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OMTI 5510, OMTI 6510

SCIENTIFIC MICRO SYSTEMS

OMTI 5510, OMTI 6510

Data bus: 8-bit, ISA/AT

Size: Half-length, full-height card

Hard drives supported: OMTI 5510: Two MFM ST506/412 drives

OMTI 6510: Two RLL ESDI drives

Floppy drives supported: None

Maximum Hds/Cyls: 16 heads and 2048

Interleave 1:1


Note: Pin 1 on cable connectors is shown for the 5510.

For the 6510, pin orientation is opposite, with pin 1 located in the upper left corner.

CONNECTIONS

Function

Location

34-pin control cable connector-hard drive

J2

20-pin data cable connector-drive 0

J3

20-pin data cable connector-drive 1

J4

USER CONFIGURABLE SETTINGS

Function

Location

Setting

BIOS enabled

W7

open

 

BIOS disabled

W7

closed

BIOS address is C8000h

W8

open

 

BIOS address is CA000h

W8

closed

Drive 0 soft sectored (5510 only)

W11

open

 

Drive 0 hard sectored (5510 only)

W11

closed

Drive 1 soft sectored (5510 only)

W14

open

 

Drive 1 hard sectored (5510 only)

W14

closed

I/O PORT ADDRESS

Address

Jumper W5

Jumper W6

320h

open

open

 

324h

closed

open

 

328h

open

closed

 

32Ch

closed

closed

SECTOR CONFIGURATION JUMPERS

Bytes per Sector

SPT

Jumper W9

Jumper W10

 

512

18

open

open

 

256

32

closed

open

512

17

open

closed

 

1024

9

closed

closed

DRIVE CONFIGURATION

Drive

Drive 0

Drive 1

 

Type

Jumper W12

Jumper W13

Jumper W15

Jumper W16

Fixed

open

open

open

open

 

Reserved

closed

open

closed

open

 

Reserved

open

closed

open

closed

 

Removable

closed

closed

closed

closed

DRIVE TYPE CONFIGURATION

DRIVE 1

DRIVE 0

BIOS #1002411

Jumepr W1

Jumper W2

Jumper W3

Jumper W4

Cyl.

Hds.

Precomp

closed

closed

closed

closed

2

612

400

open

closed

open

closed

2

612

128

closed

open

closed

open

6

306

128

open

open

open

open

4

306

128

DRIVE CONFIGURATION JUMPERS - BIOS #1002450, #-2451, -#-2302 & #-2570,

W1

W2

W3

W4

HDS

CYLS

WPC

closed

closed

closed

closed

15

918

none

closed

closed

closed

open

4

640

256

closed

closed

open

closed

5

645

320

closed

closed

open

open

4

512

256

closed

open

closed

closed

7

987

none

closed

open

closed

open

2

612

400

closed

open

open

closed

7

634

320

closed

open

open

open

6

306

128

open

closed

closed

closed

11

918

none

open

closed

closed

open

8

512

256

open

closed

open

closed

11

754

none

open

closed

open

open

4

612

256

open

open

closed

closed

5

697

256

open

open

closed

open

2

612

128

open

open

open

closed

6

640

256

open

open

open

open

4

306

128

DRIVE CONFIGURATION JUMPERS - BIOS #1002452

W1

W2

W3

W4

HDS.

CYLS.

WPC

closed

closed

closed

closed

3

1024

512

open

closed

closed

closed

5

1024

512

closed

closed

open

closed

7

1024

512

open

closed

open

closed

8

1024

512

closed

open

closed

closed

2

612

128

open

open

closed

closed

4

612

128

closed

open

open

closed

2

615

128

open

open

open

closed

4

615

128

closed

closed

closed

open

4

512

256

open

closed

closed

open

6

512

256

closed

closed

open

open

8

512

256

open

closed

open

open

3

697

128

open

open

closed

open

9

925

128

closed

open

closed

open

5

697

128

closed

open

open

open

6

306

128

open

open

open

open

4

306

128

DRIVE CONFIGURATION JUMPERS - BIOS #1002571

W1

W2

W3

W4

HDS.

CYLS.

WPC

closed

closed

closed

closed

8

1024

none

open

closed

closed

closed

4

612

none

closed

open

closed

closed

6

615

none

open

open

closed

closed

4

616

none

closed

closed

open

closed

7

987

none

open

closed

open

closed

7

1166

none

closed

open

open

closed

11

1224

none

open

open

open

closed

15

1224

none

closed

closed

closed

open

4

820

none

open

closed

closed

open

6

820

none

closed

open

closed

open

5

1024

none

open

open

closed

open

9

1024

none

closed

closed

open

open

5

830

none

open

closed

open

open

7

830

none

closed

open

open

open

10

830

none

open

open

open

open

4

615

none

DRIVE CONFIGURATION JUMPERS - BIOS #1002312

W1

W2

W3

W4

Hds.

Cyls. (RWC)

Step Rate

open

open

open

open

4

615

25 m sec

open

open

open

closed

5

987

10 m sec

open

open

closed

open

4

612

25 m sec

open

open

closed

closed

8

640

25 m sec

open

closed

open

open

4

306 (128)

25 m sec

open

closed

open

closed

8

612

25 m sec

open

closed

closed

open

10

830

10 m sec

open

closed

closed

closed

6

640

25 m sec

closed

open

open

open

4

306

25 m sec

closed

open

open

closed

7

830

10 m sec

closed

open

closed

open

4

612 (128)

25 m sec

closed

open

closed

closed

15

918

10 m sec

closed

closed

open

open

2

615

25 m sec

closed

closed

open

closed

5

980 (700)

25 m sec

closed

closed

closed

open

8

1024

10 m sec

closed

closed

closed

closed

4

640

25 m sec

MISCELLANEOUS TECHNICAL NOTES

W1 through W4 are used to configure the drive type. To support most of the drives on the market, there have been several different BIOS's offered. The different BIOS drive type tables are listed above with the proper jumper settings.