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AHA-1540B, AHA-1542B

(also sold as the Maynard HA-101S)

Data bus: 16-bit, ISA
Size: Three-quarter length, full-height card
Hard drives supported: Up to seven SCSI devices
Floppy drives supported: Two 360KB, 720KB, 1.2MB or 1.44MB (AHA-1542B)
None (AHA-1540B, HA-101S)

CONNECTIONS
Function Location
34-pin data cable connector-floppy drive CN1
50-pin SCSI connector-internal CN2
50-pin SCSI connector-external CN3
4-pin connector-drive active LED CN4

 
SCSI ADDRESS
Select J5/jumper 4 J5/jumper 5 J5/jumper 6
7 open open open
     6 closed open open
     5 open closed open
     4 closed closed open
     3 open open closed
     2 closed open closed
     1 open closed closed
     0 closed closed closed

 
USER CONFIGURABLE SETTINGS
Function Location Setting
SCSI synchronous negotiation disabled J5/jumper 1 open
     SCSI synchronous negotiation enabled J5/jumper 1 closed
Normal operation J5/jumper 2 open
     Self diagnostics enabled J5/jumper 2 closed
SCSI parity check enabled J5/jumper 3 open
     SCSI parity check disabled J5/jumper 3 closed
BIOS enabled J6/jumper 1 closed
     BIOS disabled J6/jumper 1 open
Not used J6/jumpers 2-4 open
Auto sense enabled J6/jumper 5 open
     Auto sense disable J6/jumper 5 closed
Floppy drive port address 3F0-3F7h J7/jumper 1 open
     Floppy drive port address 370-377h J7/jumper 1 closed
Floppy drive enabled J8/jumper 1 closed
     Floppy drive disabled J8/jumper 1 open
Floppy drive DMA Request is DREQ2 J8/jumper 2 closed
     Floppy drive DMA Request is DREQ3 J8/jumper 3 closed
Floppy drive DMA Acknowledge Is DACK2 J8/jumper 4 closed
     Floppy drive DMA Acknowledge is DACK3 J8/jumper 5 closed
Floppy drive Interrupt is IRQ6 J8/jumper 6 closed
     Floppy drive Interrupt is IRQ10 J8/jumper 7 closed
Floppy drive dual speed disabled J8/jumper 8 open
     Floppy drive dual speed enabled J8/jumper 8 closed
AT Bus DMA Request is DREQ5 J9/jumper 2 closed
     AT Bus DMA Request is DREQ0 J9/jumper 1 closed
     AT Bus DMA Request is DREQ6 J9/jumper 3 closed
     AT Bus DMA Request is DREQ7 J9/jumper 4 closed
     AT Bus DMA Acknowledge is DACK0 J9/jumper 5 closed
AT Bus DMA Acknowledge is DACK5 J9/jumper 6 closed
     AT Bus DMA Acknowledge is DACK6 J9/jumper 7 closed
     AT Bus DMA Acknowledge is DACK7 J9/jumper 8 closed
     Hard drive Interrupt is IRQ9 J9/jumper 9 closed
     Hard drive Interrupt is IRQ10 J9/jumper 10 closed
Hard drive Interrupt is IRQ11 J9/jumper 11 closed
     Hard drive Interrupt is IRQ12 J9/jumper 12 closed
     Hard drive Interrupt is IRQ14 J9/jumper 13 closed
     Hard drive Interrupt is IRQ15 J9/jumper 14 closed

 
DMA CHANNEL
DRQ J5/jumper 7 J5/jumper 8
5 open closed
     6 closed open
     7 open open
     0 closed closed

 
INTERRUPT REQUEST
IRQ J5/jumper 9 J5/jumper 10 J5/jumper 11
     9 open open open
     10 closed open open
11 open closed open
     12 closed closed open
     14 open open closed
     15 closed open closed

 
DMA TRANSFER RATE
Speed J5/jumper 12 J5/jumper 13
     5.0Mb/s open open
5.7Mb/s closed open
     6.7Mb/s open closed
     8.0Mb/s closed closed

 
I/O PORT ADDRESS
Address J7/jumper 2 J7/jumper 3 J7/jumper 4
*      334h open open open
    330h closed open open
         234h open closed open
         230h closed closed open
         134h open open closed
         130h closed open closed
Not used closed closed closed
Note: *  denotes default for 1540BS11/1542BS11

 
BUS WAIT STATE
Wait Time J7/jumper 5 J7/jumper 6
Disable open open
     100nsec closed open
     200nsec open closed
     300nsec closed closed

 
MISCELLANEOUS TECHNICAL NOTE
Note:Manufacturer documentation does not specify possible BIOS memory addresses, but a selection of DC00:6 has been recommended by some card users.

 
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