2-6
AHA-1510A/20A Series User’s Guide
AHA-1510A/20A Series User’s Guide
Stock Number: 510400-00, Rev. C Page: 2-6
Print Spec Number: 491842-00
Current Date: 11/18/94 ECN Date: 11/29/94
Jumper Block J7

The host adapter floppy controller is enabled when the jumper is

installed on jumper block J7.

Caution: If the host adapter floppy controller is

enabled, you must disconnect all other floppy c on-

trollers to avoid system hang.

Jumper Block J8

This jumper block is used only when DMA is enabled on jumper

block J5 pin pair DT.

DMA Channel Set J8
Pin Pairs
Set DMA channel
Channel 0
Channel 5
Channel 6
Channel 7
You must also select the
same
interrupt
channel with the DC pin pairs on jumper
block J6.
D0, D0
D5, D5
D6, D6
DR,DA
= Floppy
Enabled✱= Floppy
Disabled
✱ Default setting
1
DR D6 D5 D0 DA D6 D5 D0
Default Setting