btw, this what I get with the 2902 now:

NetBSD 1.4.1 (GENERIC) #0: Mon Aug  9 02:30:53 PDT 1999
    ross@sutekh:/usr/src/sys/arch/alpha/compile/GENERIC
Digital AlphaPC 164 500 MHz
8192 byte page size, 1 processor.
real mem = 134217728 (2531328 reserved for PROM, 131686400 used by NetBSD)
avail mem = 111886336
using 1607 buffers containing 13164544 bytes of memory
mainbus0 (root)
cpu0 at mainbus0: ID 0 (primary), 21164A-2 (pass 2)
cia0 at mainbus0: DECchip 2117x Core Logic Chipset (ALCOR/ALCOR2), pass 3
cia0: extended capabilities: 21<DWEN,BWEN>
cia0: using BWX for PCI config access
pci0 at cia0 bus 0
pci0: i/o enabled, memory enabled
de0 at pci0 dev 5 function 0
de0: interrupting at eb164 irq 2
de0: DEC DE500-BA 21143 [10-100Mb/s] pass 3.0
de0: address 00:00:f8:09:4f:14
de0: enabling 100baseTX port
ahc0 at pci0 dev 6 function 0

unexpected machine check:

    mces    = 0x1
    vector  = 0x660
    param   = 0xfffffc0000006060
    pc      = 0xfffffc00004fb20c
    ra      = 0xfffffc00003012b0
    curproc = 0xfffffc00005f0230
        pid = 0, comm =

panic: machine check
Stopped in  at  Debugger+0x4:   ret     zero,(ra)
db>