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# ADAPTEC, INC.
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 Up to seven SCSI devices
supported:
Floppy drives Two 360KB, 720KB, 1.2MB or 1.44MB
supported: (AHA-1542B)
None (AHA-1540B, HA-101S)
IMG IMG 1
+------------------------------------------------------------+
| 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 | J5/jumper 1 | open |
| | disabled | | |
|---+-------------------------------+--------------+---------|
| | SCSI synchronous negotiation | J5/jumper 1 | closed |
| | enabled | | |
|---+-------------------------------+--------------+---------|
| » | 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 | open |
| | | 2-4 | |
|---+-------------------------------+--------------+---------|
| » | Auto sense enabled | J6/jumper 5 | open |
|---+-------------------------------+--------------+---------|
| | Auto sense disable | J6/jumper 5 | closed |
|---+-------------------------------+--------------+---------|
| » | Floppy drive port address | J7/jumper 1 | open |
| | 3F0-3F7h | | |
|---+-------------------------------+--------------+---------|
| | Floppy drive port address | J7/jumper 1 | closed |
| | 370-377h | | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive enabled | J8/jumper 1 | closed |
|---+-------------------------------+--------------+---------|
| | Floppy drive disabled | J8/jumper 1 | open |
|---+-------------------------------+--------------+---------|
| » | Floppy drive DMA Request is | J8/jumper 2 | closed |
| | DREQ2 | | |
|---+-------------------------------+--------------+---------|
| | Floppy drive DMA Request is | J8/jumper 3 | closed |
| | DREQ3 | | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive DMA Acknowledge | J8/jumper 4 | closed |
| | Is DACK2 | | |
|---+-------------------------------+--------------+---------|
| | Floppy drive DMA Acknowledge | J8/jumper 5 | closed |
| | is DACK3 | | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive Interrupt is | J8/jumper 6 | closed |
| | IRQ6 | | |
|---+-------------------------------+--------------+---------|
| | Floppy drive Interrupt is | J8/jumper 7 | closed |
| | IRQ10 | | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive dual speed | J8/jumper 8 | open |
| | disabled | | |
|---+-------------------------------+--------------+---------|
| | Floppy drive dual speed | J8/jumper 8 | closed |
| | enabled | | |
|---+-------------------------------+--------------+---------|
| » | 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 | J9/jumper 5 | closed |
| | DACK0 | | |
|---+-------------------------------+--------------+---------|
| » | AT Bus DMA Acknowledge is | J9/jumper 6 | closed |
| | DACK5 | | |
|---+-------------------------------+--------------+---------|
| | AT Bus DMA Acknowledge is | J9/jumper 7 | closed |
| | DACK6 | | |
|---+-------------------------------+--------------+---------|
| | AT Bus DMA Acknowledge is | J9/jumper 8 | closed |
| | DACK7 | | |
|---+-------------------------------+--------------+---------|
| | 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 |
|---------------+--------------+--------------+--------------|
| » | í 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: Ȓ 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. |
+------------------------------------------------------------+