2-7
Host Adapter Configuration
AHA-1510A/20A Series User’s Guide
Stock Number: 510400-00, Rev. C
Page: 2-7
Print Spec Number: 491842-00
Current Date: 11/18/94
ECN Date: 11/29/94
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Jumper Block J9 (AHA-1520A/1522A)
Pin Pair
Description
I
2,
I
1,
I
0,
I
9
Set host adapter IRQ channel
IRQ 12 = jumper
I
2
IRQ 11
✱
= jumper
I
1
IRQ 10 = jumper
I
0
IRQ 9 = jumper
I
9 (not recommended
with
Windows
3.x)
You
must
also set the corresponding IC pin
pairs on jumper block J6.
AL
Set port address
340h
✱
= no jumper
140h = jumper (extra jumper provided)
The host adapter BIOS supports booting only
for the default port address of 340h.
J6, J4
Set BIOS address location
BE
Enable/disable host adapter BIOS
Host adapter BIOS disabled = no jumper
Host adapter BIOS enabled
✱
= jumper
✱
Default setting
Default Setting
I
2
I
1
I
0
I
9 AL J6 J4 BE
= C8000h-
J6 J4
= CC000h-
J6 J4
= D8000h-
J6 J4
= DC000h-
J6 J4
CBFFFh
CFFFFh
DBFFFh
DFFFFh
✱
