(TXT) View Source
       
       # SCIENTIFIC MICRO SYSTEMS
       
          OMTI 810, OMTI 812, OMTI 820, OMTI 822
       
          Data bus: 16-bit, ISA
       
          Size: Full-length, full-height card
       
          Hard drives supported:  Up to seven SCSI devices
       
          Floppy drives supported: OMTI 81x: None
       
                     OMTI 82x: Two 360KB, 720KB, 1.2MB, 1.44MB
       
          Maximum heads/cyl.: 16 heads and 1024 cylinders
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                    Function                     | Location |
          |-------------------------------------------------+----------|
          | 50-pin SCSI connector-internal                  |    J1    |
          |-------------------------------------------------+----------|
          | 50-pin SCSI connector-external (Models 8x2      |    J2    |
          | only)                                           |          |
          |-------------------------------------------------+----------|
          | 34-pin control cable connector-floppy drive     |    J3    |
          |-------------------------------------------------+----------|
          | 4-pin connector-drive active LED                |    J4    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                USER CONFIGURABLE SETTINGS                  |
          |------------------------------------------------------------|
          |              Function              | Location |  Setting   |
          |------------------------------------+----------+------------|
          | » | SCSI parity check enabled      |    W3    |   closed   |
          |---+--------------------------------+----------+------------|
          |   | SCSI parity check disabled     |    W3    |    open    |
          |---+--------------------------------+----------+------------|
          | » | Factory configured - do not    |    W4    |    open    |
          |   | alter                          |          |            |
          |---+--------------------------------+----------+------------|
          | » | Factory configured - do not    |   W10    |    open    |
          |   | alter                          |          |            |
          |---+--------------------------------+----------+------------|
          | » | AT-type floppy drives          |   W11    |    open    |
          |   | supported (Models 82x only)    |          |            |
          |---+--------------------------------+----------+------------|
          |   | Non-stand. floppy drives       |   W11    |   closed   |
          |   | supported (Models 82x only)    |          |            |
          |---+--------------------------------+----------+------------|
          |   | Factory set on board 32K PROM  |   W15    |    open    |
          |   | size                           |          |            |
          |---+--------------------------------+----------+------------|
          | » | Factory configured - do not    |   W26    |    open    |
          |   | alter                          |          |            |
          |---+--------------------------------+----------+------------|
          | » | SCSI-2 RSVD lines grounded     |   W32    |   closed   |
          |   | (terminators installed)        |          |            |
          |---+--------------------------------+----------+------------|
          |   | SCSI-2 RSVD lines not grounded |   W32    |    open    |
          |   | (terminators removed)          |          |            |
          |---+--------------------------------+----------+------------|
          | » | Floppy drive port address is   |   W33    | pins 1 & 2 |
          |   | 3F0-3F7 (Models 82x only)      |          |   closed   |
          |---+--------------------------------+----------+------------|
          |   | Floppy drive port address is   |   W33    | pins 2 & 3 |
          |   | 370-377 (Models 820x only)     |          |   closed   |
          |---+--------------------------------+----------+------------|
          | » | Floppy drive enabled           |   W35    |   closed   |
          |---+--------------------------------+----------+------------|
          |   | Floppy drive disabled          |   W35    |    open    |
          |---+--------------------------------+----------+------------|
          | » | Power-ground and               |   W44    |    open    |
          |   | chassis-ground separate        |          |            |
          |---+--------------------------------+----------+------------|
          |   | Power-ground and               |   W44    |   closed   |
          |   | chassis-ground connected       |          |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SCSI ADDRESS                         |
          |------------------------------------------------------------|
          |    Address    |      W0      |      W1      |      W2      |
          |---------------+--------------+--------------+--------------|
          |    |    0     |    closed    |    closed    |    closed    |
          |----+----------+--------------+--------------+--------------|
          |    |    1     |     open     |    closed    |    closed    |
          |----+----------+--------------+--------------+--------------|
          |    |    2     |    closed    |     open     |    closed    |
          |----+----------+--------------+--------------+--------------|
          |    |    3     |     open     |     open     |    closed    |
          |----+----------+--------------+--------------+--------------|
          |    |    4     |    closed    |    closed    |     open     |
          |----+----------+--------------+--------------+--------------|
          |    |    5     |     open     |    closed    |     open     |
          |----+----------+--------------+--------------+--------------|
          |    |    6     |    closed    |     open     |     open     |
          |----+----------+--------------+--------------+--------------|
          | »  |    7     |     open     |     open     |     open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       BIOS ADDRESS                         |
          |------------------------------------------------------------|
          |      Select      |     W15     |     W16     |     W17     |
          |------------------+-------------+-------------+-------------|
          |   |    C0000h    |   closed    |   closed    |   closed    |
          |---+--------------+-------------+-------------+-------------|
          |   |    C8000h    |    open     |   closed    |   closed    |
          |---+--------------+-------------+-------------+-------------|
          |   |    D0000h    |   closed    |    open     |   closed    |
          |---+--------------+-------------+-------------+-------------|
          | » |    D8000h    |    open     |    open     |   closed    |
          |---+--------------+-------------+-------------+-------------|
          |   |    E0000h    |   closed    |   closed    |    open     |
          |---+--------------+-------------+-------------+-------------|
          |   |    E8000     |    open     |   closed    |    open     |
          |---+--------------+-------------+-------------+-------------|
          |   |    F0000h    |   closed    |    open     |    open     |
          |---+--------------+-------------+-------------+-------------|
          |   |    F8000h    |    open     |    open     |    open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     I/O PORT ADDRESS                       |
          |------------------------------------------------------------|
          | Address  |   W5    |   W6    |   W7    |   W8    |   W9    |
          |----------+---------+---------+---------+---------+---------|
          |   | 100  | closed  | closed  | closed  |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 120  |  open   | closed  | closed  |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 140  | closed  |  open   | closed  |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 160  |  open   |  open   | closed  |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 180  | closed  | closed  |  open   |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 1A0  |  open   | closed  |  open   |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 1C0  | closed  |  open   |  open   |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 1E0  |  open   |  open   |  open   |  open   | closed  |
          |---+------+---------+---------+---------+---------+---------|
          |   | 200  | closed  | closed  | closed  | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 220  |  open   | closed  | closed  | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 240  | closed  |  open   | closed  | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 260  |  open   |  open   | closed  | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 280  | closed  | closed  |  open   | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 2A0  |  open   | closed  |  open   | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 2C0  | closed  |  open   |  open   | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 2E0  |  open   |  open   |  open   | closed  |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 300  | closed  | closed  | closed  |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 320  |  open   | closed  | closed  |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          | » | 340  | closed  |  open   | closed  |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 360  |  open   |  open   | closed  |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 380  | closed  | closed  |  open   |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 3A0  |  open   | closed  |  open   |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 3C0  | closed  |  open   |  open   |  open   |  open   |
          |---+------+---------+---------+---------+---------+---------|
          |   | 3E0  |  open   |  open   |  open   |  open   |  open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DMA CHANNEL                         |
          |------------------------------------------------------------|
          | Channel |  W20   |  W21   |  W22   |  W23  |  W24  |  W25  |
          |---------+--------+--------+--------+-------+-------+-------|
          |  | DRQ3 | closed |  open  |  open  | open  |closed |closed |
          |--+------+--------+--------+--------+-------+-------+-------|
          |» | DRQ5 |  open  | closed |  open  | open  |closed | open  |
          |--+------+--------+--------+--------+-------+-------+-------|
          |  | DRQ6 |  open  |  open  | closed | open  | open  |closed |
          |--+------+--------+--------+--------+-------+-------+-------|
          |  | DRQ7 |  open  |  open  |  open  |closed | open  | open  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |      IRQ       |   W27    |   W28    |   W29    |   W30    |
          |----------------+----------+----------+----------+----------|
          |   |  Disabled  |   N/A    |   N/A    |   N/A    |  closed  |
          |---+------------+----------+----------+----------+----------|
          |   |    IRQ3    |  closed  |  closed  |  closed  |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |    IRQ4    |   open   |  closed  |  closed  |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |    IRQ5    |  closed  |   open   |  closed  |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |    IRQ6    |   open   |  closed  |  closed  |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |    IRQ7    |  closed  |  closed  |   open   |   open   |
          |---+------------+----------+----------+----------+----------|
          | » |   IRQ12    |   open   |  closed  |   open   |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |   IRQ14    |  closed  |   open   |   open   |   open   |
          |---+------------+----------+----------+----------+----------|
          |   |   IRQ15    |   open   |   open   |   open   |   open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTES                |
          |------------------------------------------------------------|
          | W12-14, W31, W34, W36, W37, W43, W45 are factory           |
          | configurable or Not used and are hard wired on some board  |
          | revisions. The default for these jumpers is "open", with a |
          | jumper stored on pin 2.                                    |
          +------------------------------------------------------------+