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AHA-1520A, AHA1522A

Data bus: 16-bit ISA
Size: Half-length, full-height card
Hard drive supported: Up to seven SCSI devices
Floppy drives supported: None

CONNECTIONS
Function Location
50-pin SCSI connector - external CN1
50-pin SCSI connector - internal CN2
34-pin floppy controller - 1522A only CN3

 
SCSI ID SELECTION
SCSI ID J6/1 J6/2 J6/3
7 closed closed closed
     0 open open open
     1 closed open open
     2 open closed open
     3 closed closed open
     4 open open closed
     5 closed pen closed
     6 open closed closed

 
USER CONFIGURABLE SETTINGS
Function Location Setting
Factory configured - do not alter J5/1 open
INT 19 is re-routed J5/2 closed
     INT 19 is not re-routed J5/2 open
Sync. negotiation enabled J5/5 closed
     Sync. negotiation disabled J5/5 open
Disconnect by target SCSI device enabled J5/6 closed
     Disconnect by target SCSI device disabled J5/6 open
Factory configured - do not alter J5/7 open
Factory configured - do not alter J5/8 open
Factory configured - do not alter J6/6 open
Factory configured - do not alter J6/7 open
SCSI parity check enabled J6/8 open
     SCSI parity check disabled J6/8 closed
Floppy drive enabled (only on 1522A) J7 closed
     Floppy drive disabled (only on 1522A) J7 open
Factory configured - do not alter J8/1-8 open
Adapter I/O address is 340h J9/5 open
     Adapter I/O address is 140h J9/5 closed
Host adapter BIOS enabled J9/8 closed
     Host adapter BIOS disabled J9/8 open
Note: When connecting both external ∓ internal devices to the host adapter - remove terminators

 
MESSAGES AT BOOT-UP
Message J5/3 J5/4
Adapter header open open
     Error messages closed closed
Boot progress report open closed
SCSI device information closed open

 
BIOS ADDRESS SELECTION
Address J9/6 J9/7
DFFFFh closed closed
     CBFFFh open open
     CFFFFh open closed
     DBFFFh closed open

 
INTERRUPT SELECTION
IRQ J6/4 J6/5 J9/1 J9/2 J9/3 J9/4
11 open closed open closed open open
     9 open open open open open closed
     10 closed open open open closed open
     12 closed closed closed open open open

 
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