1800 HD  (250-3502)           Pinouts                   Faxback Doc. # 1866

NC = Not Connected     GND = Ground      * = Active Low Signal

Parallel Interface:                             Serial Interface:

Pin # Signal Name                               Pin #  Signal Name
         
  1   Strobe*         13  Select                  1    Carrier Detect
  2   Data 0          14  Autofeed*               2    Receive Data
  3   Data 1          15  Printer Error*          3    Transmit Data
  4   Data 2          16  Initialize*             4    Data Terminal Ready
  5   Data 3          17  Select in*              5    Signal Ground
  6   Data 4          18  NC                      6    Data Set Ready
  7   Data 5          19  NC                      7    Request to Send
  8   Data 6          20  NC                      8    Clear to Send
  9   Data 7          21  NC                      9    Ring Indicator
  10  Acknowledge*    22  NC
  11  Busy            23  NC
  12  Paper Empty     24  NC
                      25  GND

FDD Interface:

  1   +5 Vdc          14  Step*
  2   Index*          15  GND
  3   +5 Vdc          16  Write Data*
  4   Drive Select*   17  GND
  5   +5 Vdc          18  Write Gate*
  6   Disk Change*    19  GND
  7   +5 Vdc          20  Track 00*
  8   NC              21  GND
  9   NC              22  Write Protect*
  10  Motor On*       23  GND
  11  Mode Select     24  Read Data*
  12  Direction       25  GND
  13  GND             26  Side Select


(smm 08/06/93)