Hal,
	Your suggestion is more or less what I did.

I'm trying another tack now: start with GENERIC, add the options I 
want (test), then begin to pare back. My attempt to  pare back the 
PCI bus resulted in:

cc  -O2 -Werror -Wall -Wstrict-prototypes -Wmissing-prototypes 
-Wpointer-arith -Wno-main -mno-fp-regs -I. -I/sys/arch -I/sys 
-nostdinc -DDIAGNOSTIC -DLKM -DMAXUSERS=32 -D_KERNEL -Dalpha  -c 
/sys/arch/alpha/pci/pci_2100_a50.c
cc1: warnings being treated as errors
/sys/arch/alpha/pci/pci_2100_a50.c: In function `pci_2100_a50_pickintr':
/sys/arch/alpha/pci/pci_2100_a50.c:72: warning: unused variable `iot'
*** Error code 1

Stop.

This is because the "sio" ISA/PCI driver is commented out, and 
apparently the "2100" series machines expect at least one sio.

Next, I'll try paring down the ISA/EISA stuff.

	Erik <fair@clock.org>