I installed 8GB into an i386 system and rant 1.6.1 on it.  The dmesg looks 
like this:

NetBSD 1.6.1 (VAULTS) #0: Mon Apr 28 10:52:43 EDT 2003
    door@greenroom.givex.com:/usr/src/sys/arch/i386/compile/VAULTS
cpu0: Intel Pentium 4 (686-class), 2399.45 MHz
cpu0: D-cache 8 KB 64b/line 4-way
cpu0: L2 cache 512 KB 64b/line 8-way
cpu0: features 
ffffffffbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR
>
cpu0: features ffffffffbfebfbff<PGE,MCA,CMOV,FGPAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features ffffffffbfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,B31>
total memory = 3967 MB
avail memory = 3684 MB
using 6144 buffers containing 198 MB of memory

Can NetBSD use the whole 8GB?

-- 
D'Arcy J.M. Cain <darcy@netbsd.org>
http://www.NetBSD.org/