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# SCIENTIFIC MICRO SYSTEMS, INC.
OMTI 7100, OMTI 7200, OMTI 7400
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 50-pin SCSI interface |
|---------------+--------------------------------------------|
| Size: | 5.25" FF |
|---------------+--------------------------------------------|
| Hard drive | Up to two ST506/412 MFM drives, up to two |
| supported: | ESDI drive |
|---------------+--------------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, 1.44Mb or 8" |
| supported: | drives (except 7100) |
|---------------+--------------------------------------------|
| | |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|---------------------------------------------+--------------|
| 50-pin SCSI interface | J1 |
|---------------------------------------------+--------------|
| 34-pin ESDI or MFM disk control connector | J2 |
|---------------------------------------------+--------------|
| 20-pin data cable connector | J3 |
|---------------------------------------------+--------------|
| 20-pin data cable connector | J4 |
|---------------------------------------------+--------------|
| 34-pin floppy drive connector (not in 7100) | J7 |
|---------------------------------------------+--------------|
| 50-pin tape drive connector (7400 only) | J8 |
|---------------------------------------------+--------------|
| DC power connector | J10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+------------+----------|
| » | SCSI parity enabled | W4 | closed |
|----+-------------------------------+------------+----------|
| » | SCSI parity disabled | W4 | open |
|----+-------------------------------+------------+----------|
| » | Spindle motor starts on power | W5 | closed |
| | up (used with ESDI) | | |
|----+-------------------------------+------------+----------|
| » | Spindle motor starts on | W5 | open |
| | command only (used with ESDI) | | |
|----+-------------------------------+------------+----------|
| » | ST506/412 interface for drive | W6 | open |
| | select 1 enabled | | |
|----+-------------------------------+------------+----------|
| » | ESDI interface for drive | W6 | closed |
| | select 1 enabled | | |
|----+-------------------------------+------------+----------|
| » | ST506/412 interface for drive | W7 | open |
| | select 2 enabled | | |
|----+-------------------------------+------------+----------|
| » | ESDI interface for drive | W7 | closed |
| | select 2 enabled | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W8 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W9 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W10 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W11 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W12 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W13 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | TRMPWR supplied by board | W14/pins 1 | closed |
| | | & 2 | |
|----+-------------------------------+------------+----------|
| » | TRMPWR supplied by SCSI bus | W14/pins 2 | closed |
| | | & 3 | |
|----+-------------------------------+------------+----------|
| » | Ready signal from pin 2 to | W15 | open |
| | FDC 765 disabled | | |
|----+-------------------------------+------------+----------|
| » | Ready signal from pin 2 to | W15 | closed |
| | FDC 765 enabled | | |
|----+-------------------------------+------------+----------|
| » | Ready signal from pin 34 to | W16 | open |
| | FDC 765 disabled | | |
|----+-------------------------------+------------+----------|
| » | Ready signal from pin 34 to | W16 | closed |
| | FDC 765 enabled | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W17 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Motor on signal delay enabled | W18 | open |
|----+-------------------------------+------------+----------|
| » | Motor on signal enabled | W18 | closed |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W21 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W22 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | QIC-02 (tape drive) parity | W25 | closed |
| | enabled (7400 only) | | |
|----+-------------------------------+------------+----------|
| » | QIC-02 (tape drive) parity | W25 | open |
| | disabled (7400 only) | | |
|----+-------------------------------+------------+----------|
| » | Factory configured - do not | W29 | N/A |
| | alter | | |
|----+-------------------------------+------------+----------|
| » | Disk change detection from | W37 | closed |
| | FDD connector pin 2 enabled | | |
|----+-------------------------------+------------+----------|
| » | Disk change detection from | W37 | open |
| | FDD connector pin 2 disabled | | |
|----+-------------------------------+------------+----------|
| » | Disk change detection from | W38 | closed |
| | FDD connector pin 34 enabled | | |
|----+-------------------------------+------------+----------|
| » | Disk change detection from | W38 | open |
| | FDD connector pin 34 disabled | | |
|----+-------------------------------+------------+----------|
| » | Clear disk change signal | W39 | open |
| | disabled | | |
|----+-------------------------------+------------+----------|
| » | Clear disk change signal | W39/pins 1 | closed |
| | enabled | & 2 | |
|------------------------------------------------------------|
| Note: Drive select 1 & 2 refer to the drive select |
| jumper setting on the drive itself and should be set |
| to 1 & 2 respectively. |
| |
| When W39/pins 1 & 2 closed drive select 4 must not be |
| used. |
| |
| Jumpers W15, W16, W17, W18, W37, W38, W39 refer to |
| flexible disk drives and apply only to models 7200 & |
| 7400. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI ADDRESS |
|------------------------------------------------------------|
| SCSI ID | W1 | W2 | W3 |
|---------------+--------------+--------------+--------------|
| » | 0 | open | open | open |
|----+----------+--------------+--------------+--------------|
| » | 1 | closed | open | open |
|----+----------+--------------+--------------+--------------|
| » | 2 | open | closed | open |
|----+----------+--------------+--------------+--------------|
| » | 3 | closed | closed | open |
|----+----------+--------------+--------------+--------------|
| » | 4 | open | open | closed |
|----+----------+--------------+--------------+--------------|
| » | 5 | closed | open | closed |
|----+----------+--------------+--------------+--------------|
| » | 6 | open | closed | close |
|----+----------+--------------+--------------+--------------|
| » | 7 | closed | closed | closed |
+------------------------------------------------------------+