ahd man page on OpenBSD

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AHD(4)			  OpenBSD Programmer's Manual			AHD(4)

     ahd - Adaptec PCI/PCI-X AIC79xx-based Ultra320 SCSI interface

     ahd* at pci?
     scsibus* at ahd?

     ahd provides access to the SCSI bus(es) connected to Adaptec AIC79xx host
     adapter chips.

     ahd supports narrow and wide buses; synchronous and asynchronous
     operation; fast, ultra, ultra2, ultra160, and ultra320 (packetized)
     transfers; tagged queuing and 512 SCBs.

     ahd does not support target mode operation.

     The ahd driver supports the following:

	   o   Adaptec AIC7901 host adapter chip
	   o   Adaptec AIC7901A host adapter chip
	   o   Adaptec AIC7902 host adapter chip
	   o   Adaptec 29320 host adapter
	   o   Adaptec 39320 host adapter
	   o   Many motherboards with on-board SCSI support

     To compile in debugging code:

	   option AHD_DEBUG option AHD_DEBUG_OPTS=<bitmask of options>

     The AHD_DEBUG_OPTS option is used to control which diagnostic messages
     are printed to the console when AHD_DEBUG is enabled.  Logically OR the
     following bits together:

	   Value    Function
	   0x0001   Show miscellaneous information
	   0x0002   Show sense data
	   0x0004   Show Serial EEPROM contents
	   0x0008   Show bus termination settings
	   0x0010   Show host memory usage
	   0x0020   Show SCSI protocol messages
	   0x0040   Show mode pointer of the chip register window
	   0x0080   Show selection timeouts
	   0x0100   Show FIFO usage messages
	   0x0200   Show Queue Full status
	   0x0400   Show SCB queue status
	   0x0800   Show inbound packet information
	   0x1000   Show S/G list information
	   0x2000   Enable extra diagnostic code in the firmware

     Per target configuration performed in the SCSI-Select menu, accessible at
     boot, is honored by this driver.  This includes synchronous/asynchronous
     transfers, maximum synchronous negotiation rate, wide transfers,
     disconnection, and the host adapters SCSI ID.

     ahc(4), cd(4), ch(4), intro(4), pci(4), scsi(4), sd(4), st(4), uk(4)

     The ahd driver was ported from FreeBSD 4.7 and first appeared in
     OpenBSD 3.6.

     The ahd driver, the AIC7xxx sequencer-code assembler, and the firmware
     running on the aic79xx chips was written by Justin T. Gibbs.

     OpenBSD port by Milos Urbanek, Kenneth R. Westerback & Marco Peereboom.

OpenBSD 4.9			January 3, 2010			   OpenBSD 4.9

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