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ST22M, ST22R

SEAGATE TECHNOLOGY INC.

ST22M, ST22R

Data bus: 16-bit, ISA

Size: Half-length, full-height card

Hard drives supported: ST22M: Two MFM ST506/412 drives

ST22R: Two RLL ST412 drives

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

CONNECTIONS

Function

Location

34-pin control cable connector- floppy drive

J1

34-pin control cable connector-hard drive

J2

20-pin data cable connector-drive 0

J3

20-pin data cable connector-drive 1

J4

4-pin connector-drive active LED

J5

5-pin connector-DC power

J6

USER CONFIGURABLE SETTINGS

Function

Location

Setting

BIOS enabled

JP3

open

 

BIOS disabled

JP3

closed

Floppy drive enabled

JP4

closed

 

Floppy drive disabled

JP4

open

I/O AND BIOS ADDRESS

HD Port Address

FD Port Address

BIOS Address

JP1

JP2

1F0-1F7, 3FF-3F7

3F0-3F5, 3F7

C800-CBFF

open

open

 

1F0-1F7, 3F6-3F7

3F0-3F5, 3F7

CC00-CFFF

open

closed

 

170-177, 376-377

370-375, 377

D800-DBFF

closed

open

 

170-177, 376-377

370-375, 377

DC00-DFFF

closed

closed

DRIVE PARAMETERS SUPPORTED BY THE ST22M

Capacity

Heads

Cylinders

SPT

21.4

4

615

17

32.1

6

615

17

42.5

5

977

17

42.8

6

820

17

44.5

5

1024

17

80.2

9

1024

17

DRIVE PARAMETERS SUPPORTED BY THE ST22R

Capacity

Heads

Cylinders

SPT

21.1

2

667

31

32.7

4

615

26

42.9

4

667

31

49.1

6

615

26

65.5

6

820

26

122.7

9

1024

26