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1976 Digital PDP-8/A Minicomputerby billdeg Total messages in this thread: 1  Partially Assembled. Click image for larger view.
This system came nearly complete, but was missing the cable that connects the power console to the backplane. I got one from the parts bin. I also had to move one of the molex connectors from the main transformer to a different location on the power backplane. Some of the cards were in the wrong slots. I wonder if this is why whomever had the computer originally gave up on it.
 A edge-on view of the controller cards installed. The original module assignment sheet on the back">... [ read more ]
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1982 Digital VT180 Z-80 CP/M Computerby billdeg Total messages in this thread: 1  VT180 "Robin" personal computer with Z-80 Processor. A dual 5 1/4" disk drive sits on top. Click image for larger view.
 Here is a view of the directory screen after booting CP/M from the RX 180 AB dual 5 1/4" disk drive. Click image for larger view.
I am impressed by the sharp grey text on white background screen. This was DEC's first "personal computer", technically a VT100 with the Personal CP/M Computing Option Kit installed. The kit provides a Zilog Z-80 CPU, disk drive and extra serial port to the VT100. There may be some sort of graphic upgrade (?)
This particular machine was donated to Kennett Classic and will be">... [ read more ]
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Honeywell / DDP-516 simH experimentsby billdeg Total messages in this thread: 1 This thread describes use of the Honeywell H316/516 simH scripts found here Start by downloading simH scripts. The CMD files should be opened in a text editor...stand by...">... [ read more ] |
Recovering 1969 Honeywell Paper tapesby billdeg Total messages in this thread: 3 Updated: [ Tapes Read - It's LUNAR LANDER ] 08/06/2022  Mysterious papertape with hand-printed text that reads "Start 1000 tty RUN -> 90" Click image for larger view.
This thread details the technical aspects of the data recovery itself, if you want to learn the background story, visit https://www.kennettclass...m-lunar-mission/
The short story is we received an ASCII papterape proported to have had been created containing a "data dump" from the 1969 American Apollo lunar landing. Teh tape was generated using a Honeywell DDP-516 minicomputer located at a NASA facility in White Sands, New Mexico. Apparently an operator made a personal backup of the lunar landing data (?)
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Computer Terminal Corp DataPoint 3300by billdeg Total messages in this thread: 4 Updated: [ Restoration Completed. ] 11/13/2022  The Computer Terminal Corp. DataPoint 3300 after cosmetic restoration work completed. This is the first glass terminal first produced by CTC in 1969 (after being announced in 1967). The 3300 was a play on the ASR 33, which is what this machine was designed to replace. The serial number sticker says 1030. Click image for larger view.
 System after cleaning. The terminal was in pretty bad shape (evidence of rodents on the keyboard), but fortunately there was no rodent nests inside. First, the cover was removed and">... [ read more ]
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Kaypro IIby billdeg Total messages in this thread: 3 Updated: [ Replace Power supply ] 07/09/2022  As soon as I saw this raised socket I knew this was not a stock Kaypro II, but other than raising the Z80-PIO chip what else is different? Click image for larger view.
This Kaypro II was donated to Kennett Classic and does not boot, disk drive is not detected. Should be fixable.
James Palic, the original owner of this portable computer writes:
"...Online Consulting is the name of the company that I and my partner started nearly 40 years ago after we left Dupont. Initially we sold Kaypro and other computer hardware. Someone showed us how to modify the boot ROM to have our company name show when booting.
Online Consulting is still around but we're now known by our DBA - ONLC Training Centers.
That particular Kaypro is a ve">... [ read more ]
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1983 Eagle Spirit XLby billdeg Total messages in this thread: 1  The Eagle Spirit XL was an early IBM/MS DOS-compatible portable intorduced in October 1983. Click for larger view.
Keyboard with LET status lights, 320K floppy and 10Mb hard drive.
32.5 pounds, monochrome screen. i8088 CPU.
Needs work..will post updates as progress made. More pics
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PC Professional Users Group of Delawareby billdeg Total messages in this thread: 2 Updated: [ William Bleakney, Founder found ] 06/20/2022 Anyone a former member of this group based out if Wilmington, Delaware? They put out about 50 diskettes in the mid-80's for IBM format PCs. Lots of interesting programs and utilities. I have about a quarter of the disks, looking to complete the set. Enter Archive">... [ read more ] |
Atari 400 With 32/48K RAM Expansionby billdeg Total messages in this thread: 1  Atari 400 homebrew RAM expansion front. Click image for larger view.
Unlike modern RAM upgrades, this one is an actual vintage wire-wrapped 48K upgrade constructed in 1981 or so.
 Atari 400 homebrew RAM expansion obverse. Note the wirewrap connections and pin 4 has been cut. Click image for larger view.
 The wire jumpers added to the motherboard to allo">... [ read more ]
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1976 DATAC 1000 6502 Training Computerby billdeg Total messages in this thread: 1  The DATAC 1000 was designed by Philadelphia Area Computing Society (PACS) members Carmen DiCamillo and Roland James in 1976. In its original form the DATAC 1000 was a single board 6502 microcomputer trainer that included a training course for beginning computer engineering students to use to learn about 6502 microprocessor systems design. Click image for larger view.
It is likely the DATAC 1000 was demoed by PACS at the PC'76 personal computing consumer trade fair in Atlantic City, NJ, alongside the Apple, MITS, Processor Technologies and other pioneering vendors of the time (AUG 28-29 1976). PACS would also host instruction sessions internally that featured the DATAC 1000 and at least one local college (Drexel University) used them, possibly other schools as">... [ read more ]
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Heathkit Tube Checker Model TC-3by billdeg Total messages in this thread: 1 [image pending] circ. 1958-1961 1. Use the rolling tube testing settings chart 2. Set all of the levers to the center position 2.5 Move the SET LINE dial clockwise to turn on the unit and stop when the needle points to 50. Switch the short/leakage switch to short 3. Set the Type, Filament, Plate dials to match the tube type. Note that many tubes have two test combinations 4. Move paddles in the Top column up, the Bottom column down and leave the others in the middle 5. insert the tube in the appropriate tube holder 6. Let the tube warm up. 7. Press down the short adjust line lever to the test position. Does the needle display move into the GOOD area? If so the tube is good. If the short light comes on or the needle points to the BAD side, the tube is bad. 8. Move the short/leakage switch into the leakage position and repeat the test. 9. If the tube">... [ read more ] |
Bigger Apple II PEEK, POKE and CALL Listby billdeg Total messages in this thread: 1 For my own reference and maybe yours... https://apple2...---------------- APPLE CALL, PEEK, POKE LIST CALL 144 SCAN THE INPUT BUFFER CALL 151 ENTER THE MONITOR NORM APPLE CALL, PEEK, POKE LIST ------------------------------------------------------------------------------ CALL -144 SCAN THE INPUT BUFFER CALL -151 ENTER THE MONITOR NORMALLY CALL -155 ENTER THE MONITOR & SOUND BELL CALL -167 ENTER MONITOR AND RESET CALL -198 RING BELL (SIMULATE CONTROL G) CALL -211 PRINT "ERR" AND RING BELL CALL -259 READ FROM TAPE CALL -310 WRITE TO TAPE CALL -321 DISPLAYS A, S, Y, P, & S REGISTERS CALL -380 SET NORMAL VIDEO MODE CALL -384 SET INVERSE VIDEO MODE CALL -415 DISASSEMBLE 20 INST">... [ read more ] |
DEC VX40 Multiaby billdeg Total messages in this thread: 3 Updated: [ Better Login ] 01/21/2022  This tiny (~10 inches wide) DEC VX40 Multia stared out as a VX40B and was field upgraded to a VX40L-F2 . Click image to see files
 Boots up like a typical Alpha from the mid 90's. This system has VMUNIX installed but I have not yet cracked it to get access. Click image to see larger view.
See boot screen succession snapshots.
If you the reader have experience with this hardware or have any comments please contact me. More to come.">... [ read more ]
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1979 HAL DS-2000 KSRby billdeg Total messages in this thread: 1  The HAL Communications Corp HAL DS2000 KSR smart terminal. Click on image for larger view.
 The manual refers to this BMC monitor, so I assume it was purchased along with the KSR unit. Click on image for larger view.
 Here is a nice big pic of the boards and wiring view, with the case open. Click on image for larger view.
More pics
What's next? Attach it to a computer expecting a current loop as if the HAL were a Teletype. There is also Morse code and Baudout communications.">... [ read more ]
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