Adaptec 1520A - AHA Storage Controller Fast SCSI 10 MBps Guida Utente Pagina 26

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2-6
AHA-1510A/20A Series Users 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 con-
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
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