SCIENTIFIC MICRO SYSTEMS, INC.
OMTI 7100, OMTI 7200, OMTI 7400
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Data bus: |
50-pin SCSI interface |
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Size: |
5.25" FF |
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Hard drive supported: |
Up to two ST506/412 MFM drives, up to two ESDI drive |
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Floppy drives supported: |
Two 360KB, 720KB, 1.2MB, 1.44Mb or 8" drives (except 7100) |
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CONNECTIONS | |
|
Function |
Location |
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50-pin SCSI interface |
J1 |
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34-pin ESDI or MFM disk control connector |
J2 |
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20-pin data cable connector |
J3 |
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20-pin data cable connector |
J4 |
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34-pin floppy drive connector (not in 7100) |
J7 |
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50-pin tape drive connector (7400 only) |
J8 |
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DC power connector |
J10 |
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USER CONFIGURABLE SETTINGS | |||
|
Function |
Location |
Setting | |
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SCSI parity enabled |
W4 |
closed | |
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SCSI parity disabled |
W4 |
open | |
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Spindle motor starts on power up (used with ESDI) |
W5 |
closed | |
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Spindle motor starts on command only (used with ESDI) |
W5 |
open | |
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ST506/412 interface for drive select 1 enabled |
W6 |
open | |
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ESDI interface for drive select 1 enabled |
W6 |
closed | |
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ST506/412 interface for drive select 2 enabled |
W7 |
open | |
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ESDI interface for drive select 2 enabled |
W7 |
closed | |
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Factory configured - do not alter |
W8 |
N/A | |
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Factory configured - do not alter |
W9 |
N/A | |
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Factory configured - do not alter |
W10 |
N/A | |
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Factory configured - do not alter |
W11 |
N/A | |
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Factory configured - do not alter |
W12 |
N/A | |
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Factory configured - do not alter |
W13 |
N/A | |
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TRMPWR supplied by board |
W14/pins 1 & 2 |
closed | |
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TRMPWR supplied by SCSI bus |
W14/pins 2 & 3 |
closed | |
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Ready signal from pin 2 to FDC 765 disabled |
W15 |
open | |
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Ready signal from pin 2 to FDC 765 enabled |
W15 |
closed | |
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Ready signal from pin 34 to FDC 765 disabled |
W16 |
open | |
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Ready signal from pin 34 to FDC 765 enabled |
W16 |
closed | |
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Factory configured - do not alter |
W17 |
N/A | |
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Motor on signal delay enabled |
W18 |
open | |
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Motor on signal enabled |
W18 |
closed | |
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Factory configured - do not alter |
W21 |
N/A | |
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Factory configured - do not alter |
W22 |
N/A | |
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QIC-02 (tape drive) parity enabled (7400 only) |
W25 |
closed | |
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QIC-02 (tape drive) parity disabled (7400 only) |
W25 |
open | |
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Factory configured - do not alter |
W29 |
N/A | |
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Disk change detection from FDD connector pin 2 enabled |
W37 |
closed | |
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Disk change detection from FDD connector pin 2 disabled |
W37 |
open | |
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Disk change detection from FDD connector pin 34 enabled |
W38 |
closed | |
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Disk change detection from FDD connector pin 34 disabled |
W38 |
open | |
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Clear disk change signal disabled |
W39 |
open | |
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Clear disk change signal enabled |
W39/pins 1 & 2 |
closed | |
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Note: Drive select 1 & 2 refer to the drive select jumper setting on the drive itself and should be set to 1 & 2 respectively. When W39/pins 1 & 2 closed drive select 4 must not be used. Jumpers W15, W16, W17, W18, W37, W38, W39 refer to flexible disk drives and apply only to models 7200 & 7400. | |||
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SCSI ADDRESS | ||||
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SCSI ID |
W1 |
W2 |
W3 | |
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0 |
open |
open |
open | |
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1 |
closed |
open |
open | |
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2 |
open |
closed |
open | |
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3 |
closed |
closed |
open | |
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4 |
open |
open |
closed | |
|
5 |
closed |
open |
closed | |
|
6 |
open |
closed |
close | |
|
7 |
closed |
closed |
closed | |