
SCIENTIFIC MICRO SYSTEMS, INC.

OMTI 5200 (REV. E), 5204 (REV. B), 5300 (REV. D),

5400 (REV. C)

  Data bus:                   50-pin SCSI interface

  Size:                       5.75" x 8"

  Hard drive supported:       Up to three ST506/412 MFM drives (5300), up
                              to four ST506/412 MFM drives (5200, 5204,
                              5400)

  Floppy drives supported:    Two 360KB, 720KB (all except 5300) 1.2MB,
                              1.44MB (5200, 5400)



[Image]

                            CONNECTIONS

                   Function                          Location

  50-pin SCSI interface                                 J1

  34-pin MFM disk control connector                     J2

  20-pin data cable connector                           J3

  20-pin data cable connector                           J4

  34-pin floppy drive connector (not in 5300)           J7

  50-pin tape drive connector (5300, 5400)              J8

  DC power connector                                   J10

                                 SCSI ADDRESS

  SCSI    W0/0     W0/1     W0/2     W0/3    W0/4     W0/5     W0/6     W0/7
   ID

     0  closed    open     open     open    open     open     open     open

     1   open    closed    open     open    open     open     open     open

     2   open     open    closed    open    open     open     open     open

     3   open     open     open    closed   open     open     open     open

     4   open     open     open     open    closed   open     open     open

     5   open     open     open     open    open     closed   open     open

     6   open     open     open     open    open     open     closed   open

     7   open     open     open     open    open     open     open     closed

                        USER CONFIGURABLE SETTINGS

                Function                     Location          Setting

     SCSI parity enabled                  W1/pins 1 & 2       closed

     SCSI parity disabled                 W1/pins 2 & 3       closed

     QIC--02 (Tape drive) parity          W2/pins 1 & 2       closed
      enabled (5300 & 5400)

     QIC--02 (Tape drive) parity          W2/pins 2 & 3       closed
      disabled (5300 & 5400)

     LUN 0 supports ST506/412 MFM              W5              open
      disk type

     LUN 0 supports flexible disk              W5             closed
      (5400, 5200, 5204)

     LUN 0 is reserved (5300)                  W5             closed

     LUN 1 supports ST506/412 MFM              W6              open
      disk type

     LUN 1 supports flexible disk              W6             closed
      (5400, 5200, 5204)

     LUN 1 is reserved (5300)                  W6             closed

     LUN 2 supports ST506/412 MFM              W7              open
      disk type

     LUN 2 supports flexible disk              W7             closed
      (5400, 5200, 5204)

     LUN 2 is reserved (5300)                  W7             closed

     LUN 3 supports ST506/412 MFM              W8              open
      disk type (5200, 5204)

     LUN 3 supports tape drive (5400,          W8              open
      5300)

     LUN 3 supports flexible disk              W8             closed
      (5400, 5200, 5204)

     LUN 3 supports ST506/412 MFM              W8             closed
      disk type (5300)

     Motor on signal always enabled            W14            closed
      (5200, 5204, 5400)

     Motor on signal enabled by                W14             open
      command

     Ready override signal for                 W15            closed
      flexible disk enabled (for
      drives not supporting Ready
      signal)

     Ready override signal for                 W15             open
      flexible disk disabled (for
      drives  supporting Ready
      signal)

     Factory configured - do not               W17              N/A
      alter

     Factory configured - do not               W18              N/A
      alter

                           SECTOR CONFIGURATION

     Bytes/Sector         Sector/Track            W3             W4

           256                32               closed          open

           512                17                open          closed

            512                18                open           open

          1024                 9               closed         closed

                       MISCELLANEOUS TECHNICAL NOTES

  When installing ST506/412 fixed/removable, 2 LUNs are used which limits
    the number of the remaining LUNs and therefore the number of drives
                          that can be supported.

