SCIENTIFIC MICROSYSTEMS, INC.
OMTI 3520, OMTI 3527
|
Maximum On-board Memory |
8KB |
|
Data Bus |
External |
|
Card Size |
3.5 in. form factor |
|
Hard Drives supported |
Two ST-506/412(MFM) drives on OMTI 3520 Two ST-506/412(2,7 RLL) drives on OMTI 3527 |
|
Floppy drives supported |
None |
|
CONNECTIONS | |||
|
Function |
Location |
Function |
Location |
|
50-pin SCSI connector - external |
J1 |
20-pin data cable connector - drive 1 |
J3 |
|
34-pin cable connector - hard drive |
J2 |
20-pin data cable connector - drive 2 |
J4 |
|
Note: J1 is the interface between the host computer and the OMTI 3520/3527. See Miscellaneous Technical Note. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
SCSI parity check enabled |
W4 |
Closed | |
|
SCSI parity check disabled |
W4 |
Open | |
|
Factory configured - do not alter |
W5 |
Unidentified | |
|
Factory configured - do not alter |
W6 |
Unidentified | |
|
Factory configured - do not alter |
W7 |
Unidentified | |
|
Factory configured - do not alter |
W8 |
Unidentified | |
|
Factory configured - do not alter |
W9 |
Unidentified | |
|
Factory configured - do not alter |
W10 |
Unidentified | |
|
Factory configured - do not alter |
W11 |
Unidentified | |
|
Factory configured - do not alter |
W12 |
Unidentified | |
|
Factory configured - do not alter |
W13 |
Unidentified | |
|
Termination power from board |
W14 |
Pins 1 & 2 closed | |
|
Termination power from SCSI bus |
W14 |
Pins 2 & 3 closed | |
|
Factory configured - do not alter |
W15 |
Unidentified | |
|
SCSI ID SELECTION | ||||
|
Setting |
W1 |
W2 |
W3 | |
|
0 |
Open |
Open |
Open | |
|
1 |
Closed |
Open |
Open | |
|
2 |
Open |
Closed |
Open | |
|
3 |
Closed |
Closed |
Open | |
|
4 |
Open |
Open |
Closed | |
|
5 |
Closed |
Open |
Closed | |
|
6 |
Open |
Closed |
Closed | |
|
7 |
Closed |
Closed |
Closed | |
|
MISCELLANEOUS TECHNICAL NOTE |
|
Note: The OMTI 3520 and OMTI 3527 controllers are connected to the host system via the SCSI bus (connector J1). Up to seven SCSI devices may be connected to this bus and an OMTI 3520/3527 controller is considered to be one of these devices. Multiple controllers may be attached, with each controller assigned a unique SCSI ID using jumpers W1, W2 and W3. |