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Thread: Compaq SLT/286 Floppy Connector Pinout

  1. Default Compaq SLT/286 Floppy Connector Pinout

    As the title mentions, does have the pinout for the floppy connector? It's non-standard and even different than other 26-pin 3.5" floppy pinouts I've found elsewhere.

    Pins 1,3,5,7,9,11,13,15 are all ground, and pin 18 and 21 are Vcc (5Vdc). Other 26-pin floppy drives have 1,3,5 Vcc (5Vdc).

    Citizen OSDA 53B - discontinued ages ago no info found thus far on any Internet archives

    what a couple of us have determined (may be in error) is as follows:

    01=GND					02=/STEP
    03=GND					04=/WDATA
    05=GND					06=/WGATE
    07=GND					08=/TRK0
    09=GND(no pin)				10=/WPROT
    11=GND					12=/RDATA
    13=GND					14=/HDSEL
    15=GND					16=/DSKCHG
    17=/RPM_LC-H/L				18=VCC (5Vdc)
    21=VCC (5Vdc)				22=/DIR
    23=???					24=/DRV1 ??? 
    25=???					26=/MED1 ???
    Drive connector 23-26 connect to a Fujitsu Compaq date code 9014 part number 114390-001 (I think it's a gate array 4x30 pins) QFP chip's pins 13, 2, 3 and 13 respectively.

    Thanks for any assistance,

  2. #2
    Join Date
    May 2011
    San Antonio, TX


    Is it different even compared to the connector found in the large black T-#### series of Toshiba portable computers?


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