TEXT View Source
# SCIENTIFIC MICRO SYSTEMS, INC.
OMTI 7250
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 50-pin SCSI interface |
|---------------+--------------------------------------------|
| Size: | 5.75" x 8" |
|---------------+--------------------------------------------|
| Hard drive | Up to two ST506/412 MFM drives, up to two |
| supported: | ST506/412 RLL 2,7 drives, up to two ESDI |
| | drives |
|---------------+--------------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, 1.44MB drives or |
| supported: | 8" |
|---------------+--------------------------------------------|
| | |
+------------------------------------------------------------+
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 | J7 |
|-------------------------------------------+----------------|
| DC power connector | J10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|----------------------------------+--------------+----------|
| » | SCSI parity enabled | W4 | closed |
|----+-----------------------------+--------------+----------|
| » | SCSI parity disabled | W4 | open |
|----+-----------------------------+--------------+----------|
| » | Factory configured - do not | W5 | open |
| | alter | | |
|----+-----------------------------+--------------+----------|
| » | ST506/412 interface for | W6 | open |
| | drive select 1 enabled | | |
|----+-----------------------------+--------------+----------|
| » | ESDI interface for drive | W6 | closed |
| | select 1 enabled | | |
|----+-----------------------------+--------------+----------|
| » | ST506/412 interface for | W7 | open |
| | drive select 2 enabled | | |
|----+-----------------------------+--------------+----------|
| » | ESDI interface for drive | W7 | closed |
| | select 2 enabled | | |
|----+-----------------------------+--------------+----------|
| » | 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 | | |
|----+-----------------------------+--------------+----------|
| » | Ready override to FDC 765 | W17 | open |
| | disabled (Rev. B only) | | |
|----+-----------------------------+--------------+----------|
| » | Ready override to FDC 765 | W17 | closed |
| | enabled (Rev. B only) | | |
|----+-----------------------------+--------------+----------|
| » | Motor On signal delay | W18 | open |
| | enabled | | |
|----+-----------------------------+--------------+----------|
| » | Motor On signal enabled | W18 | closed |
|----+-----------------------------+--------------+----------|
| » | Factory configured - do not | W37 | open |
| | alter | | |
|----+-----------------------------+--------------+----------|
| » | Factory configured - do not | W38 | open |
| | alter | | |
|----+-----------------------------+--------------+----------|
| » | Factory configured - do not | W39 | open |
| | alter | | |
|------------------------------------------------------------|
| Note: Drive select 1 & 2 refer to the drive select |
| jumper setting on the drive itself and should be set to |
| 1 & 2 respectively. |
| |
| The location of W39 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LUN 0 DISK TYPE CONFIGURATION |
|------------------------------------------------------------|
| Drive Type | W9 | W10 |
|-------------------------------+--------------+-------------|
| » | ST506/412 | open | open |
|---+---------------------------+--------------+-------------|
| » | ESDI | closed | open |
|---+---------------------------+--------------+-------------|
| » | Removable ST506/412 | open | closed |
|---+---------------------------+--------------+-------------|
| » | Flexible disk | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LUN 1 DISK TYPE CONFIGURATION |
|------------------------------------------------------------|
| Drive Type | W12 | W13 |
|-------------------------------+--------------+-------------|
| » | ST506/412 | open | open |
|---+---------------------------+--------------+-------------|
| » | ESDI | closed | open |
|---+---------------------------+--------------+-------------|
| » | Removable ST506/412 | open | closed |
|---+---------------------------+--------------+-------------|
| » | Flexible disk | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LUN 0/1 FLEXIBLE DISK DATA RATE |
|------------------------------------------------------------|
| Data Rate | W8(Lun 0) | W11(Lun 1) |
|-----------------------+-----------------+------------------|
| » | 250 Kbit | open | open |
|------+----------------+-----------------+------------------|
| » | 500 Kbit | closed | closed |
|------------------------------------------------------------|
| Note: These settings apply only when W9 & W10 are both |
| closed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LUN 0/1 SECTOR TYPE CONFIGURATION |
|------------------------------------------------------------|
| Mode | W8(Lun 0) | W11(Lun 1) |
|-------------------------------+-------------+--------------|
| » | Soft sector enabled | open | open |
|-----+-------------------------+-------------+--------------|
| » | Hard sector enabled | closed | closed |
|------------------------------------------------------------|
| Note: These settings apply only when drive type is set to |
| ST506/412. |
+------------------------------------------------------------+