SCIENTIFIC MICRO SYSTEMS, INC.

OMTI 5200 (REV. E), 5204 (REV. B), 5300 (REV. D),

5400 (REV. C)

Data bus:

50-pin SCSI interface

Size:

5.75" x 8"

Hard drive supported:

Up to three ST506/412 MFM drives (5300), up to four ST506/412 MFM drives (5200, 5204, 5400)

Floppy drives supported:

Two 360KB, 720KB (all except 5300) 1.2MB, 1.44MB (5200, 5400)

   

CONNECTIONS

Function

Location

50-pin SCSI interface

J1

34-pin MFM disk control connector

J2

20-pin data cable connector

J3

20-pin data cable connector

J4

34-pin floppy drive connector (not in 5300)

J7

50-pin tape drive connector (5300, 5400)

J8

DC power connector

J10

SCSI ADDRESS

SCSI ID

W0/0

W0/1

W0/2

W0/3

W0/4

W0/5

W0/6

W0/7

»

0

closed

open

open

open

open

open

open

open

»

1

open

closed

open

open

open

open

open

open

»

2

open

open

closed

open

open

open

open

open

»

3

open

open

open

closed

open

open

open

open

»

4

open

open

open

open

closed

open

open

open

»

5

open

open

open

open

open

closed

open

open

»

6

open

open

open

open

open

open

closed

open

»

7

open

open

open

open

open

open

open

closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

SCSI parity enabled

W1/pins 1 & 2

closed

»

SCSI parity disabled

W1/pins 2 & 3

closed

»

QIC--02 (Tape drive) parity enabled (5300 & 5400)

W2/pins 1 & 2

closed

»

QIC--02 (Tape drive) parity disabled (5300 & 5400)

W2/pins 2 & 3

closed

»

LUN 0 supports ST506/412 MFM disk type

W5

open

»

LUN 0 supports flexible disk (5400, 5200, 5204)

W5

closed

»

LUN 0 is reserved (5300)

W5

closed

»

LUN 1 supports ST506/412 MFM disk type

W6

open

»

LUN 1 supports flexible disk (5400, 5200, 5204)

W6

closed

»

LUN 1 is reserved (5300)

W6

closed

»

LUN 2 supports ST506/412 MFM disk type

W7

open

»

LUN 2 supports flexible disk (5400, 5200, 5204)

W7

closed

»

LUN 2 is reserved (5300)

W7

closed

»

LUN 3 supports ST506/412 MFM disk type (5200, 5204)

W8

open

»

LUN 3 supports tape drive (5400, 5300)

W8

open

»

LUN 3 supports flexible disk (5400, 5200, 5204)

W8

closed

»

LUN 3 supports ST506/412 MFM disk type (5300)

W8

closed

»

Motor on signal always enabled (5200, 5204, 5400)

W14

closed

»

Motor on signal enabled by command

W14

open

»

Ready override signal for flexible disk enabled (for drives not supporting Ready signal)

W15

closed

»

Ready override signal for flexible disk disabled (for drives í supporting Ready signal)

W15

open

»

Factory configured - do not alter

W17

N/A

»

Factory configured - do not alter

W18

N/A

SECTOR CONFIGURATION

Bytes/Sector

Sector/Track

W3

W4

»

256

32

closed

open

»

512

17

open

closed

 

512

18

open

open

»

1024

9

closed

closed

MISCELLANEOUS TECHNICAL NOTES

When installing ST506/412 fixed/removable, 2 LUNs are used which limits the number of the remaining LUNs and therefore the number of drives that can be supported.