ahc no longer attaches?

[Steve Kargl]

It seems that some recent change has caused problems
with ahc devices.  From dmesg I find

ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xb800-0xb8ff mem 0xdeafe000-0xdeafefff irq 16 at device 4.0 on pci3
ahc0: PCI Device 3:4:0 failed I/O mapped test.
ahc0: can't allocate register resources
device_attach: ahc0 attach returned 12

and sa0 is no longer available for backups.

The motherboard is a Tyan K8SD Pro.

-- 
Steve