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Digital Rainbow (PC100-B2)

by billdeg - 04/20/2017
Total messages in this thread: 5
Last Post: [ VENIX Installation ] 04/23/2017
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 ]

Franken Amiga 2000HD

by billdeg - 04/18/2017
Total messages in this thread: 1
0
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 ]

Computer History and Restoration Links

by billdeg - 04/15/2017
Total messages in this thread: 1
The thread date will be updated to indicate the 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 t... [ read more ]

Lear Siegler ADM-3A GraFix Board

by billdeg - 04/14/2017
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 ELite 2

by billdeg - 04/11/2017
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.
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 ]

Tektronix 4015-1 Graphics Terminal

by billdeg - 04/11/2017
Total messages in this thread: 1
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 ]

Dell Dimension XPS 466V

by billdeg - 01/18/2016
Total messages in this thread: 9
Last Post: [ 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...<strong> <a href=[ read more ]

Vintage Computer Festival East 12

by billdeg - 04/07/2017
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 - 02/15/2017
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 ]

Build a bootable RSX11/M on RL02 disk

by billdeg - 02/06/2017
Total messages in this thread: 1
Scan of my cover of the Digital pdp11 RSX-11M Beginner's Guide manual.
RSX-11M Manuals http://wwcm.syn...0Manuals.html This thread describes how one might use simH on a $9.95 Next Thing Co CHIP to make an RL02 image of RSX11/M V 4.0 BL 32 (BASELINE). I got the how-to via web search and clues from CCTECH and simH user group members interested in the project. My case - For my PDP 11/40 I have no working EIS option card. (Otherwise I'd be using UNIX 6.) I already have RT11 running but I wanted to try RSX11. I was told that RSX11/M v.4.0 BL 3.2 is the newest OS version compatible with my system. Distribution media disk images for RSX11/M can be found in RL01 format but not RL02, so I had to first build one RL01 boot disk using 4 RL01s and then port to RL02. [ read more ]

1966-68 Honeywell u-COMP DDP-516 Console

by billdeg - 10/13/2016
Total messages in this thread: 3
Last Post: [ DDP-516 8K core ] 02/03/2017
Photo of a Honeywell u-COMP DDP-516 control console. The orange color scheme was used in the 1966~68 u-COMP models, see early advertisements. Many people know of the "kitchen computer", the 516 is the same thing, same instruction set as the DDP-316 (H316). If the 316 is the Kitchen Computer, the 516 is the "business" model. This console would sit on the operator's desk, or on top of the computer cabinet, which stood about 4 feet tall (need to check that). The operator would use the console buttons and switches as one would use a front panel. There is also a blue cover version of this consol... [ read more ]

KE11-E M7238 EIS Diagnostics

by billdeg - 02/02/2017
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 - 07/20/2015
Total messages in this thread: 14
Last Post: [ 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 - 07/06/2016
Total messages in this thread: 14
Last Post: [ 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 - 01/26/2017
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 ]
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