Image Map Image Map
Page 1 of 3 123 LastLast
Results 1 to 10 of 24

Thread: Jumper settings for this MFM controller card?

  1. #1

    Default Jumper settings for this MFM controller card?

    I recently acquired an MFM HDD and FDD controller card but I can't seem to find any information for it. I tried to hook it up to my working Seagate ST-225 but the computer was not able to see it. I believe the jumpers need to be reset. Anybody has ever seen or used this card before?

    IMG_4192.jpg
    IMG_4193.jpg
    IMG_4194.jpg
    IMG_4195.jpg

  2. #2
    Join Date
    Sep 2012
    Location
    Indiana, USA
    Posts
    511

    Default

    I'm not sure what that card is. I've never seen one like it, nor can I find any info on it online.

  3. #3

    Default

    I've never seen an MFM controller like that, kinda cool!

    You cannot just "connect" an MFM Hard drive to an 8bit controller card and expect it to work.

    the Hard Drive and the controller card are "married" during the low level format. you cannot take a drive and connect it to a different controller without using that controllers LLF procedure.

    http://https://www.youtube.com/watch...bpd56Xs&t=926s

    This video may be a little dry, but ti really helps explain the concepts.

  4. #4
    Join Date
    Jan 2007
    Location
    Pacific Northwest, USA
    Posts
    33,710
    Blog Entries
    18

    Default

    MSI was an early marketer of Optical (i.e. WORM) storage. This card is probably an interface to an early WORM drive. It doesn't seem to be for ESDI or ST506 interface (no differential drivers or receivers).

  5. #5
    Join Date
    Feb 2011
    Location
    NorthWest England (East Pondia)
    Posts
    2,351
    Blog Entries
    10

    Default

    Quote Originally Posted by Chuck(G) View Post
    MSI was an early marketer of Optical (i.e. WORM) storage. This card is probably an interface to an early WORM drive. It doesn't seem to be for ESDI or ST506 interface (no differential drivers or receivers).
    Do you mean it shouldn't have differential drivers. There are a pair of DS26LS32CN which are differential receivers
    ...
    Dave
    G4UGM

    Looking for Analog Computers, Drum Plotters, and Graphics Terminals

  6. #6
    Join Date
    Feb 2011
    Location
    NorthWest England (East Pondia)
    Posts
    2,351
    Blog Entries
    10

    Default

    Quote Originally Posted by g4ugm View Post
    Do you mean it shouldn't have differential drivers. There are a pair of DS26LS32CN which are differential receivers
    ...
    Sorry I should have checked properly DS26LS31CN which is quad driver, DS26LS32CN quad receiver..
    Dave
    G4UGM

    Looking for Analog Computers, Drum Plotters, and Graphics Terminals

  7. #7

    Default

    Be very careful attaching an unknown interface card that looks like an MFM/RLL controller to a hard disk - it could always be an ESDI controller which uses the same cables, but is electrically a whole different thing.
    It will probably fry the controller and/or the drive. Find out what it is first.

  8. #8

    Default

    Try looking for text strings in the ROM. That could reveal what the card actually is for...

  9. #9
    Join Date
    Jan 2007
    Location
    Pacific Northwest, USA
    Posts
    33,710
    Blog Entries
    18

    Default

    Misread the IC numbers, sorry.

    Plug it in and probe for known I/O port numbers. Could also be ESDI--same 34+20 connector setup.

  10. #10
    Join Date
    Sep 2006
    Location
    Silicon Valley
    Posts
    2,204

    Default

    Highly likely to be ESDI, since there is no MFM or RLL data separator on the card.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •