SCIENTIFIC MICRO SYSTEMS
OMTI 8120, OMTI 8127
Data bus: 16-bit, ISA
Size: Half-length, full-height card
Hard drives supported: OMTI 8120:Two MFM ST506/ST412 drives
OMTI 8127:Two RLL ST506/ST412 drives
Floppy drives supported: None
Maximum heads/cyl.: 16 heads and 2048 cylinders
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 |
5-pin connector-DC power | J4 |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
» | Factory configured - do not alter | W1 | closed |
If BIOS is #1002661, then drive 0 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. | W1 | open | |
If BIOS is #1002661, then drive 1 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. | W2 | open | |
» | Factory configured - do not alter | W2 | closed |
» | I/O speed set to high performance string mode | W3 | open |
I/O speed set to loop | W3 | closed | |
» | Factory configured - do not alter | W4 | N/A |
» | BIOS base address is C8000h | W9 | open |
BIOS base address is CA000h | W9 | closed |
I/O PORT ADDRESS | ||||
Address | Jumper W5 | Jumper W6 | Jumper W7 | |
» | 320h | open | open | open |
324h | closed | open | open | |
328h | open | closed | open | |
32Ch | closed | closed | open | |
1A0h | open | open | closed | |
1A4h | closed | open | closed | |
1A8h | open | closed | closed | |
1ACh | closed | closed | closed |
DRIVE CONFIGURATION | |||||
DRIVE 1 | DRIVE 0 | BIOS #1002579 | |||
Jumper W1 | Jumper W2 | Jumper W3 | Jumper W4 | Cyl. | Hds. |
closed | closed | closed | closed | - | - |
open | closed | open | closed | 987 | 7 |
closed | open | closed | open | 918 | 15 |
open | open | open | open | 612 | 4 |
DRIVE CONFIGURATION | |||||
DRIVE 1 | DRIVE 0 | BIOS #1002579 | |||
Jumper W1 | Jumper W2 | Jumper W3 | Jumper W4 | Cyl. | Hds. |
closed | closed | closed | closed | - | - |
open | closed | open | closed | 820 | 6 |
closed | open | closed | open | 1024 | 9 |
open | open | open | open | 615 | 4 |