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# SCIENTIFIC MICRO SYSTEMS
OMTI 8247
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 16-bit, ISA |
|-------------------+----------------------------------------|
| Size: | Full-length, full-height card |
|-------------------+----------------------------------------|
| Hard drive | Two ST506/412 (RLL) drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, or 1.44MB |
| supported: | drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-----------------------------------------------+------------|
| 34-pin floppy drive connector - internal | J1 |
|-----------------------------------------------+------------|
| 20-pin data connector - drive 0 | J3 |
|-----------------------------------------------+------------|
| 20-pin data connector - drive 1 | J4 |
|-----------------------------------------------+------------|
| 34-pin drive control connector - floppy drive | J5 |
|-----------------------------------------------+------------|
| 4-pin connector - drive active LED | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DISK ADDRESS |
|------------------------------------------------------------|
| Setting | W1 | W2 |
|--------------------+-------------------+-------------------|
| Primary Address | closed | open |
|--------------------+-------------------+-------------------|
| Secondary Address | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| READ-RECOVERY SELECT |
|------------------------------------------------------------|
| Setting | W6 |
|----------------------------------------------+-------------|
| Micro-stepping read-recovery mode - enabled | closed |
|----------------------------------------------+-------------|
| Micro-stepping read-recovery mode - disabeld | open |
+------------------------------------------------------------+