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 supported: Up to seven SCSI devices Floppy drives supported: Two 360KB, 720KB, 1.2MB or 1.44MB (AHA-1542B) None (AHA-1540B, HA-101S) [Image] 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 2-4 open » 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: »í 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.