dbercel@toto.UUCP (05/22/87)
To those of you who sent me chip locations, thank you.
Unfortunately, none of you agree with each other. So, let
me make my plea one more time.
My friend has a memory parity error and the chip is in
location: 0480 (hex). From what I've been able to determine,
this chip is in bank zero on the motherboard. That would mean it
was one of the soldered chips. However, I've been told that
the chip is bank five, bank one, and bank zero (expansion).
Is there anyone out there who really knows the chip location?
According to the hardware reference manual the "04" indicates
the 2nd 16K of memory which makes it bank zero. But,
according to the IBM diagnostics the "04" are the eight
high order bits from a 20-bit memory address. This has
now got my tiny little brain completely confused.
HELP.
danielle
--
UUCP: {hplabs,decvax,}!sun!toto!{danielle,dbercel}
COM: dbercel%toto@sun.com
ARPA: dbercel@sun.arpa
/-------------------------------------\
| Toto, I don't think this is Kansas. | -- Danielle Bercel
\-------------------------------------/ Sun Microsystems, Inc.bright@dataio.UUCP (05/26/87)
In article <19522@sun.uucp- dbercel@sun.UUCP (Danielle Bercel, MIS Systems Programming) writes:
-To those of you who sent me chip locations, thank you.
-Unfortunately, none of you agree with each other. So, let
-me make my plea one more time.
-
-My friend has a memory parity error and the chip is in
-location: 0480 (hex). From what I've been able to determine,
-this chip is in bank zero on the motherboard. That would mean it
-was one of the soldered chips. However, I've been told that
-the chip is bank five, bank one, and bank zero (expansion).
-
-Is there anyone out there who really knows the chip location?
-According to the hardware reference manual the "04" indicates
-the 2nd 16K of memory which makes it bank zero. But,
-according to the IBM diagnostics the "04" are the eight
-high order bits from a 20-bit memory address. This has
-now got my tiny little brain completely confused.
There are two ways to determine this:
1. Read the BIOS listing where the memory test is done and
the error message is printed out. I've done this before, and
replaced the right chip the first time.
2. Pull out a memory chip and see how the diagnostic location
changes. A few experiments will make it obvious what the
encoding scheme is.