Jumper Block JP4 :

This jumper block is used to set IRQ channel. You must also set the corresponding IC jumper on jumper block 5.

Set IRQ 12

= Jumper 12

Close , Others Open

Set IRQ 11 *

= Jumper 11

Close , Others Open

Set IRQ 10

= Jumper 10

Close , Others Open

Set IRQ 9

= Jumper 9

Close , Others Open (Not

 

recommended with Windows 3.x)

(* means default setting)

 

Jumper Block JP5 :

This jumper block provides four functions eight jumper to set the PCM-3420 host adapter configuration , including SCSI ID , IRQ channel , DMA channel , and parity checking.

JP5 Set PCM-3420 host adapter SCSI ID :

ID

SD0

SD1

SD2

0

Close

Close

Close

1

Open

Close

Close

2

Close

Open

Close

3

Open

Open

Close

4

Close

Close

Open

5

Open

Close

Open

6

Close

Open

Open

7 *

Open

Open

Open

(* means default setting)

 

JP5 Set PCM-3420 host adapter IRQ Channel :

IRQ

IC0 IC1

9

Close Close (JP4/IRQ 9 also set close)

Chapter 2 Hardware Installation 13

Page 19
Image 19
Adaptec PC/104, PCM-3420 manual SD0 SD1 SD2