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AHA(4)		       FreeBSD Kernel Interfaces Manual 		AHA(4)

NAME
     aha -- Adaptec SCSI host adapter driver

SYNOPSIS
     device aha0 at isa? port ? irq ? drq 5
     device scbus0 at aha0

DESCRIPTION
     This driver provides access to the SCSI bus connected to an Adaptec 1510,
     152x, 1535, 154xA, 154xB, 154xC, 154xCF, 154xCP, or 164x host adapter.
     Host adapters supporting a 154x compatible interface, such as some Tekram
     controllers and the Adaptec 174x in 154x emulation mode can also be
     attached with this driver.  For optimum performance, Adaptec 174x con-
     trollers should be configured in enhanced mode and attached via the
     ahb(4) driver.

     One kernel config entry for every card to be attached by the system is
     required.	Specific values for the port address, irq, and drq may be
     specified.  If wildcard values are used, the driver will query the device
     for its current settings and use those.  If the port address is a wild-
     card, the driver consults an internal table of possible port address
     locations and attaches to the first unattached card it finds.  The possi-
     ble port addresses for this card are 0x330, 0x334, 0x230, 0x234, 0x130,
     and 0x134.

SEE ALSO
     ahb(4), ahc(4), cd(4), da(4), sa(4), scsi(4)

AUTHORS
     The aha driver was ported by M. Warner Losh from the bt driver written by
     Justin T. Gibbs.

FreeBSD 4.9		       October 15, 1998 		   FreeBSD 4.9