LARK ASSOCIATES, INC.

LRK-330/331

Data bus:

16-bit ISA

Size:

Three-quarter length, full-height card

Hard drive supported:

Two ESDI drives

Floppy drives supported:

Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

34-pin cable connector - floppy drive

J1

20-pin data cable connector- drive 1

J3

20-pin data cable connector- drive 0

J4

34-pin control cable connector-hard drive

J5

4-pin connector - drive active LED

J6

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Primary hard drive address is 1F0h-1F7h

Primary floppy drive address is 370h-3F7h

W1

open

»

Secondary hard drive address is 170h-177h

Secondary floppy drive address is 370h-377h

W1

closed

»

Floppy drive is single speed

W2

open

 

Floppy drive is dual speed

W2

closed

»

Interrupt delay disabled

W3

open

 

Interrupt delay enabled

W3

closed

USER CONFIGURABLE SETTINGS (CONTINUED)

Function

Location

Setting

»

Factory configured - do not alter

W4

N/A

»

IDE(AT) IRQ 14 select

W9

closed

 

IDE(AT) IRQ 15 select

W10

closed

»

Floppy drive interface enabled

W11

open

 

Floppy drive interface disabled

W11

closed

Note: W12 is unidentified

BIOS ADDRESS SELECTION

Address

W5

W6

W7

W8

»

C800h

closed

open

open

open

 

CC00h

open

closed

open

open

 

D000h

open

open

closed

open

 

D400h

open

open

open

closed

 

Disabled

open

open

open

open

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