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For-Sale / Items Wanted

by billdeg - 09/22/2016
Total messages in this thread: 1
NOTE: date of thread = the last update date. Note there are some old specific item for-sale threads on this site. If they're not linked from here, they're probably expired/sold. FOR SALE Kilobaud (Microcomputing) Magazines - Nearly complete set - $lets make a deal Computer Products Co DEC-compatible logic boards later 70's early 80's era stuff PDP 11/44 Mostly Commodore and Tandy stuff here History of Commodore Poster Items Wanted Free Stuff? Varies. Pickup only) Contact me if you have a specific request. NEW indicated with ... [ read more ]

Realtronics Card Punch Interface

by billdeg - 09/20/2016
Total messages in this thread: 1
Photo of an interesting interface for a card punch from late 60's early 1970's. These devices were sold by a company called RealTronics. Click image for more photos.
Cover removed. Note the large two-character Nixie tube display. Click image for more photos.
This control unit appears to be a current loop device, similar to a teletype. The RealTronics system consisted of a PDP 8i with third party hardware. I assume "Real" pertains to RealEstate, but I could only guess. ... [ read more ]

SiliconGraphics Workstations

by billdeg - 09/14/2016
Total messages in this thread: 1
SiliconGraphics O2
Three SGI O2 workstation computers. Note the variation in the labels. The left-most unit is driving the display image, Doom for SGI within the IRIX 6.5 operating system. Click image for more photos of this system.
SiliconGraphics Octane
The SGI Octane is often referred to as the O2's big brother. It has the same rounded footprint, but it's about 40% larger and more powerful. This system boots, but I am missing a hard drive sled. Click image for more photos of this system.
SiliconGraphics Indy
Pictured... [ read more ]

RCA COSMAC Microkit

by billdeg - 04/05/2013
Total messages in this thread: 10
Last Post: [ Operator Manual Clues ] 08/26/2016
RCA COSMAC
The 1975 RCA COSMAC Microkit. This is the first commercial microcomputer from RCA to contain the two-chip COSMAC microprocessor (TC 1084 / TC 1085 version). The processor was developed in New Jersey, but the kit itself came out of the RCA Palm Beach Division. Click image for larger view.
RCA COSMAC 3901822
Note the TC 1085 chip on the processor card, which is the earlier name for the CDP 1801 and has a silk screen date of late 1974. Click image for larger view.
Compare the above processor c... [ read more ]

1968 CDC List of System Installations

by billdeg - 08/20/2016
Total messages in this thread: 1
2 Full-sized rack enclosures for a circa 1965 Control Data Corporation Model 160-A Computer. CDC 160-A Control Console Click image for larger view.
The iconic twin displays of the Control Data Corporation Model 6600 Computer (Cyber 70) control console. View of CDC 6600 Racks Click image for larger view.
After my trip to the Computer History Museum in Mountain View, California I was inspired to look through my archives to see what info I had about th... [ read more ]

Vintage Computer Festival West 2016

by billdeg - 08/09/2016
Total messages in this thread: 1
I still need to finish editing the files' names (confirm what each thing actually was), create thumbnails and a post comments, feel free to take a look at the raw footage from VCF West and the CHM Exhibit Photos Computer History Museum Collection Marc W. published from the show, with his commentary: https://www...com/watch?v=2bbsgfanbE0... [ read more ]

VCFed Workshop Photos

by billdeg - 06/13/2016
Total messages in this thread: 2
Last Post: [ Univac Status Update ] 07/28/2016
UNIVAC 1532
The UNIVAC 1532 is probably from 1965-66 and was part of a UNIVAC 1219 (II) system. The 1532 has a Teletype model 35 on top, with a hood a control panel, and below a tape punch and reader unit below in a drawer. The whole thing is quite rugged. The 1532 configuration would have been installed on a US Naval ship where space was at a premium and rough seas were inevitable. Note the 1 inch 8-bit tape in the back of the drawer. Click for larger image.
VCFed Workshop Dinner at the Princess Diner
Steve,... [ read more ]

HOPE 11

by billdeg - 07/22/2016
Total messages in this thread: 2
Last Post: [ RT 11 v 5.3 needs 32K ] 07/23/2016
Friday night - I have simh installed on my raspberry pi, and I am using my laptop to connect via the serial port, two usb to serial cables and a null modem adapter. works well. root@raspberrypi: CD BIN root@raspberrypi: ./pdp11 sim> SET CPU 11/40 sim> SET CPU 16K etc. To make sure everything was working correctly I set up a PDP 11/05 per this page and loaded BASIC http://iamvirtual...c-11/Basic-11.htm To exist BASIC - use ctrl+E to return to the sim> prompt. Next I attempted RT-11 by following the directions here: http://gunkies....lling_RT-11_5.3_on_SIMH (Noel's site) root@raspberrypi: cd /bin root@raspberrypi: ./pdp11 sim> do inst.ini ... Overwrite last track? [N] y etc. follow directions on Noel's site to set up your PDP 11/23+ environment. Noel finishes with directions to create a run.ini that you can load and bypass the inst... [ read more ]

Installing Core into PDP 11/40

by billdeg - 05/22/2016
Total messages in this thread: 15
Last Post: [ More MAINDEC CQKC-D ] 07/21/2016
32K x 16 Core backplanes installed into my working PDP 11/40. Conversation below explains layout. Click image for larger view.
Email to CCTECH: Background - I have a PDP 11/40 that came to me with a CPU backplane and a general purpose 4 slot peripheral backplane (DD11-C). The CPU backplane came to me connected to the 4 slot via a std 11/40 M981. In the 4-slot I have I have a working 64K solid-state RAM card, M7856 serial card, M9312 bootstrap/console card, and an RL02 drive controller. I can access RAM from the console, run the console program (monitor program) off the M9312 through the serial card. I can't boot yet off the RL02 and I am thinking this is due to a termination issue, not sure yet. I decided I need mor... [ read more ]

Felt-Tarrant Comptometer Model J

by billdeg - 07/07/2016
Total messages in this thread: 1
The Comptometer Model J, manufactured by Felt-Tarrant, Chicago. This unit has a serial number that indicates it was made in 1929. Click for larger view.
Click for larger view.
I picked this up at a local farmers' market for $15, thinking it was an older model. I did some research and found that this was the "J" was sold during the Roaring 20's, so it's not the original Comptometer from the late 19th century. The first units had a wooden case. Oh well, still interesting looking. The woman who sold it to me said they have the missing... [ read more ]

X-Men: Apocalypse: IBM PCs in CIA office

by billdeg - 06/25/2016
Total messages in this thread: 1
Just for the record, when you watch this movie, if you do...the IBM PCs in the CIA office are mine. I rented them to the movie. The scene is supposed to depict the CIA offices as they would have looked in 1983. I am pretty sure they would not have had IBM PCs on every desk back then. They would have had terminals running PROFs, but ... the price was right. You'll see the IBM PCs just as Professor Xavier starts talking to agent Moira MacTaggert. If you don't have the movie, you can briefly see a PC or two in the movie preview. http://cdn2-www.comingso...-MacTaggert.jpg here is the scene, but this clip starts just after the pan through the office where the PCs are visible X-Men: Apocalypse | "Moira’s Office” Clip [HD] | 20th Century FOX https://www.youtube.com/watch?v=pastin69D5c... [ read more ]

Configuring a DL-11 M7800 serial card

by billdeg - 06/14/2016
Total messages in this thread: 4
Last Post: [ Repair Tips ] 06/16/2016
DL-11 M7800 front side jumpers
This DL-11 M7800 serial card was installed in the rear of the PDP 11/40 "industrial11" backplane and was attached to an unknown device by a 1700004-1 flat cable (a.k.a cable with Berg connectors both ends). Click image for larger view.
More photos I don't know what this card was originally connected to, something that communicated at 4800b with 8 data bits. I decided to re-purpose this card and attempt to convert for use with a console terminal at 9600 b 8N1. If I come upon the original device (phone?) I can refer back to the original settings. --------------------------... [ read more ]

Restoring a Lear Siegler ADM-3A

by billdeg - 06/13/2016
Total messages in this thread: 1
Ian Primus clued me in about the potentiometer just behind the yoke of the ADM-3A display CRT. These are used as a secondary control used to adjust the brightness. The tube display is weak and needed more voltage to the tube. Click image for larger view.
Basically this ADM-3A needs some help. I am not sure if this is the same ADM-3 I wrote about in 2008, or if I gave that one to VCFed for their museum. At one time I had three. This is the only ADM-3A I have now, so I decided to bring it to the VCFed Workshop this past weekend, June 12th (13th).
Two problems. First the terminal logic is sending zero's to the vi... [ read more ]

SIMH Emulator - 1956 LGP-30 Computer

by billdeg - 02/09/2015
Total messages in this thread: 5
Last Post: [ Blackjack Disassembly ] 06/10/2016
The 1956 Royal Precision Electronic Computer model LGP-30
The 1956 Royal Precision Electronic Computer model LGP-30
Making heads or tails of the LGP-30 SIMH simulator written for the Royal Precision Electronic Computer model LGP-30 is a worthy challenge for any early 21st Century computer user. Built by the Royal McBee Corporation and first sold in late 1956, this machine is mentioned by sources to be the first personal computer - i.e. the first electronic computer designed for one person to use / operate. The Friden Flexowriter is the I/O device. The Flexowriter is similar to the ASR 33 Teletype in that it included both a typewriter/printer and a papertape storage/reader function. Operational... [ read more ]

PDP 11 9312 ROM Inventory

by billdeg - 06/08/2016
Total messages in this thread: 1
Here is a list of the PDP 11 9312 ROMs I have on hand. I have many duplicates if you see this list and would like to buy a ROM from me, or trade something: 751A9 RL01/RL02 (DL) 752A9 RK06, RK07 (DM) 753A9 RX01 floppy disk, S.DEN (DX) 755A9 RP02/RP03 (DP), Massbus RP04, RP05, RP06, RM02, RM03 (DB) 756A9 RK03, RK05 DECdisk (DK), TU55, TU56 DECtape (DT) 757A9 TU45, TU77, TE16 Massbus tape (MM) 758A9 TS03, TU10, TE10 tape (MT) 759A9 RS03, RS04 (DS) 760A9 ASR33 (TT), PC05 (PP) 761A9 TU60 DECcassette (CT) 764A9 TS04, TS11, TU80 tape (MS) 765A9 TU58 DECtape II (DD) 767A9 MSCP disk, including UDA50, RAxx, RA80 (DU) 811A9 RX02 floppy disk, double density (DY) 616F1 - CONSOLE ROM 248F1 - A0 SG 990A9 - RA80 VAX ONLY 811A9 - RX02 For more info http://ak6dn.dyndns.org/PDP-11/M9312/... [ read more ]
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