IPTools.net.ua

CONNECTIONS

Function

Location

34-pin data 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

BIOS ADDRESS

Address

W1/jumper 1

W1/jumper 2

C800h

open

open

D000h

closed

open

D800h

open

closed

D400h

closed

closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

BIOS enabled

W1/jumper 3

closed

BIOS disabled

W1/jumper 3

open

Initial interrupt enabled after reset

W1/jumper 4

closed

Initial interrupt disabled after reset

W1/jumper 4

open

Floppy drive uses standard logic

W1/jumper 5

closed

Floppy drive uses reverse logic

W1/jumper 5

open

Standard AT cable selected

W1/jumper 6

open

IBM cable selected

W1/jumper 6

closed

Normal IRQ timing

W2/jumper 8

open

IRQ delay (40 m

W2/jumper 8

closed

Floppy drive enabled

W2/jumper 9

open

Floppy drive disabled

W2/jumper 9

closed

Auto deselect disabled

W2/jumper 10

open

Auto deselect enabled

W2/jumper 10

closed

Hard drive port address is 1F0-1F7h

W2/jumper 11

closed

Hard drive port address is 170-177h

W2/jumper 11

open

Floppy drive precomp is scaled by data rate: 500KHz=125ns;300KHz=208ns;250KHz=250ns

W3

pins 1 & 2 open

Floppy drive precompensation is 125ns

W3

pins 1 & 2 closed

Single speed floppy drives

W3

pins 3 & 4 open

Dual speed floppy drives

W3

pins 3 & 4 closed

INTERRUPT REQUEST

IRQ

W2/jumper 12

W2/jumper 13

Hard Drive Interrupt Request is IRQ14

open

closed

Hard Drive Interrupt Request is IRQ15

closed

open

MISCELLANEOUS TECHNICAL NOTES

W2/jumpers 1 through 7, and W2/jumpers 14 through 18 are Not used.