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# SCIENTIFIC MICRO SYSTEMS
OMTI 5526, OMTI 5529
Data bus: 8-bit, ISA
Size: Half-length, full-height card
Hard drives supported: OMTI 5526:Two MFM ST506/ST412 drives
OMTI 5529:Two RLL ST506/ST412 drives
Floppy drives supported: None
Maximum heads/cyl.: 16 heads and 2048 cylinders
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-------------------------------------------+----------------|
| 34-pin control cable connector-hard drive | J1 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 0 | J2 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 1 | J3 |
|-------------------------------------------+----------------|
| 4-pin drive power connector | J4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|--------------------------------------+-----------+---------|
| » | 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 | | |
|---+----------------------------------+-----------+---------|
| » | Not documented | W17-19 & | N/A |
| | | W26-30 | |
|---+----------------------------------+-----------+---------|
| » | BIOS enabled | W7 | open |
|---+----------------------------------+-----------+---------|
| | BIOS disabled | W7 | closed |
|---+----------------------------------+-----------+---------|
| » | BIOS base address is C800h | W8 | open |
|---+----------------------------------+-----------+---------|
| | BIOS base address is CA00h | W8 | closed |
|---+----------------------------------+-----------+---------|
| » | Drive 0 soft sectored | W11 | open |
|---+----------------------------------+-----------+---------|
| | Drive 0 hard sectored | W11 | closed |
|---+----------------------------------+-----------+---------|
| » | Drive 1 soft sectored | W14 | open |
|---+----------------------------------+-----------+---------|
| | Drive 1 hard sectored | W14 | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS |
|------------------------------------------------------------|
| Address | Jumper W5 | Jumper W6 |
|-------------------+--------------------+-------------------|
| » | 320h | open | open |
|---+---------------+--------------------+-------------------|
| | 324h | closed | open |
|---+---------------+--------------------+-------------------|
| | 328h | open | closed |
|---+---------------+--------------------+-------------------|
| | 32Ch | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| W1 through W4 are used to configure the drive type. To |
| support most of the drives on the market, there have been |
| several different BIOS's offered. The different BIOS drive |
| type tables are listed with the 5510; The jumper settings |
| are the same for the 5526 and the 5526/9 |
+------------------------------------------------------------+