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  1. Replies
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    from a quick google check I assume 2732 eprom is...

    from a quick google check I assume 2732 eprom is a 4kb rom ?

    901229-05 is 8kb rom chip. You will need at least 8kb eprom. 2764 eprom should do fine.

    Check this out for suitable socket...
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    I recently made EEPROM and tested that it does...

    I recently made EEPROM and tested that it does work. Also EPROM works,
    but of course you need programmer and socket adapter.

    Did you have another drive to test your ROM chip there ?
  3. Replies
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    Thanks Dave for your encouragement ! Next in...

    Thanks Dave for your encouragement !

    Next in line is this brown case 1541 drive.
    The patient suffers from unbootability with red eye symptom and endlessly running spindle :).

    First glance at...
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    Thanks WBST for the hard drive deal, it finally...

    Thanks WBST for the hard drive deal, it finally arrived today !

    Heh, quicker shipment took about three weeks, I wonder how long the slower would have taken =).
    I think most delay is caused by...
  5. Replies
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    It can be a wide range of things. How did you...

    It can be a wide range of things.
    How did you test those chips ? On another working drive ?
    I assume, they were socketed. Sockets can be oxidized. Even if chips are ok, bad contacts
    to sockets...
  6. Deep apologies for continuing off topic......

    Deep apologies for continuing off topic... (well, at least it can be considered vingate)

    But I confess to being a ford guy.
    Maybe one day it will be street leagal again.

    59126
  7. Replies
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    the PCB in my previous post / drive was indeed...

    the PCB in my previous post / drive was indeed good after bridge repair and I had rescured another
    drive back to life.

    Since then, I have received new treasures, the set of six 'new' failed...
  8. Thread: Ibm xt 5160

    by VintageVic
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    903

    Thanks to everyone for your comments! Ok, so,...

    Thanks to everyone for your comments!

    Ok, so, I'm out of luck trying to use 1.2Mb floppy drive with ibm original floppy card.

    But it happens, I have this Goldstar Prime 2 I/O card:

    58995...
  9. Thread: Ibm xt 5160

    by VintageVic
    Replies
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    903

    Decided to add 3.5 inch floppy to my IBM XT, even...

    Decided to add 3.5 inch floppy to my IBM XT, even though the original floppy adapter
    (and I guess bios and the driver) is only able to handle 720kb dd discs.

    Waited for weeks for the 37pin male...
  10. Replies
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    I moved on to the failed drive on my previous...

    I moved on to the failed drive on my previous set. Let's call it drive #5.

    Symptoms: Drive seems to boot otherwise fine, but spindle is not spinning. Red led comes
    on and goes off. Mechanisc...
  11. Replies
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    Perhaps you should at least measure voltages from...

    Perhaps you should at least measure voltages from the VIC power supply, before
    ordering the VIC only. If the psu is the cause, you won't help yourself ordering only the computer.
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    Next level cat repellent

    This guys videos made me laugh mouth wide open:

    https://www.youtube.com/watch?v=goZ2DqMnaGc
    https://www.youtube.com/watch?v=OMOY9lnjZVA
  13. I have nothing very rare. Following items are...

    I have nothing very rare. Following items are nothing special
    for their model or serial numbers either. I cannot put these in
    correct order, but I'm curious about their production numbers.
    VIC-20...
  14. Replies
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    Welcome DarkAllan, I'm new here also. What...

    Welcome DarkAllan,

    I'm new here also. What sort of vintage computing have you been exposed to ?
  15. Replies
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    Thank you Larry, for the links. Pictorial guide...

    Thank you Larry, for the links. Pictorial guide was new to me. Useful in some cases
    to get reference, although as the page says, it is not 100% exact as many failures can
    cause similar symptoms.
    ...
  16. Real bargain on the equipment itself! It's a sad...

    Real bargain on the equipment itself!
    It's a sad thing how much shipping costs.

    For me, being EU citizen, I would have to add 24% VAT to orders outside
    EU and then +10% for toll to the previous...
  17. Very nice, I'd be excited too :). What is...

    Very nice, I'd be excited too :).

    What is that pc ? Are you willing to share the blow your wallet took for this one ?
  18. Replies
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    UB4 ROM (901229-03 or 901229-05) failure is...

    UB4 ROM (901229-03 or 901229-05) failure is pretty common on 1541 drives.
    Replacements have often been made to EPROM chips, but I found that EEPROM
    works better for me. No need for UV lights for...
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    I have found the exact same issue with Mitsumi...

    I have found the exact same issue with Mitsumi mechanics drives. And yes, I only buy
    alps drives. Mitsumi drives would be good as spares for the case and pcb, but sellers
    don't make difference,...
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    Thank you Idkraemer! I will note that on my...

    Thank you Idkraemer! I will note that on my service from now on.

    Tonight has been spent on other duties besides Commodores, but I did
    have a chance to put new tantalum cap on the drive mentioned...
  21. Replies
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    Fixing Commodore 1541 drives

    Heh,

    sometimes I wonder if I'm out of my mind. I ordered six failed commodore 1541 drives
    yesterday from ebay from one seller. And that's not all, from previous six I ordered, half
    are still...
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    have you tried to remove hard drive controller...

    have you tried to remove hard drive controller and boot with floppy only ?
    does it still behave the same ?

    edit:
    ah yes, in your first post you say that you just did that.
  23. Replies
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    yes, that is the way. put one chip from bank...

    yes, that is the way.

    put one chip from bank 1 -> to bank 0.
    Boot, and see, if you still have 256k. If yes, that chip was ok.
    If the chip is faulty, you might have 0k good ram left. Then you...
  24. Replies
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    have you ruled out issues with power supply? Is...

    have you ruled out issues with power supply?
    Is the hard drive spinning - maybe it will give a hint ?

    Did you try the burned bios eepproms on another motherboard just to make sure they are ok?
  25. No one seems to remember "Spider". Well, like...

    No one seems to remember "Spider". Well, like said, the name of the game might have been
    something else too.

    The search for original "Spider" is challenging, so in the mean time, I have tried to...
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