SUMMARY: SunOS 4.1.4, sun4m arch and memory

From: Harry Ford (
Date: Wed Feb 10 1999 - 17:14:21 CST

Looks like it's one of those inexplicable things.. got only a couple
responces -- one person said that Sun reserves a portion of memory for

no other sun OS does this -- loaded solaris on the same machine with
accurate reporting.

Our SBUS card turned out to be burnt...

Ya Got Me,

Harry Ford wrote:
> this is strange, but I'm sure there's a simple explanation:
> running SunOS 4.1.4 on a Sparc 5/sun4m architecture, we have four 32 meg
> chips in the machine (128M). The OS detects about 3-400K LESS memory
> than it should. When I boot the same machine in Solaris 2.6 off a
> cdrom, the OS recognizes all 128megs.
> We even tried it with only one chip in there.
> and we even tried it on two different machines with the same
> architecture.
> we're trying to figure out if memory problems are at the root of a
> problem we're having with installing an SBUS serial expander. (see
> previous message :)
> what's going on?
> I'd greatly appreciate any help. and will, of course, summarize.
> -Harry

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