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Altos 5-5AD

by billdeg
Total messages in this thread: 9
Updated: [ 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 ]

Tektronix 4015-1 Graphics Terminal

by billdeg
Total messages in this thread: 2
Updated: [ Cleaned Up Nicely! ] 05/06/2017
Teltronix 4015-1
Tektronix made some nice programable graphics terminals in the 1970's. I believe I have the correct controller card for this terminal in my DEC industrial/11, but I have to experiment with it. Click image for larger view.
More photos More to come...">... [ read more ]

VCF South-East 2017 Apr 30-May 1 2017

by billdeg
Total messages in this thread: 2
Updated: [ pics look great !! ] 05/04/2017
David Larson and David Greelish smling for the camera at the Vintage Computer Festival South East brought to you by the Atlanta Historical Computing Society (AHCS) and hosted by the Computer History Museum of America, Roswell, GA. Click image for larger view.
A Binary Digital Logic Computer by exhibitor Jim B. Steiner. Click image for larger view.
Retro Japanese Computers — exhibitor Thomas Liebert Click image for large">... [ read more ]

The Commodore 264 Series Video

by billdeg
Total messages in this thread: 1
The Commodore 264 Series - C116, C16 and Plus/4 Computers Video: The video has photos from this site of my C-116's motherboard, (~5:30).
Screen shot from my C-116 (upgraded RAM) running the Tutti Frutti game. Full color.
One other thing; the presenter's said he could not get his C-116 to display in color on his PAL monitor in the UK. The presenter must have had issues with his display or cables. The 116 video is identical to the other TED machines, maybe he had something wrong with his.">... [ read more ]

Franken Amiga 2000HD

by billdeg
Total messages in this thread: 1
Somewhere in there is an Amiga 2000. Click for larger view.
I was hoping to find everything I needed to make a complete stand-alone a2000 system but I did not quite have enough parts and cables on hand. So, I borrowed parts temporarily from other places to test the power supply, motherboard and the required minimum controllers to make this a SCSI "Amiga 2000HD" with 040 processor card (!) system. I put the main chassis, power supply A2000 main controller (whatever you call the controller near the power supply) and a SCSI HD controller as a set, on Ebay. More photos">... [ read more ]

Lear Siegler ADM-3A GraFix Board

by billdeg
Total messages in this thread: 1
Lear Siegler ADM-3A terminal with GraFix add-on board.
You can't tell from the outside, but this is a Lear Siegler ADM-3A terminal with GraFix add-on board installed. It also has a numeric keypad adapter cable that appears to have been cut off. The terminal has the typical screen rot bubbles of an ADM 3. .Click image for larger view.
Note the cables connecting from the main board to the GraFix board installed underneath. Click image for larger view.
... [ read more ]

E.L. Instruments Trainers

by billdeg
Total messages in this thread: 1
E.L. Instruments Elite 2 Circuit Design Test System
The E.L. Instruments Elite 2 Circuit Design Test System. Click image for larger view.
E.L. Instruments Digi Designer DD-1
E.L. Instruments Digi Designer DD-1. Click image for larger view.
More photos A not-quite-a-computer trainer that you often see pop up in auction sites, must have been popular once in schools, etc.">... [ read more ]

Dell Dimension XPS 466V

by billdeg
Total messages in this thread: 9
Updated: [ Replace Dead Motherboard ] 04/09/2017
Dell Dimension XPS 466V
The 1993 Dell Dimension XPS 466V was one of the nicer 486 gaming machines built before the Pentium era. Click for larger view.
This computer needs a real time clock battery (CMOS). Currently one has to run Setup for each cold boot. This system has two Caviar model 2340 341 Mb hard drives. I installed a 1.2Mb 5 1/4" disk drive for utility purposes and I may add a CD ROM in the remaining open slot below the 1.44Mb 3.5 inch disk dive in the middle bay. Dell Dimension 66 mHZ 486 CPU... [ read more ]

Vintage Computer Festival East 12

by billdeg
Total messages in this thread: 1
Bill Degnan Appliance Computers Talk at the Vintage Computer Festival East 12, 2017
I was the Sunday Keynote speaker, my talk was titled, 1977: The year of the appliance computer
Event Photos 1977: The year of the appliance computer (Download PDF) The photos I took do not do justice to the actual exhibits and how they looked in person. First off they were all an amazing amount of work, classy, and great teams. All three mega exhibits were "best" in show as far I am concerned. We were talking about what we'll do next year with teams, never too early to start planning. I'd like to propose we try a vintage networking cluster, "pass the packet" or somethi">... [ read more ]

VCFed Workshop Feb 2017

by billdeg
Total messages in this thread: 1
Commodore PET 2001-8
I spent most of my time working on a sick PET 2001-8. The display board failed. Click for larger view.
Commodore PET 2001-8
Pic of the friend resistor. I replaced this component, but we did not have a TIP29 that I think was the reason the resistor fried. This resistor has been replaced before. Click for larger view.
Mac 400K drive repair... [ read more ]

KE11-E M7238 EIS Diagnostics

by billdeg
Total messages in this thread: 1
industrial/11 with frozen front panel after attempting to load UNIX without a working EIS controller card. The KE11-E Extended Instruction Set (EIS) is required for UNIX 6.
Up to this point I had not messed with using the optional EIS card, M7238, KE11-E in my 11/40 system testing. UNIX 6 requires this card, so I am going to test the card. Not sure if it works. Here is the basic info for the controller: KE11-E M7238 Extended Instruction Set EK-KE11E-OP-001 EK-KE11 E-OP KE11-E/F USER MANUAL EK-KE11E-TM KE11-E/F TECHNICAL MANUAL MP-KE11-B KE11-E MAINTENANCE PRINTS The manual says to cut the W1 jumper on the M7233 Decode card, which I did, as part of installation, plus attach the three ribbon cables between the M7238 and M7232. When I run the system wit">... [ read more ]

Booting the System Using RL02 drive

by billdeg
Total messages in this thread: 14
Updated: [ Progress / Checking Disks ] 02/01/2017
M9312 Bootstrap Terminator CONSOLE Test
I set the jumpers on the M9312 card to use the CONSOLE program. The CONSOLE is a monitor program that allows a person to load a RAM address, change memory, load and run programs rather than have to rely on the front panel. This image shows the echo character program from the manual. The last line reads: @STHIS IS A TEST.... @ is the prompt, S is the start command. I then typed THIS IS A TEST, without a LF CR. Click on image for larger view.
I have one RL01/RL02 ROMS that I can use with the M9213. I read the ROM to compare with the bootstrap listed below to verify I have the correct ones. The RL02 bootstrap is here https://ak6dn.dynd...9/23-751A9.lst Below I">... [ read more ]

Slugging it through XXDP Diagnostics

by billdeg
Total messages in this thread: 14
Updated: [ XXDP+ ] 02/01/2017
DEC PDP 11/40 and RL02 undergoing repairs
PDP 11/40 in chassis with rack arms extended. RL02 sitting on top of rack. Click image for larger view.
Found at lot here, but not ZRLG or ZRLH http://www.retro...evices/RL02.html so, I am going to try the maindec-11-dzrla-a-pb1 and maindec-11-dzrla-a-pb2 - and I see that ak-e038b-mc and ak-e039b-mc I think replaced the first two. * * * * * * UPDATE - found page 2-40 RL01-RL02 user guide to confirm CZRLAAO and CZRLBAO are correct. "..These diagnostics can be run free-standing under the Diagnostic S">... [ read more ]

Commodore Announces 128K Computer

by billdeg
Total messages in this thread: 1
Commodore B(C)128 Product Announcement, Byte Feb 1985
Notice anything wrong with this February 1985 product announcement, in Byte Magazine? Here is your hint. Click image for entire announcement.
The question is, was this a print error or did they really mean to call their new computer the B128? Were the various product departments within Commodore really that disconnected to not know of the real B128, forcing a last-minute name change, to C128? I know the original B128 was developed at about the same time as the C64, and flopped pretty quickly. Protecto bought out the inventory from Commodore and was still actively selling B128's in 1985 and for a number of yea">... [ read more ]

Diagnosing PDP 11 h742a 15V failure

by billdeg
Total messages in this thread: 1
The backplane lost the +/- 15V signal while I was testing the drive controller.
The power supply is hard to get to in the rack. Pictured is the h742a power supply disconnected from the rack but not the computer. I positioned two cinder blocks on each side of the rack with a strong board between them to form a table. Unbolted from the rack I was able to move the h742a 90 degrees to sit it on the board with the power connections intact. Now the unit is much easier to access. Click image for larger view.
I removed the power control board from two h742s including the">... [ read more ]
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