...because we can't all be on the bleeding edge...





OMTI 5520B

SCIENTIFIC MICRO SYSTEMS

OMTI 5520B

Data bus:

8-bit ISA

Size:

Half-length, full-height card

Hard drive supported:

Two MFM 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

Model

Cylinder Nbr.

Head Nbr.

WPC cyl.

W1

W2

W3

W4

CDC 9415-36

697

5

256

open

open

closed

closed

Cynthia 570

987

7

N/A

closed

open

closed

closed

DMA/Ricoh

(10MB removeable)

612

2

400

closed

open

closed

open

Lapine 3522

306

4

128

open

open

open

open

Maxtor XT1140

918

15

N/A

closed

closed

closed

closed

Miniscribe 3012/3212

612

2

128

open

open

closed

open

Miniscribe 3425

612

4

128

open

closed

closed

closed

Microscience HH312

306

4

N/A

closed

closed

open

closed

Quantum Q540

512

8

256

open

closed

closed

open

Rodime 352

306

4

N/A

closed

closed

open

closed

Seagate ST212/412

306

4

128

open

open

open

open

Seagate ST213

612

2

256

closed

open

open

open

Seagate ST225

615

4

256

open

closed

open

open

Seagate ST4026

615

4

300

closed

closed

open

open

Seagate ST4038

733

5

300

closed

open

open

closed

Seagate ST4051

977

5

300

open

closed

open

closed

Vertex V170

987

7

N/A

closed

open

closed

closed

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 jumpers W1

through W4.

WPC is Write Precompensation.

HARD DISK I/O ADDRESS SELECTION

Address

W5

W6

320h

open

open

 

324h

closed

open

 

328h

open

closed

 

32Ch

closed

closed