>> NetBSD 4 kernel from today's sources on a Motorola Starmax:
>> 
>> ofb0 at pci0 dev 17 function 0: ATI Technologies Mach64 VT
>> trap: pid 0.1 (swapper): kernel PGM trap @ 0 (SRR1=0x81032)
>> panic: trap
>> Begin traceback...
>> 0x005977d0: at trap+0x124
>> 0x00597850: kernel PGM trap by 0x0: srr1=0x81032
>>             r1=0x597910 cr=0x39a33e59 xer=0xe000be6f ctr=0
>> 0x00597910: at vcons_init_screen+0xf0
>> 0x00597940: at ofbattach+0x160
>
> Serial console?

Yes. I tried commenting out all framebuffer and ws entries, and the kernel 
wouldn't compile. I tried using the older "wsdisplay0 at ofb? console ?" 
with machfb* and got the same panic.

On this machine I don't even have the option of setting up or using a 
display - I found the machine in the trash in NYC many years ago, and the 
VRAM DIMM was missing. A regression which would prevent headless Macs from 
running BSD would affect a number of other machines I run, too.

John