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OMTI 5527B

SCIENTIFIC MICRO SYSTEMS

OMTI 5527B

Data bus:

8-bit ISA

Size:

Half-length, full-height card

Hard drive supported:

Two RLL ST-506/412 drives

Floppy drives supported:

None

CONNECTIONS

Function

Location

34-pin control cable connector - hard drive

J1

20-pin data cable connector - drive 1

J2

20-pin data cable connector - drive 2

J3

USER CONFIGURABLE SETTINGS

Function

Location

Setting

BIOS controller enabled

W7

Open

 

BIOS controller disabled

W7

Closed

BIOS controller address is C8000h

W8

Open

 

BIOS controller address is CA000h

W8

Closed

HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1

(BIOS 1002312-R7)

Model

Cylinder Nbr.

Head Nbr.

Step Rate

( m

W1

W2

W3

W4

Lapine Titan (3.5 in.)

615

4

25

Open

Open

Open

Open

Maxtor XT-1085

1024

8

10

Closed

Closed

Closed

Open

Maxtor XT-1140

918

15

10

Closed

Open

Closed

Closed

Miniscribe 3425

612

4

25

Closed

Open

Closed

Open

Microscience HH7156

12

4

25

Open

Open

Closed

Open

NEC D3126 (3.5 in.)

640

8

25

Open

Open

Closed

Closed

NEC 5126

612

4

25

Closed

Open

Closed

Open

Newbury Data Penny

612

8

25

Open

Closed

Open

Closed

Rodime RO352

306

4

25

Closed

Open

Open

Open

Rodime R0204E

640

8

25

Open

Open

Closed

Closed

Seagate ST238

615

4

25

Open

Open

Open

Open

Syquest SQ 319

615

2

25

Closed

Closed

Open

Open

Tandon TM 502

306

4

25

Open

Closed

Open

Open

Tandon TM755

980

5

25

Closed

Closed

Open

Closed

Toshiba MK54FB

830

7

10

Closed

Open

Open

Closed

Toshiba MK56FB

830

10

10

Open

Closed

Closed

Open

Tulin R0202E

640

4

25

Closed

Closed

Closed

Closed

Vertex/Priam V150

987

5

10

Open

Open

Open

Closed

Note: Install jumpers W1 through W4 in a two-drive system only when both drives are the same model

and the model is listed above. If drive model is not listed above, do not install W1 through W4.

The Miniscribe 3425, Tandon TM 502 and Tandon TM755 models listed above are characterized

by Reduce Write Current at cylinder numbers 128, 128, 700 respectively.

HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1

(BIOS 1002571-R10)

Model

Cylinder Nbr.

Head Nbr.

W1

W2

W3

W4

Atasi 3085

1024

8

Closed

Closed

Closed

Closed

Lapine LT300

616

4

Open

Open

Closed

Closed

Microscience HH330

612

4

Open

Closed

Closed

Closed

Microscience HH738

612

4

Open

Closed

Closed

Closed

Miniscribe 3438

615

4

Open

Open

Open

Open

Miniscribe 8438

612

4

Open

Closed

Closed

Closed

Peripheral Tech 357R

615

6

Closed

Open

Closed

Closed

Priam V170

987

7

Closed

Closed

Open

Closed

Priam V185

1166

7

Open

Closed

Open

Closed

Priam 514

1224

11

Closed

Open

Open

Closed

Priam 519

1224

15

Open

Open

Open

Closed

Seagate ST238R

615

4

Open

Open

Open

Open

Seagate ST251R

820

4

Closed

Closed

Closed

Open

Seagate ST277R

820

6

Open

Closed

Closed

Open

Seagate ST4077R

1024

5

Closed

Open

Closed

Open

Seagate ST4144R

1024

9

Closed

Open

Closed

Open

Tobshiba MK53FB

830

5

Closed

Closed

Open

Open

Toshiba MK54FB

830

7

Open

Closed

Open

Open

Toshiba MK56FB

830

10

Closed

Open

Open

Open

Note: Install jumpers W1 through W4 in a two-drive system, only when both drives are the same model

and that model is listed above. If drive model is not listed above, do not install W1 through W4.

HARD DISK I/O ADDRESS SELECTION

Address

W5

W6

320h

Open

Open

 

324h

Closed

Open

 

328h

Open

Closed

 

32Ch

Closed

Closed