Which chip(s) is(are) bad?

[Steve Wampler]

My 3b1 has been suffering from an intermittent parity error ever since
I added a 1.5Meg combo card (2Meg on the motherboard).  I finally was
able to record some of the errors in unix.log (normally the system just
crashed).  Could some kind soul tell me *exactly* which chip(s) are
involved?  I wouldn't object to an explanation on how to read the
address (what does *hpte mean?) given in the error message, nor an
explanation on how the chips correspond to memory addresses.  I know
this was posted a while back, but I never thought *my machine* would
need it.

My eternal gratitude.

Herewith, the error messages:

NMI (parity error) at 0x2FF2E6 (*hpte: 0xE24D) Tue Aug  8 17:25:24 1989
NMI (parity error) at 0x2FF2E6 (*hpte: 0xE24D) Tue Aug  8 17:25:25 1989
NMI (parity error) at 0x81000 (*hpte: 0x4251) Tue Aug  8 18:00:01 1989
NMI (parity error) at 0x2FF2E6 (*hpte: 0xE24B) Fri Aug 11 04:25:27 1989
NMI (parity error) at 0x2FF2E6 (*hpte: 0xC24B) Fri Aug 11 04:25:29 1989
NMI (parity error) at 0x301004 (*hpte: 0xC22F) Fri Aug 11 05:26:30 1989
NMI (parity error) at 0x301004 (*hpte: 0xC22F) Fri Aug 11 05:26:30 1989
NMI (parity error) at 0x81000 (*hpte: 0x4238) Fri Aug 11 06:04:45 1989

-- 
	Steve Wampler
	{....!arizona!naucse!sbw}