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Thread: 286 MB wants 1.22/720/1.44 FD as Boot drive

  1. #11
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    You certainly can do this. Just do a sector-for-sector image copy. ImageDisk will do this, as will Linux dd, and a handful of DOS programs, such as CopyQM. DOS will see it as a 360K disk.

  2. #12

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    Quote Originally Posted by Chuck(G) View Post
    Linux dd
    With dd, it sometimes works, sometimes doesn't.
    360KB -> 720KB works fine, tracks 0..39 go to 0..39, everything's OK.
    But eg. 360KB -> 1.44MB can't work, as tracks 0..39 go to 0..19

  3. #13
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    I think I may have figured it out. I have a lot of TEAC FD-55's. But several variations of this model. None of them have the jumpers set the same.
    I thought this was a 360K drive. I am wrong. It is a 1.2 drive that should be able to read 360K disks.
    Each version has the jumpers in different places on the PCB
    I looked at the manual for setting them for 5170/AT but could not quiet figure it out. I don't yet have all the vocabulary down to fully understand more then D0-D3.
    They are all set for D1. But the jummpers UI,OI,FG,I, etc are all set differently, even on the same model.
    I have
    FD-55BR-506-U
    FD-55GFR-142-U
    FD-55GFR-570-U (My reading suggests this is the best version. Y/N?)
    What is the correct jumpers for each model for AT, and Win 95/98.
    Thanks again for everyone support!!
    Atari Falcon030, Atari MSTE, Atari PS3000, STACY 4, 4160STE-CosmosEX, Atari PC1, 400/800/1200XL,800XL,800XE,130XE, XEGS, Apple IIGS, TRS-80 4P, TI 99/4A, Co-Co 3, Amiga 500, C64/128D

  4. #14

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    Quote Originally Posted by KLund1 View Post
    I have
    FD-55BR-506-U
    FD-55GFR-142-U
    FD-55GFR-570-U
    You need to sort out your apples and oranges first.

    FD-55BR is a 360K DD drive.

    FD-55GFR is a 1.2M HD drive.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  5. #15
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    I've posted on Teac's numbering scheme before, but here it is in brief:

    A = SS 48 tpi (180K)
    B = DS 48 tpi (360K)
    E = SS 96 tpi (360K)
    F = DS 96 tpi (720K)
    G = DS HD (1.2M)
    H = DS HD (1.44M)

    55, 54, 105 = 5.25"
    05. 35, 235 = 3.5"

    So an FD235GF is a 3.5" drive that can do both 720K and 1.23M (360 RPM)
    while an FD235HF is a 3.5" drive that can do 720K and 1.44M (300 RPM)
    An FD55B is a DS 48 tpi 5.25" drive (360K)
    while an FD55GF is a 96 tpi drive that can do 720K and 1.2M.
    An FD55F is a 96 tpi drive that can do 720K only.

    Other letters, such as "R" relate to various features, such as latch on the right hand side of the faceplate.

    It's all very methodical.

  6. #16
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    Thanks, that must be it.
    I must have got the BR mixed up with the GFR's.
    But what about the jumpers all being mixed up. Anyone got a line to get them all working for a AT or WIN98 machine?
    The BR works, but it'e jumper are nothing like the GFR's
    Atari Falcon030, Atari MSTE, Atari PS3000, STACY 4, 4160STE-CosmosEX, Atari PC1, 400/800/1200XL,800XL,800XE,130XE, XEGS, Apple IIGS, TRS-80 4P, TI 99/4A, Co-Co 3, Amiga 500, C64/128D

  7. #17
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    Fortunately, Teac floppy jumper references are all over the web. Here's one for the 55GFR

  8. #18
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    Got it. worked through it and got it working!!
    Thanks everyone!! I always get great advice and help here!!
    Appreciate it all very much!
    Atari Falcon030, Atari MSTE, Atari PS3000, STACY 4, 4160STE-CosmosEX, Atari PC1, 400/800/1200XL,800XL,800XE,130XE, XEGS, Apple IIGS, TRS-80 4P, TI 99/4A, Co-Co 3, Amiga 500, C64/128D

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