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RX01 notes

by billdeg - 08/05/2017
Total messages in this thread: 1
Digital RX01
Digital RX01 dual 8" disk drive uses IBM 3740 FM format disks.
Recently I was given an RX01 drive and RX11 controller card (M7846) and the PDP 8 equivalent (M8357) but no disks. I need to check out the drive, install the card into an available PDP 11 and/or PDP 8 and make disks from images downloaded from the web, starting with RT-11 for the PDP 11. Quick notes to start off this project: 1. Downloaded EK-RX01-MM-002 manual that describes set up. UNIBUS: 2. Page 5-4 "RX11 is not an NPR Device." 3. Page 1-2 "The M7846 plugs into an SPC (small peripheral controller) slot with any PDP-11 processor. " 4. Bootstrap start address is 1000 6. Verify power getting to M7846 correctly here: http://www.chdic... [ read more ]

Capacitor Inventory

by billdeg - 08/01/2017
Total messages in this thread: 1
On-hand Cap Inventory Thread date = last update date Please send inquiries by replying to this thread. mF Voltage Capicitor Type QTY 1500 40 Axial 32 3000 30 Axial 16 27000 30 2-Post 12 500 25 Axial 11 6900 15 Axial 9 100 75 Axial 6 500 75 Axial 6 1100 30 Axial 6 2000 30 Axial 6 21000 15 2-Post 5 850 200 2-Post 4 2600 50 2-Post 4 3400 30 2-Post 4 4700 35 Axial 4 4900 200 2-Post 4 5800 25 2-Post 4 5900 75 2-Post 4 12000 40 2-Post 4 23000 30 2-Post 4 24000 75 2-Post 4 51000 40 2-Post 4 250 150 Axial 3 330 200 Axial 3 470 50 Axial 3 13000 15 2-Post 3 14000 40 2-Post 3 14000 25 2-Post 3 19000 30 2-Post 3 32000 20 2-Post 3 40000 15 2-Post 3 150 150 2-Post 2 200 200 2-Post 2 200 200 3-Post 2 220 200 3-Post 2 500 25 2-Post 2 500 50 Axial 2 800 ... [ read more ]

UNIVAC 1219 USS Midway CV-41

by kingjr5872 - 07/19/2017
Total messages in this thread: 1
John King UNIVAC 1219 USS Midway CV-41
John says: "I have a photo of me repairing one of two 1219 while on-board the USS Midway CV-41. They were a redundant system (configured like a Master/Slave) to land aircraft on a carrier automatically without the pilots control. We used two, in case one computer went down the other would take over. Pretty cool and oh yes many hours/days without sleep repairing an intermittent on these beasts. " Click image for larger view.
John uploaded new docs to the UNIVAC 1219 document library (sort by date). He says: "Attached are two documents that describe how the Univac 1219 computer is used in the carrier landing system. I am still searching for other information about... [ read more ]

Computer History and Restoration Links

by billdeg - 07/02/2017
Total messages in this thread: 1
The thread date indicated last update. Suggest a site here. Bitsavers Software and Document Archive http://bitsaver...ge.com TextFiles.com rTTY Art Repository http://artsc...LLECTION/ Mazjel.com Datastore: Manuals and system docs galore. http://maben.ho...S100/index.html Dave Dunfield's Site - vintage computer newbies should start here, disk archiving info here http://www.classic...org/dunfield Bryan's Old Computers Document Archive http://bytecoll...om/m8_docs.htm Every Computer That Ever Was (list) http://www.crowl...computer_list Samuel S Snyder's 1964 "History of NSA General-Purpose Electronic Digital Computers" http://www.g...DC_1964.pdf Personal Computer Milestones - Fun page that attempts to answer the question: "What was... [ read more ]

Commodore CBM 8096

by billdeg - 06/14/2017
Total messages in this thread: 1
Commodore CBM 8096 PET
The Commodore CBM 8096 is quite rare, an 8032 with a factory-installed 64K RAM expansion. Only the factory-installed 8000's have the special front plate. Click for larger view.
Commodore CBM 8096 PET
Here is a full view of the CBM 8096 running a test program. I recently purchased this computer from a local thrift shop. Click for larger view.
Commodore CBM 8096 PET
The RAM expansion was installed above the... [ read more ]

WiFi232 Modem

by billdeg - 06/01/2017
Total messages in this thread: 2
Last Post: [ AT&T 6300 Takes a Turn ] 06/12/2017
WIFI232 Modem attached to DEC Rainbow Comm Port.
Pictured is a new product called the WIFI232 Modem, by Paul Rickards. The modem is attached to the Comm port of a DEC Rainbow while in terminal mode. Enter AT modem commands to simulate modem communications via telnet. You can "dial up" telnet BBS's with this device by entering the domain after the ATDT command. Click image for larger view.
DEC Rainbow telnet session
DEC Rainbow telnet session is initiated by using AT modem commands to "dial" telnet BBS' such as Area 29, pictured abo... [ read more ]

Soltoff IBM 5150 with AST HotShot/286

by billdeg - 06/11/2017
Total messages in this thread: 1
:"IBM
AST HotShot/286 upgrade board. To install one would remove the 8088 chip from the motherboard and replace with the small controller card with embedded 8088 installed. From this card a cable runs to the HotShot/286 board, with i286 processor. The negative to this arrangement is that the 286 processor is on the ISA bus. Click image to see files.in this set
Many years ago LDOS creator Roy Soltoff gave me an IBM PC model 5150-B. Both hard drives were marginal and eventually went completely dead. Roy's computer contained an AST HotShot/286 card so I thought it was worth backing up his files and putting in a new hard drive. The drives were too far gone, but I was able to use the Seagate ST11R drive contro... [ read more ]

Core Memory

by billdeg - 06/01/2017
Total messages in this thread: 2
Last Post: [ Early 1024 Rectangular Sense Core ] 06/07/2017
Core Memory rectangular enclosure
Hand-threaded rectangular core memory enclosure after cleaning and straightening wirewrap pins. Imagine you're looking at the edges of a set of cores stacked on top of each other within this enclosure. The backplane of wires you see is the "loop around" side of each core plane wire. The outside of the frame. Click image for larger view.
Core Memory rectangular enclosure
This false-color closeup shows how the pins used to hold the wirewrap in place have been bent. Note actual memory magnets are inside... [ read more ]

Commodore WordPro 4 Plus

by billdeg - 06/04/2017
Total messages in this thread: 1
Commodore 8032 PET WordPro 4 Plus Software
The WordPro 4 Plus cover is a lot more interesting than the manual. Click for larger view.
... [ read more ]

Computer Encounters (of the 011rd Kind)

by billdeg - 06/02/2017
Total messages in this thread: 1
Interesting trade show promo pin. Presumably "Computer Encounters" is a reference to the 1977 movie Close Encounters of a Third Kind. I could imagine a sales rep traveling from San Antonio to the 1977-78 Trenton Computer Festival and/or PC '77 (Atlantic City) or '78 (Phila) convention with a small box of these pins. The chip itself appears to have been cut, the die is off center. Click for larger view.
The rear of the hand-cut pin, just two pieces of cardboard and a styrofoam pad in the center to hold the chip. I still need to check to see if... [ read more ]

Quote from ZOSO, CPMUG 21 Archives

by billdeg - 05/30/2017
Total messages in this thread: 1
From CPMUG 21: BITCH, BITCH, BITCH !!! SOME PEOPLE ARE JUST INCAPABLE OF BEING CONTENT. NO SOONER THAN I HAD FINISHED MY REPLY TO ALL OF THE TTY PEOPLE (VOLUME 13.21), TONY INFORMED ME THAT SOME VDM OWNERS HAD TROUBLE READING MY 80 CHARACTER LINES ON THEIR QUAINT I/O DEVICES. I WILL NOT ACCOMODATE YOU, AND HERE'S WHY: I PAID GOOD BUCKS FOR THE TOOLS I USE, AND I CHOOSE TO USE THEM. FRANKLY, I CAN'T FATHOM WHY ANYONE WOULD ADMIT TO OWNING ONE OF THOSE THINGS AT ALL. I'VE SEEN WHAT YOU GUYS ARE UP TO: THOSE HORRID, NARROW LITTLE PROGRAMS WRITTEN IN PROCESSOR TECHNOLOGY'S 5K BASIC (YOU KNOW THE ONES WITH A LINE FOR EVERY SINGLE LITTLE THING - 15 DECWRITER PAGES JUST TO PRINT YOUR VERSION OF WUMPUS [ABOUT WHICH I SHALL BE HEARD FROM LATER]). YOU GUYS HAVE EXPOSED YOURSELVES TO CAT- ARACTS AND MYOPIA BY LOOKING AT YOUR VDM'ED TVS. LEAVE ME OUT OF IT !!! THE COMPANY WHO SUPPLIED... [ read more ]

Digital Rainbow (PC100-B2)

by billdeg - 04/20/2017
Total messages in this thread: 7
Last Post: [ VENIX Install Complete ] 05/27/2017
DEC Rainbow PC100-B2 with VR241
This is the Rainbow PC100-B2 I restored from three systems' parts. I used the VR241 display from the previous dead Rainbow PC100-B2's I had been working on and now I finally have a system that works. Click image for larger view.
DEC Rainbow base model with VR201
This will not do....these VR201's are hard to find without screen rot. Click image for larger view.
I got this message from I Primus who suggested ways to deal with the VR201: "..The cable to the VR201 is very, very simp... [ read more ]

IBM System/3 Diagnostic Module 3348

by billdeg - 05/15/2017
Total messages in this thread: 1
IBM System/3 Diagnostic Module model 5415 with diagnostic programs 825068 and 825032. Please send System/3 to test.
More photos... [ read more ]

Computer Graphics 101

by billdeg - 05/15/2017
Total messages in this thread: 1
Found this taped to the side of a VT-220 terminal. Click for larger view.
... [ read more ]

Altos 5-5AD

by billdeg - 09/27/2005
Total messages in this thread: 9
Last Post: [ More OASIS tips ] 05/10/2017
Died on the table. I can sometimes get it to boot, but the hard drive is now dead. For about three hours I used this system, with Wyse terminal, M/PM OS. Then "click click click..." This unit was rebranded and sold as part of a business system by a company called Sentinel, and they called the system the "Dimension Five" ... [ read more ]
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