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  1. Additional information on the subject card put at...

    Additional information on the subject card put at [here].
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    The maintenance manual...

    The maintenance manual for the 410 series includes a drawing of the 410's 3.5" diskette drive on page 1-9. Does your drive look like that?


    Hard to tell.

    In the connectors, do you see any bent...
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    (Info for others: On the 16KB-64KB type of 5150...

    (Info for others: On the 16KB-64KB type of 5150 motherboard, the subject caps are 2-legged, not 3-legged.)

    It sounds like you are after a close physical match to what is fitted. I have not yet had...
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    Possibly a result of: From a magazine article...

    Possibly a result of:

    From a magazine article on the IBM EGA at [here], "Most programs that run on the Monochrome Adapter should run on the EGA/Monochrome Display combination with no problems....
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    To determine the range of ROM's that would work...

    To determine the range of ROM's that would work with it, a circuit digram would be required, or a pointer to a web page that has the information.


    Please create a separate thread for that,...
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    And perform the same experiment that I did in...

    And perform the same experiment that I did in post #9 ?


    What I use is shown at [here] - two IC hooks (supplied with wire) that I have joined.
    To take a pin low, the second hook is connected to...
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    Yes, but there are other possibilities too. E.g....

    Yes, but there are other possibilities too.
    E.g.
    * 666 simply represents the devilish amount of sugar that goes into pink donuts these days.
    * Maybe the '6' key on his keyboard sometimes sticks a...
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    First, there are no guarantees. Software like the...

    First, there are no guarantees. Software like the Supersoft ROM diagnostics are tools. You end up with possibilities and associated probabilities.

    Was your motherboard working, then one day,...
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    From what I see on eBay, you received both a ROM...

    From what I see on eBay, you received both a ROM and an adapter.

    I was expecting the adapter to be the one advertised at [here], but the one you were supplied with looks slightly different....
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    U36 8255 PARITY DETECTED...

    U36 8255 PARITY DETECTED
    ---------------------------

    The '8255 parity detected' test is described on "Page 20" of the manual for the SuperSoft/Landmark diagnostics. Refer to the diagram [here]....
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    What does Ruud's diagnostic ROM report ? You...

    What does Ruud's diagnostic ROM report ?

    You can get it from [here].
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    Other considerations: * Does the motherboard...

    One can also throw out that original IBM mainboard and can put in one of the rare Pentium II/III or AMD K6-2/3 Baby-AT-mainboards into the 51xx case. That fits well. Then you have up to let's say...
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    Some later motherboards support only one...

    Some later motherboards support only one floppy/diskette drive. And some of those may require the use of an untwisted cable.

    Refer to the motherboard's user manual. If you do not have that, then...
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    Welcome to these forums. Yes, per the...

    Welcome to these forums.


    Yes, per the information at [here], 10 MHz is expected to work.


    If this is a relabeling scenario, I wonder if the chip is even a 287. Imagine someone discovering...
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    Do you see the same symptom when the diskette...

    Do you see the same symptom when the diskette drive is operated within the 410CDT itself (i.e. ejected from its external case, then substituted for the CD-ROM drive) ?
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    I have a 430CDT. The 430CDT will be close in many...

    I have a 430CDT. The 430CDT will be close in many aspects to your 410CDT.

    There is nothing special that I need to operate the external diskette drive. I do not use Toshiba DOS nor the Toshiba...
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    Thanks Brian. I have added the BIN files to the...

    Thanks Brian. I have added the BIN files to the web page at [here].

    Regarding FD_TMC-885_V6.0A_2764.zip
    In the code is "SCSI Disk Drive ROM BIOS V6.01": V6.01 not V6.0A.
    Is your 'V6.0A' because...
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    Adapters exist. A couple of examples are shown at...

    Adapters exist. A couple of examples are shown at [here] and [here]. These were sometimes supplied with early 3.5" drives. On eBay?

    On eBay are PC type floppy cables of varying configurations of...
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    My "Assumption: Motherboard good, and...

    My "Assumption: Motherboard good, and motherboard's video switches set for CGA." in the previous post, raises two other possibilities:


    Motherboard's video switches set incorrectly...
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    Your moderated posts have appeared. And...

    Your moderated posts have appeared.


    And expected as well, would be a single beep from the speaker, at roughly the same time as the LED turns on.

    Revisiting some of possibilities that I listed...
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    You are asking the question of something that...

    You are asking the question of something that needs to be repaired. I can repair these things myself down to component level, and so the cost to me would be about 250 (plus my time). We can provide...
  22. natevw supplied the clock software, and I have...

    natevw supplied the clock software, and I have hosted it at [here].
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    Does the 5155 appear to be starting? So, about a...

    Does the 5155 appear to be starting?
    So, about a minute after power-on, the floppy drive LED is expected to turn on for a little while (as the motherboard's power-on self test checks the drive).
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    The P12 connector (supplies +12V to the display)...

    The P12 connector (supplies +12V to the display) problem that has arisen at least twice, results in the 5155 booting, text seen on the display, but the text is 'jumping up and down slightly'.
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    :-) A Bulgarian factory ?

    :-) A Bulgarian factory ?
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