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Thread: Disk ][: Paying the idiot tax

  1. #1
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    Oct 2016
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    Default Disk ][: Paying the idiot tax

    So, I offset the header on my Drive one Disk ][ while transplanting it and the controller from my 6502 IIe to my 65C02 IIe for cosmetic purposes. It sort of sounded like issue would be isolated to the controller, not the drives themselves, but the drives do the "Ram Track 0 repeatedly" power-up stuff then never actually attempt to read a disk. Any recommended reading for working my way out of the hole i've put myself in, or am I sticking to the UniDisk?
    General Failure Reading Drive C -
    Abort, Retry, Ignore?

  2. #2

  3. #3
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    Ah, perfect. Thanks!
    General Failure Reading Drive C -
    Abort, Retry, Ignore?

  4. #4
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    A true PSA.
    My Retro Computing and Vintage Gaming Blog : http://nerdlypleasures.blogspot.com/

  5. #5
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    Just a little info that may help. I am familiar with the 74ls125 blowing on the disk II but it isnt always the culprit. Recently I looked at two DISK II internal boards I received that never worked; turns out it was the CA3146 IC right next to the aforementioned 74ls125 that was the culprit. I used a known good chip to test and the drive was working again. I ordered some from ALiexpress as replacements: https://www.aliexpress.com/item/4000...e3324c4d2GenIP
    If they work I will post details.

  6. #6
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    Idiot tax: Paid. Thanks to the spares I got with the two needed chips, i'm ready if this ever happens again too.
    General Failure Reading Drive C -
    Abort, Retry, Ignore?

  7. #7
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    So was it the 74ls125? Were they visibly blown?

  8. #8
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    Yup to the former, nope to the latter.
    General Failure Reading Drive C -
    Abort, Retry, Ignore?

  9. #9
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    Mar 2012
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    Augusta, Georgia, USA
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    I think any Apple II owner/collector has done this at least once.

  10. #10
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    Quote Originally Posted by rittwage View Post
    I think any Apple II owner/collector has done this at least once.
    Not having a keyed connector on the floppy card is just a bad idea.

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