Chapter 2 Hardware Installation 13
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)
