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# SCIENTIFIC MICRO SYSTEMS
OMTI 5527B
Data bus: 8-bit ISA
Size: Half-length, full-height card
Hard drive supported: Two RLL ST-506/412 drives
Floppy drives supported: None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|---------------------------------------------+--------------|
| 34-pin control cable connector - hard drive | J1 |
|---------------------------------------------+--------------|
| 20-pin data cable connector - drive 1 | J2 |
|---------------------------------------------+--------------|
| 20-pin data cable connector - drive 2 | J3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | BIOS controller enabled | W7 | Open |
|---+-----------------------------------+----------+---------|
| | BIOS controller disabled | W7 | Closed |
|---+-----------------------------------+----------+---------|
| » | BIOS controller address is C8000h | W8 | Open |
|---+-----------------------------------+----------+---------|
| | BIOS controller address is CA000h | W8 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1 |
| |
| (BIOS 1002312-R7) |
|------------------------------------------------------------|
| Model |Cylinder|Head|Step| W1 | W2 | W3 | W4 |
| | Nbr. |Nbr.|Rate| | | | |
| | | | | | | | |
| | | |( m | | | | |
|-------------+--------+----+----+------+------+------+------|
|Lapine Titan | 615 | 4 | 25 | Open | Open | Open | Open |
| (3.5 in.) | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| Maxtor | 1024 | 8 | 10 |Closed|Closed|Closed| Open |
| XT-1085 | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| Maxtor | 918 | 15 | 10 |Closed| Open |Closed|Closed|
| XT-1140 | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| Miniscribe | 612 | 4 | 25 |Closed| Open |Closed| Open |
| 3425 | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
|Microscience | 12 | 4 | 25 | Open | Open |Closed| Open |
| HH7156 | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| NEC D3126 | 640 | 8 | 25 | Open | Open |Closed|Closed|
| (3.5 in.) | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| NEC 5126 | 612 | 4 | 25 |Closed| Open |Closed| Open |
|-------------+--------+----+----+------+------+------+------|
|Newbury Data | 612 | 8 | 25 | Open |Closed| Open |Closed|
| Penny | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
|Rodime RO352 | 306 | 4 | 25 |Closed| Open | Open | Open |
|-------------+--------+----+----+------+------+------+------|
|Rodime R0204E| 640 | 8 | 25 | Open | Open |Closed|Closed|
|-------------+--------+----+----+------+------+------+------|
|Seagate ST238| 615 | 4 | 25 | Open | Open | Open | Open |
|-------------+--------+----+----+------+------+------+------|
| Syquest SQ | 615 | 2 | 25 |Closed|Closed| Open | Open |
| 319 | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
|Tandon TM 502| 306 | 4 | 25 | Open |Closed| Open | Open |
|-------------+--------+----+----+------+------+------+------|
|Tandon TM755 | 980 | 5 | 25 |Closed|Closed| Open |Closed|
|-------------+--------+----+----+------+------+------+------|
| Toshiba | 830 | 7 | 10 |Closed| Open | Open |Closed|
| MK54FB | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
| Toshiba | 830 | 10 | 10 | Open |Closed|Closed| Open |
| MK56FB | | | | | | | |
|-------------+--------+----+----+------+------+------+------|
|Tulin R0202E | 640 | 4 | 25 |Closed|Closed|Closed|Closed|
|-------------+--------+----+----+------+------+------+------|
|Vertex/Priam | 987 | 5 | 10 | Open | Open | Open |Closed|
| V150 | | | | | | | |
|------------------------------------------------------------|
|Note: Install jumpers W1 through W4 in a two-drive system |
|only when both drives are the same model |
| |
|and the model is listed above. If drive model is not listed |
|above, do not install W1 through W4. |
| |
|The Miniscribe 3425, Tandon TM 502 and Tandon TM755 models |
|listed above are characterized |
| |
|by Reduce Write Current at cylinder numbers 128, 128, 700 |
|respectively. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1 |
| |
| (BIOS 1002571-R10) |
|------------------------------------------------------------|
| Model |Cylinder|Head | W1 | W2 | W3 | W4 |
| | Nbr. |Nbr. | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Atasi 3085 | 1024 | 8 |Closed |Closed |Closed |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
|Lapine LT300 | 616 | 4 | Open | Open |Closed |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
|Microscience | 612 | 4 | Open |Closed |Closed |Closed |
| HH330 | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
|Microscience | 612 | 4 | Open |Closed |Closed |Closed |
| HH738 | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Miniscribe | 615 | 4 | Open | Open | Open | Open |
| 3438 | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Miniscribe | 612 | 4 | Open |Closed |Closed |Closed |
| 8438 | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Peripheral | 615 | 6 |Closed | Open |Closed |Closed |
| Tech 357R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Priam V170 | 987 | 7 |Closed |Closed | Open |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
| Priam V185 | 1166 | 7 | Open |Closed | Open |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
| Priam 514 | 1224 | 11 |Closed | Open | Open |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
| Priam 519 | 1224 | 15 | Open | Open | Open |Closed |
|-------------+--------+-----+-------+-------+-------+-------|
| Seagate | 615 | 4 | Open | Open | Open | Open |
| ST238R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Seagate | 820 | 4 |Closed |Closed |Closed | Open |
| ST251R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Seagate | 820 | 6 | Open |Closed |Closed | Open |
| ST277R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Seagate | 1024 | 5 |Closed | Open |Closed | Open |
| ST4077R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Seagate | 1024 | 9 |Closed | Open |Closed | Open |
| ST4144R | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Tobshiba | 830 | 5 |Closed |Closed | Open | Open |
| MK53FB | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Toshiba | 830 | 7 | Open |Closed | Open | Open |
| MK54FB | | | | | | |
|-------------+--------+-----+-------+-------+-------+-------|
| Toshiba | 830 | 10 |Closed | Open | Open | Open |
| MK56FB | | | | | | |
|------------------------------------------------------------|
|Note: Install jumpers W1 through W4 in a two-drive system, |
|only when both drives are the same model |
| |
|and that model is listed above. If drive model is not listed|
|above, do not install W1 through W4. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DISK I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | W5 | W6 |
|----------------------------+---------------+---------------|
| » | 320h | Open | Open |
|-----+----------------------+---------------+---------------|
| | 324h | Closed | Open |
|-----+----------------------+---------------+---------------|
| | 328h | Open | Closed |
|-----+----------------------+---------------+---------------|
| | 32Ch | Closed | Closed |
+------------------------------------------------------------+