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  1. Replies
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    Patrick, Wait, let me double check what I have...

    Patrick,
    Wait, let me double check what I have because I didn't put Pin numbers on the DTE side.
    I might have screwed it up.

    I'd try this Null Modem connection first:


    DCE ...
  2. Replies
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    Well, I'm not sure about the negative voltages on...

    Well, I'm not sure about the negative voltages on the RS-232C Pins other than TX.



    DCE DTE
    SYSTEMASTER TATUNG
    RX 2 0 <------------ -12 TX
    TX...
  3. Replies
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    Patrick are you 100% sure that the Teletek has...

    Patrick are you 100% sure that the Teletek has -12 Volts on Pins 5, 6, and 8 with Pin 7 as the GROUND Pin?
    I'm assuming a DB-25 Connector.

    Larry
  4. Replies
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    Patrick, One problem I see immediately is the...

    Patrick,
    One problem I see immediately is the Teletek Serial Port(s) are connected as DCE, not DTE. So, your wiring is
    likely incorrect. You need to use a Volt Meter to see if the Teletek is...
  5. It's more Likely a Shorted Diode in the Full Wave...

    It's more Likely a Shorted Diode in the Full Wave Bridge Rectifier, or the Power Transistor that is
    the Switcher for the Transformer. I've got a few documents that will be helpful. One thing you...
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    Fry's Electronics should have them. They used to...

    Fry's Electronics should have them. They used to carry them, but lately they have been low on stock items.

    Larry
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    Before you do much else get into cassette basic...

    Before you do much else get into cassette basic and just type A thru Z, and see if those characters
    are displayed. It they are OK type enter and then repeat for 0 thru 9. It just checks to see if...
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    The first thing to do is start with Power "OFF". ...

    The first thing to do is start with Power "OFF". Depress and Hold DOWN the BREAK KEY. Turn on
    POWER while continuing to hold BREAK KEY DOWN. When you see cass?? release the break key and
    tap the...
  9. Roger, if you have the goodimage.IMD file and...

    Roger, if you have the goodimage.IMD file and email it to me, I can process it and create the *.SCP image.
    Then use GreaseWeazle to write it to a 3.5" floppy at 300 RPM or 360 RPM. I can send you...
  10. Whatever you do, DO NOT ADJUST any POTS on the...

    Whatever you do, DO NOT ADJUST any POTS on the FDC card. I don't remember if there are any on the
    FDC, but if there are DO NOT ADJUST.

    One quick test you can do is with Power OFF, GENTLY Slide...
  11. Replies
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    Charles, It's likely some of the Kaypro II...

    Charles,
    It's likely some of the Kaypro II Floppy's shed some oxide on the Floppy Heads and that could
    be causing the Floppy error problems. You might want to check the Floppy 's also to see
    if...
  12. If you have a Computer that can run a LiveCD of...

    If you have a Computer that can run a LiveCD of Debian 10.x or 9.x (32 or 64 Bit), you can install
    gddrescue (GNU ddrescue ver 1.21-1 or greater for ver 10.x) and try it's recovery feature.


    ...
  13. I found another copy of the "scp_image_specs.txt"...

    I found another copy of the "scp_image_specs.txt"
    https://github.com/catphish/flex-floppy/blob/master/scp_image_specs.txt


    Larry
  14. Since you have the HxC software installed you...

    Since you have the HxC software installed you could always create a *.IMD file from the .SCP.
    Then the IMDA and IMDU utilities from Dave Dunfield's IMAGEDISK can be used get more
    information on the...
  15. Replies
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    Fritz, I've found that the Samsung SFD-321B...

    Fritz,
    I've found that the Samsung SFD-321B modification information at
    https://majzel.blogspot.com//converting-from-8-to-35-inch-
    has some mis-leading information. To get the SFD-321B into...
  16. New Xerox 820-II Boot Floppy Definitions for cpmtools & libdsk

    After downloading DDBOOT1A.IMD and X820IICPM.IMD, I needed two new defintiions
    for cpmtools and libdsk. IMDA & IMDU gave extra information on DDBOOT1A.IMD

    $IMDA DDBOOT1A.IMD > DDBOOT1A.TXT
    ...
  17. Replies
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    Fritz, The GreaseWeazle...

    Fritz,
    The GreaseWeazle is a stand alone STM32F103C8T6 that uses an adapter Board (either
    a PC type with 34 Pins, or a Amstrad type with 26 Pins for 3" Floppy) to interface with the Floppy Drive....
  18. Replies
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    Fritz, Yes, the B12D2.IMD, B12D3.IMD, and...

    Fritz,
    Yes, the B12D2.IMD, B12D3.IMD, and B12D4.IMD are SS/SD, FM with 26 Sectors, 128 Bytes per Sectors,
    and 77 Tracks. I've got sane directory listings, and extracted several .ASM and .SUB files...
  19. Replies
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    It's likely SD with 26 Sectors, 128 Bytes per...

    It's likely SD with 26 Sectors, 128 Bytes per Sector, 77 Tracks, Single Sided, FM
    (((26 * 128) * 1) * 77) = 256256 Bytes



    0/0 500 kbps SD 26x128
    1 2 3 4 5 6 7 8 9 10 11 12...
  20. exidybox, Yes, it should work fine. Here is the...

    exidybox,
    Yes, it should work fine. Here is the info about the exidy types dsktrans supports:


    LIBDSK - SUPPORTS

    Disk image types supported:

    remote : Remote LibDsk instance...
  21. You are likely to find things like this on...

    You are likely to find things like this on ThingIVerse.


    Larry
  22. Replies
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    hawkeye0914, But, your Updated Diagram still has...

    hawkeye0914,
    But, your Updated Diagram still has one error, and some mis-leading text.

    The Tandy 1400 Pin 10 Motor ON should go to Pin 16 of Drive A (Drive 0) & Pin 16 of Drive B (Drive 1).
    And...
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    Hawkeye0914, I'm thinking that the Floppy...

    Hawkeye0914,
    I'm thinking that the Floppy Signals are really as show here;


    FDC Controller PC-AT Style Controller Based on TEAC FD235HF

    Sig Name Sig Sig. Name Sig Name ...
  24. Replies
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    I would like to know if your Floppy Cable has...

    I would like to know if your Floppy Cable has twisted conductors 10-16 or not?


    Larry
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    hornbetw, I believe you are mistaken, as the...

    hornbetw,
    I believe you are mistaken, as the Model 1 Monitor was actually a RCA Television Chassis with the Tuner
    removed. I found my SAMS 1713 Photofacts for the RCA Chassis KCS203A/D, and have...
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