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Booting the System Using RL02 drive |
Slugging it through XXDP Diagnosticsby billdeg Total messages in this thread: 14 Updated: [ XXDP+ ] 02/01/2017  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 ]
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Commodore Announces 128K Computerby billdeg Total messages in this thread: 1  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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Diagnosing PDP 11 h742a 15V failureby 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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simH notesby billdeg Total messages in this thread: 3 Updated: [ CHIP connection to serial terminal ] 01/14/2017  simH RT-11 running on the Pocket CHIP single board computer.
Here is the simh layout I have settled on so I can have all types of emulation in one place.
I have a /BIN for the emulator bin files (altair, pdp11, nova, vax, etc.) created by the MAKE process from the source files. I also created a directory for each emulator to hold system-specific ini and media files.
Assuming you're using a linux for these things, and you're set up the same way...
1. Log in
2. $ cd [../simhdir]/[emulatordir]
where [emulatordir] = name of system such as pdp11
eg. $ cd/simh/PDP11
3. $ ../BIN/pdp11 (the file that the MAKE process created you want to use)
4. At this point you should be at the simh> prompt. sim">... [ read more ]
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Looking for Help with Tandon 602Sby falen5 Total messages in this thread: 2 Updated: [ Tandon 602s 603s SASI ] 01/08/2017 I am a vintage computer collector and recently acquired a strange machine that seems to be hacked together from a machine from Yugoslavia , an apple ii, what i think is tandon 602S 5mb hard drive, with the controller board and an interface to the apple II.A Diy powersupply, 12' onboard monitor and analog board, 5.25' floppy drive. I have made a video log of my findings with this machine. At present I am trying to get the motherboard working. When it is working I will be rebuilding the machine. The tandon drive is the big question as I have no idea about these drives or how to acess it. Here is a link to the first part of this 9 part video log.. so far. https://www.yout...DXmQU&t=1308s Please excuse my 'colorful' irish language. cheers Adrian ">... [ read more ] |
PDP 11/40 Industrial 11 modelby billdeg Total messages in this thread: 3 Updated: [ Front Panel Repairs ] 12/22/2016  Digital made a PDP 11/40 "industrial11" model. The front panel coloring is different but otherwise operates the same as the standard unit.
 Pictured here is a view of the bottom card cage with the main CPU and memory module. Click image for larger view.
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Commodore BASIC test programby billdeg Total messages in this thread: 1 Looking for a nice screen save type graphic for your Commodore 64 and probably many other platforms? 10 PRINT CHR$(205.5+RND (1));:GOTO10">... [ read more ] |
Visual Technology Inc Model 1050by billdeg Total messages in this thread: 15 Updated: [ XEBEC Drive Controller Overheating? ] 12/16/2016  The Visual Technology Inc Model 1050
I have a perfectly working Visual Technology 1050 system with Winchester hard drive option. There is however one problem. I have three keyboards and they're all bad. The problem is similar to that of the Processor Technologies SOL Terminal Computer and other keyboards made with a foam contact pad in each key. About 25% of the pads have turned to dust. To format the Winchester drive I was forced to swap keyboards just to get certain keys to print on the screen. I needed all three keyboards to initiate the hard drive format! There has to be an easier way.
 The Visual Technology Inc Model 1050 keyboard.
">... [ read more ]
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Atari 1200XL (1983)by billdeg Total messages in this thread: 1  The 1983 Atari 1200XL computer, with Pitfall! cart in use. Click image for larger view.
 Here is a closeup of the Pitfall! screen. It looks more or less the same as the Atari 400 and 800 systems' display of the same cart. In fact my testing shows that one could use any 400/800 cart in the 1200XL. Click image for larger view.
 Close up view of the Atari 1200XL. Click image for larger view.
I got this compute">... [ read more ]
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Televideo PM/286by billdeg Total messages in this thread: 4 Updated: [ Set up Process ] 12/12/2016  The Televideo PM/286 Computer with 8 user ports. The PM/286 is a near IBM AT clone with notable features such as a 286 processor with external switch to change from 8 mhz to 6 mhz (should you be feeling a bit slow that day) and cassette port for backup storage.
This model has a high resolution color CGA card, a Novell controller and a 8-port user controller.
I have a complete batch of the system software, and I would like next to return this system to original condition. The manuals make it clear that this is an MS DOS based system. I put the computer in the same class as the ear">... [ read more ]
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IBM System/360 Model 44 Pamphletby billdeg Total messages in this thread: 1  Pictured is the cover of the IBM System/360 model 44 pamphlet brochure from 1968/69. The System/360 model 44 was oriented specifically toward scientific applications, but otherwise its code and instruction set was compatible with the /30 through /75 models. Click image to download PDF. ">... [ read more ]
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UNIVAC Proposal to Philip Morris 11-1968by billdeg Total messages in this thread: 1  Model calling for backups. UNIVAC 9300 system. Click image for larger view
 UNIVAC 9200 brochure cover. Sperry Rand liked their UNIVAC product models making phone calls. Or maybe they're calling product support. Or maybe Sperry Rand hires its product models to also work in their customer support department. Click image for larger view
I picked these images from the brochures included with the following proposal to Philip Morris dated November 1, 1968. I really love the pretty, hot, psychedelic photos of women and their UNIVAC 9000">... [ read more ] |
Computer Products Co. Card Inventoryby billdeg Total messages in this thread: 2 Updated: [ Request for Pictures ] 11/02/2016 Thread date is last update date. MAKE OFFER(S) Computer Products / CP A Fort Lauderdale Firm that makes controller cards for engineering purposes. These cards may have been used in a DEC A/D system in the 80's. PART NUM / DESCRIPTION / (QTY) 021-177 LL GATE CARD (2) 021-058 OPTICALLY ISOLATED INPUT 006-019-0 A/D CONVERTER 021-161 4 CHAN RGTR D/A CONV (2) 021-0027 DIGITAL OUTPUT 021-0176 021-5229 021-0032 021-0205 RELAY BOARD 021-5232 RELAY BOARD 021-5389-0008 PANEL SWITCH BD 021-5235 PANEL LIGHTS 021-100 PANEL LIGHTS 021-0016 021-0004 TERMINATOR? 021-099 DIGITAL INPUT TEST --- EXTENDER PD --- CONSOLE RIBBON CABLE CONNECTOR ">... [ read more ] |
Photos from this site on NeXTstationby billdeg Total messages in this thread: 1  NeXTstation color desktop networked via TCP/IP, running Omniweb2 browser, open to vintagecomputer.net and displaying Honeywell DDP-516 photo. Click image for larger view.
 NeXTstation color desktop networked via TCP/IP, running Omniweb2 browser, open to vintagecomputer.net. I used website search to locate a photo of the NeXTstation boot screen. What you se">... [ read more ]
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Updated: [ Progress / Checking Disks ] 02/01/2017