes. Leave the car there at Avis. Thursday morning, I would take a taxi to Bletchley Park - the place opens 0930. Spend 1.5 hours or some such max at Bletchley - Train back to Gatwick. I know that you can easily get to London Euston from Bletchley - trains run about every twenty minutes I recall, but I do not know how to get to Gatwick from Euston - figure that out. It would all be very tight, but Bletchley Park is an amazing place to see and only 1.5 hours there would be better than nothing. Here is a snap I took of the "Mansion" when there 15 years ago: http://frobenius.com/bletchley/bl012.jpg If I could see only a couple of things: Hut 8 where Turing used to do his thing and, of course, the Colossus rebuild. It is easy to spend two days there, which I did 2004. Best, Jack Harper Evergreen, Colorado USA At 03:54 AM 7/6/2019, Bill Degnan via cctech wrote: >Hi...I am arriving at Gatwick Airport this weds evening1045pm and I have a >17 hour layover. I'd like to visit the national computer museum at >bletchley park about an hour north. I see I can rent a car from the >airport and drive to a hotel near the museum. There are a few hotels with >24/7 desks. Concerns? Total time in England is 17 hours, 8 of which >needed for sleep, plus travel to and from the airport and museum. Not sure >how efficient the car rental return process is, etc. Need some buffer for >unknowns >Thanks in advance > >Bill ---------------------------------------------------------------------------------- Jack Harper, President Secure Outcomes Inc 2942 Evergreen Parkway, Suite 300 Evergreen, Colorado 80439 USA 303.670.8375 303.670.3750 (fax) http://www.secureoutcomes.net for Product Info.

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test-drb July 2019