SCIENTIFIC MICRO SYSTEMS

OMTI 8600, 8610

  Data bus:                  16-bit, ISA

  Size:                      Full-length, full-height card

  Hard drives supported:     Two MFM ST506/ST412 drives or ESDI drives

  Floppy drives supported:   Two 360KB, 720KB, 1.2MB, or 1.44MB drives

[Image]

                              CONNECTIONS

                    Function                           Location

  34-pin control cable connector - hard drive             J2

  20-pin data cable connector - drive 0                   J3

  20-pin data cable connector - drive 1                   J4

  34-pin control cable connector - floppy drive           J7

  2-pin connector - drive active LED                      J12

                       DRIVE TYPE CONFIGURATION

  Cylinders     Heads       W1          W2         W3         W4

    ESDI        ESDI      closed      closed     closed     closed

     918         15        open       closed     closed     closed

     987          7       closed       open      closed     closed

     697          5        open        open      closed     closed

     306          4       closed      closed      open      closed

     977          5        open       closed      open      closed

     733          5       closed       open       open      closed

     640          6        open        open       open      closed

     640          4       closed      closed     closed      open

     512          8        open       closed     closed      open

     612          2       closed       open      closed      open

     612          7        open        open      closed      open

     615          4       closed      closed      open       open

     612          4        open       closed      open       open

     306          6       closed       open       open       open

     306          4        open        open       open       open

                          HARD DRIVE PORT ADDRESS

       Address              W5                W6                W22

  »       320h             open              open             closed

          324h            closed             open             closed

          328h             open             closed            closed

          32Ch            closed            closed            closed

          1A0h             open              open              open

          1A4h            closed             open              open

          1A8h             open             closed             open

          1ACh            closed            closed             open

                        USER CONFIGURABLE SETTINGS

               Function                   Location           Setting

  »   Floppy drive port address is           W7              closed
      3F0-3F7h

      Floppy drive port address is           W7               open
      370-377h

  »   Drive 0 sector type is soft            W10              open

      Drive 0 sector type is hard            W10             closed

  »   Drive 0 set for ST506 drive            W11              open

      Drive 0 set for ESDI drive             W11             closed

  »   Drive 0 set for fixed media            W12              open
      drive

      Drive 0 set for removable              W12             closed
      media drive

  »   Drive 1 sector type is soft            W13              open

      Drive 1 sector type is hard            W13             closed

  »   Drive 1 set for ST506 drive            W14              open

      Drive 1 set for ESDI drive             W14             closed

  »   Drive 1 set for fixed media            W15              open
      drive

      Drive 1 set for removable              W15             closed
      media drive

                             BYTES PER SECTOR

    Bytes per sector/sectors per           W8                  W9
               track

  »              512/17                   open                open

                 512/18                  closed               open

                 1024/9                   open               closed

                 1056/9                  closed              closed

                    MISCELLANEOUS TECHNICAL NOTES

  Jumpers W21, W23, W24, W25 are factory configured - do not alter.