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 |