• Please review our updated Terms and Rules here

Search results

  1. O

    Maintenance Documentation Service

    I ordered a part for my PDP-11 and the seller included two sets of CDs titled: "Maintenance Documentation Service on CD-ROM". The only issue is that the CD-ROM sets are formatted for openVMS and the search program included is for openVMS. Windows nor Linux (Ubuntu) recognize the disks. I did...
  2. O

    PDP-11/44 Restoration (part 2)

    After having put this project on a long hiatus I have finally decided to try and finish up my PDP-11/44 restoration. So a quick recap of what was being done: The system would initially not turn on. A capacitor was replaced on the Bias and Interface board, and then the system would power on...
  3. O

    Apple II plus issue

    I recently acquired an Apple II plus with a few cards. When I proceeded to power it up, the display was all ?'s and it kept beeping. The pattern of beeping was the typical start up beep, then several beeps very close together (it almost sounded like a continuous tone), and then it would...
  4. O

    Heathkit Octoport Troubleshooting

    I recently purchased a piece of equipment called Heathkit Octoport. It is serial switch box that is software controlled and configurable. You send commands to it to link a serial port to another serial port, or link to one of the two parallel ports for printing. When I purchased it, the...
  5. O

    Qualstar 9 Track Tape Drive Take Up Reel

    I was using my tape drive today, and I stepped away for a moment. When I came back the tape had somehow come off of the transport, and a portion of it had wrapped itself around the spindle of the take-up reel. After removing the tape, the rubber ring around the take-up reel had come loose, and...
  6. O

    PC-Bubble Bubble Memory ISA Card

    I have recently obtained an Intel iPCB-76 PC-Bubble card. From the documents I have received with the card it appears to be the same as an iPCB-75 but with a BIOS extension for it to act as a fixed disk. After double checking the settings specified in the manual and the errata pages that came...
  7. O

    VIC-20 Issues

    I recently obtained a VIC-20, and I have found that the 2 key does not function at all, and that the 4 key displays the $ when pressed without the shift key. Also it will display 4 when the Commodore key is pressed with it. It also displays other characters at times. All the other keys work...
  8. O

    ALPS P200G Printer Error

    I have an ALPS P2000G dot matrix printer. When I turn it on it the error light flashes continuously and the internal speaker beeps 5 times. When I remove the interface cartridge there are no errors. Searching for this printer model online only produces links to stuff for sale for other ALPS...
  9. O

    DEC Rainbow HDD problem

    I recently acquired a DEC Rainbow computer, and it worked perfectly, including the hard drive. Today the computer froze, and I had to turn it off (the setup screen wouldn't even show up to do a reset). I did receive error message 16 Interrupts off, and another message regarding the main board...
  10. O

    Molecular Computers board

    A while back I started a thread (http://www.vintage-computer.com/vcforum/showthread.php?32921-Single-Board-Computers&highlight=single+board+computer) regarding a couple of single board computers. One of them has a brand name of Molecular computers, but I could find no information about it at...
  11. O

    Acoustic Coupler Help

    I recently acquired an acoustic coupler, and I am wondering how to use it properly. I can get it to generate the carrier if I whistle into it. I tried that when I connected it to the terminal and when I pressed buttons it changed the modulation. I press a button labeled AC DAA, and it stops...
  12. O

    Monitor cable for the HP 9836

    Does anybody know what the connections for the monitor cable for the HP 9836 (aka: 200 Series Model 36, 9000 Model 236, and 9000/236) are? I found a reference at one time that said the cable was straight through, but I cannot find it any more and I wanted to make sure that there are no...
  13. O

    Dauphin 900N laptop BIOS error codes

    Hello everybody. I have a Dauphin 900N laptop (above the keyboard it says 930, but on the outside it says 900N). At one point it powered up and functioned fine. I took it apart to change the CMOS battery and remove corrosion from the battery pack. There was also something floating around in...
  14. O

    Kaypro 10 bad sector on HDD

    I booted up my Kaypro 10 to run the bad sector locator program, Findbad. Upon running it displays Bad Sector Lockout Program 5.4 Universal version Then it procedes to check the disk Today it found a bad sector. I ran it a second time, but it did not find it again. I assume that it marked...
  15. O

    Netronics Elf II repair

    I recently acquired a Netronics Elf II in non-working condition. Due to a lot of poor solder joints I have started to remove each piece and clean the rosin from the traces and components. I am almost to the point where I will start working with the IC chips. Should I just leave the chips...
  16. O

    New Sanyo MBC-550

    Hey guys, I just got a new Sanyo MBC-550 today. It works great, and is in almost perfect condition. It even came in its original box with styrofoam. The original owner kept it in great shape and kept pretty much all of the documentation that it could have. It even had a good number of Soft...
  17. O

    VT101 receive problems

    I have recently tested my VT101 terminal with a loopback connector. It fails RS-232 loopback test, but it passes the 20mA current loopback test. After testing it a second time with the RS-232 test, the character that represents gibberish received appeared on the screen as I was typing the...
  18. O

    Single Board Computers

    I just acquired two SBC's. One of them is called The Bigger Board SBC-2001 Z80A manufactured by Business Information Systems. I have the manual with it, and it implies that a CP/M customized for it came with it. Can I modify CP/M myself? I also have another SBC that does not have a name from...
  19. O

    Greetings

    Hello, after browsing the forum for a while I have decided to join. I have no specialties when it comes to collecting vintage computers; my collection consists of some early to mid 80's systems and a PDP-11/44 along with a few artifacts such as disks and books. The main thing that I like about...
  20. O

    PDP-11/44 Restoration

    I have a non-functional PDP-11/44 that does not power up (only the relay in the power strip in the cabinet activates). Upon closer inspection of the system I have found that a component (possibly the large capacitors) in the PSU (H7140) makes a high pitched whine after the power has been...
Top