Image Map Image Map

Search:

Type: Posts; User: diskettenfett

Search: Search took 0.00 seconds.

  1. Replies
    5
    Views
    481

    There's also an original IBM option, confusingly...

    There's also an original IBM option, confusingly called the IBM PS/2 Display Adapter. That's the card to upgrade 8-bit ISA machines (5150, 5160,...) to the "PS/2 video standard" later called VGA,...
  2. Sadly, it is a little more complicated than that....

    Sadly, it is a little more complicated than that. The previous owner of the machine already tried to fix the PSU (which probably had a very simple problem in the beginning), in the process he...
  3. Compaq Portable - Power supply and Floppy controller

    Hello from Germany,

    I have a Compaq Portable Plus in my collection. It has a beyond-repair power supply and a bad floppy/printer board. :(
    Does anybody have those parts or a parts machine and is...
  4. Easy one. Make a boot disk with Norton Disk...

    Easy one. Make a boot disk with Norton Disk Editor (NDE) and Interlnk/Laplink/similar. Norton Disk Editor can save a sector range of a hard disk (or the whole disk) to a file. Simply save that file...
  5. If the problem is temperature dependent, just try...

    If the problem is temperature dependent, just try cooling the suspect ICs one after another with canned air, cold spray or even an ice cube in a plastic bag. That way you should be able to identify...
  6. I remember fiddling with an ST4096 on an 8-bit...

    I remember fiddling with an ST4096 on an 8-bit controller (which didn't support 9 heads) a long time ago, just to test the drive. I think I had to tape off some pin on the drive connector to make it...
  7. Be very careful attaching an unknown interface...

    Be very careful attaching an unknown interface card that looks like an MFM/RLL controller to a hard disk - it could always be an ESDI controller which uses the same cables, but is electrically a...
  8. Replies
    14
    Views
    1,740

    I'm a great fan of the Compaq Portable machines,...

    I'm a great fan of the Compaq Portable machines, especially the Portable II. I was thinking about fitting a faster 286 and swapping the crystal, so I'd be highly interested in your results. I also...
  9. Maybe you could also try to add a HDD or another...

    Maybe you could also try to add a HDD or another boot device introduced just to get it to boot to DOS. Then you could use further tools to diagnose the problem, like Imagedisk, to move the heads, try...
  10. Hm, check the power supply voltages? If I...

    Hm, check the power supply voltages? If I remember correctly, older (like original IBM) floppy controllers needed negative voltages as well. If they are missing (maybe not from the PSU, but missing...
  11. Replies
    44
    Views
    11,183

    Ah, and another thing I just remembered: If you...

    Ah, and another thing I just remembered: If you know the normal sound your machine makes while booting, you could tell whether it was infected with ParityBoot or not. Back then, I had an IBM PS/2...
  12. Replies
    44
    Views
    11,183

    Remember to scan and disinfect all the floppies...

    Remember to scan and disinfect all the floppies you ever inserted into this machine, and other machines you used these floppies in. The Parity Boot virus will stick to you like glue, trust me... I...
  13. Replies
    14
    Views
    1,722

    Actually, there was a PC with a 9" color monitor...

    Actually, there was a PC with a 9" color monitor - the Amstrad PC4386. It was a booksize 386SX machine with a separate tiny Trinitron 9" CRT VGA monitor. Used to have one, sadly gave it away a few...
  14. Replies
    44
    Views
    11,183

    Hi :) I'd bet that you don't have a hardware...

    Hi :)

    I'd bet that you don't have a hardware fault, but instead your PC is haunted by a very common boot sector virus, which will at seemingly random intervals display the message PARITY CHECK in...
  15. Replies
    14
    Views
    1,950

    Don't open the drive! Scrape the cracked part...

    Don't open the drive! Scrape the cracked part down to bare copper and solder short thin magnet wire pieces onto it to repair it. Then apply multiple polyurethane coats or even a thin layer of hot...
  16. Hello, thanks for your helpful comments. I've...

    Hello,

    thanks for your helpful comments. I've been able to narrow down the problem a little further:

    - I remembered that I have a book-size 286 PC in my collection. I opened it up, found a...
  17. Dead IBM 5170 clone - Protected Mode / 8237 troubleshooting

    Hello,

    I recently obtained a clone of a 5170 Rev. 1 (very similar board layout, 2 banks of RAM, although 6/10 MHz). Sadly, it is mostly dead.
    I have so far tested the board with two known-good...
  18. Replies
    3
    Views
    861

    Keyb.com crashes XT Clone

    Hello,

    I have a strange problem with an XT clone I recently received.
    It seems to be an 8088 @ 4,77 MHz, 512 KB RAM, 3,5" MFM harddisk with 20 MB and Hercules Video.

    After I resurrected the...
Results 1 to 18 of 18