TEXT View Source
# SCIENTIFIC MICRO SYSTEMS
OMTI 8620, OMTI 8627
Data bus: 16-bit, ISA
Size: Full-length, full-height card
Hard drives OMTI 8620:Two MFM ST506/ST412 drives or
supported: ESDI drives
OMTI 8627:Two RLL ST506/ST412 or ESDI
drives
Floppy drives Two 360KB, 720KB, 1.2MB, 1.44MB drives
supported:
Sector interleave: 1:1
Maximum heads/cyl.: 16 heads and 2048 cylinders
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|---------------------------------------------+--------------|
| 34-pin control cable connecter-floppy drive | J1 |
|---------------------------------------------+--------------|
| 34-pin control cable connecter-hard drive | J2 |
|---------------------------------------------+--------------|
| 20-pin data cable connecter-drive 0 | J3 |
|---------------------------------------------+--------------|
| 20-pin data cable connecter-drive 1 | J4 |
|---------------------------------------------+--------------|
| 4-pin connecter-drive active LED | J5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | Drive 1 set for fixed media drive | W4 | open |
|---+-----------------------------------+----------+---------|
| | Drive 1 set for removable media | W4 | closed |
| | drive | | |
|---+-----------------------------------+----------+---------|
| » | Drive 1 set for ST506 drive | W5 | open |
|---+-----------------------------------+----------+---------|
| | Drive 1 set for ESDI drive | W5 | closed |
|---+-----------------------------------+----------+---------|
| » | Drive 1 soft sectored | W6 | open |
|---+-----------------------------------+----------+---------|
| | Drive 1 hard sectored | W6 | closed |
|---+-----------------------------------+----------+---------|
| » | Drive 0 set for fixed media drive | W7 | open |
|---+-----------------------------------+----------+---------|
| | Drive 0 set for removable media | W7 | closed |
| | drive | | |
|---+-----------------------------------+----------+---------|
| » | Drive 0 set for ST506 drive | W8 | open |
|---+-----------------------------------+----------+---------|
| | Drive 0 set for ESDI drive | W8 | closed |
|---+-----------------------------------+----------+---------|
| » | Drive 0 soft sectored | W9 | open |
|---+-----------------------------------+----------+---------|
| | Drive 0 hard sectored | W9 | closed |
|---+-----------------------------------+----------+---------|
| | If the drive on CN3 is a ESDI | W12 | open |
| | drive this trace must be cut | | |
|---+-----------------------------------+----------+---------|
| | If the drive on CN4 is a ESDI | W13 | open |
| | drive this trace must be cut | | |
|---+-----------------------------------+----------+---------|
| » | Floppy drive port address is | W14 | open |
| | 3F0-3F7 | | |
|---+-----------------------------------+----------+---------|
| | Floppy drive port address is | W14 | closed |
| | 370-377 | | |
|---+-----------------------------------+----------+---------|
| » | BIOS base address is C8000h | W15 | open |
|---+-----------------------------------+----------+---------|
| | BIOS base address is CA000h | W15 | closed |
|---+-----------------------------------+----------+---------|
| » | BIOS enabled | W16 | open |
|---+-----------------------------------+----------+---------|
| | BIOS disabled | W16 | closed |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W20 | N/A |
|---+-----------------------------------+----------+---------|
| » | I/O speed set to high performance | W21 | open |
| | string mode | | |
|---+-----------------------------------+----------+---------|
| | I/O speed set to loop | W21 | closed |
|---+-----------------------------------+----------+---------|
| » | If BIOS is #1002661, then drive 0 | W22 | open |
| | parameters are set to 4 hds. and | | |
| | 612 cyl. If BIOS is #1002662, | | |
| | then drive 0 parameter are set | | |
| | to 4 hds. and 615 cyl. | | |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W22 | closed |
|---+-----------------------------------+----------+---------|
| » | If BIOS is #1002661, then drive 1 | W23 | open |
| | parameters are set to 4 hds. and | | |
| | 612 cyl.If BIOS is #1002662, then | | |
| | drive 1 parameter are set to 4 | | |
| | hds. and 615 cyl. | | |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W23 | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECTOR CONFIGURATION |
|------------------------------------------------------------|
| Jumper | Jumper | BPS (ST506 | SPT- 8620 | SPT- |
| W10 | W11 | only) | | 8627 |
|-----------+-----------+-------------+-----------+----------|
| open | open | 512 | 17 | 26 |
|-----------+-----------+-------------+-----------+----------|
| open | closed | 512 | 17 | 26 |
|-----------+-----------+-------------+-----------+----------|
| closed | open | 1024 | 18 | 26 |
|-----------+-----------+-------------+-----------+----------|
| closed | closed | 1056 | 9 | 13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS |
|------------------------------------------------------------|
| Address | Jumper W17 | Jumper W18 | Jumper W19 |
|------------+---------------+---------------+---------------|
| 320h | open | open | open |
|------------+---------------+---------------+---------------|
| 324h | open | open | closed |
|------------+---------------+---------------+---------------|
| 328h | open | closed | open |
|------------+---------------+---------------+---------------|
| 32Ch | open | closed | closed |
|------------+---------------+---------------+---------------|
| 1A0h | closed | open | open |
|------------+---------------+---------------+---------------|
| 1A4h | closed | open | closed |
|------------+---------------+---------------+---------------|
| 1A8h | closed | closed | open |
|------------+---------------+---------------+---------------|
| 1ACh | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE TYPE CONFIGURATION - #1002579 |
|------------------------------------------------------------|
| DRIVE 0 | DRIVE 2 | | |
|----------+----------+----------+---------------------------|
| W20 | W21 | W22 | W23 | Cyl. | Hds. |
|----------+----------+----------+----------+--------+-------|
| closed | closed | closed | closed | ESDI | ESDI |
|----------+----------+----------+----------+--------+-------|
| open | closed | open | closed | 987 | 7 |
|----------+----------+----------+----------+--------+-------|
| closed | open | closed | open | 918 | 15 |
|----------+----------+----------+----------+--------+-------|
| open | open | open | open | 612 | 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE TYPE CONFIGURATION - #1002578 |
|------------------------------------------------------------|
| DRIVE 0 | DRIVE 2 | | |
|----------+----------+----------+---------------------------|
| W20 | W21 | W22 | W23 | Cyl. | Hds. |
|----------+----------+----------+----------+--------+-------|
| closed | closed | closed | closed | ESDI | ESDI |
|----------+----------+----------+----------+--------+-------|
| open | closed | open | closed | 820 | 6 |
|----------+----------+----------+----------+--------+-------|
| closed | open | closed | open | 1024 | 9 |
|----------+----------+----------+----------+--------+-------|
| open | open | open | open | 615 | 4 |
+------------------------------------------------------------+