🚀 go-pugleaf

In article <1992Nov15.041549.154@weyrich.UUCP> uunet.uu.net!weyrich!orville writes:
>I just got 16 meg of SIMMs from someone on the net and they don't work
>for me. Before I complain, I would like to be sure that I have my facts
>straight.
...
>The old 1 MB SIMMs had 3 chips ( HY514400J-70 * 2 and HY531000J-70 * 1 ).
>The new 4 MB SIMMs that I bought on the net have HY5141000J-70 * 8 chips.
>
>When I installed the new SIMMs, my AMI bios complained of parity errors
>in the first 64KB. So I thought to myself, "I bet these 4 MB SIMMs don't
>have parity, since they only have 8 chips, all the same."

Yep.  8-chip SIMMs don't have parity.

...
>******* Even if OS/2 does run, am I asking for trouble running with parity
>disabled? It is my understanding that some other computers, e.g. Macs,
>never run with parity. ******

It can be a problem, since you won't be able to detect bad RAM.  OS/2
(and Unix) push RAM much harder than DOS or Windows, so marginal
memory is more likely to cause problems under those systems.  Without
parity checking, things will just go wrong on you instead of trapping
and halting the system

BTW, only the older Macs worked without parity.  The newer (and
faster) models use parity-checked RAM.

>I really would appreciate someone giving me prompt advice on this matter
>so that I can get back to the person who sold me the RAM (when I bought
>it, I specified that it was 4Mbit*9 -- I am not sure that is what I was sent).

Exchange those SIMMS immediately and turn your parity checking on.


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