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 í 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.