My Alpha had an Unexpected Machine Check for the first time
today... I was burning a CD with cdrecord and I had just ssh'd
into the machine when the panic occured.  On the console I
found the following (approx):

Unexpected Machine Check
	mces	= 0x1
	vector	= 0x660
	param	= 0xfffffc0000006000
	pc	= 0xfffffc0000302c20
	ra	= 0xfffffc0000302bfc
	curproc	= 0x0

BTW this is an AlphaStation 200 4/233 running NetBSD 1.5

So I rebooted and continued using the machine for a while,
then while burning another CD and using amp (to convert mp3's
to wav's) it suffered another machine check (approx):

Unexpected Machine Check
	mces	= 0x1
	vector	= 0x660
	param	= 0xfffffc0000006000
	pc	= 0xfffffc0000302c20
	ra	= 0xfffffc0007372f10
	curproc	= 0x0
		pid = 362, comm = amp

Is this indicative of bad memory?  How would I go about
finding out what these machine checks mean?

Maybe my reliability problems burning CDs and these
machine checks are related?  I think I had better stop
trying to burn CDs until I get this sorted out... I've
destroyed 5 today.

Thanks,
Nick Maniscalco