>    tinkerbell# ./netscape 
   >    ./netscape: Exec format error. Wrong Architecture.
   > 
   > what do ktrace/kdump say?  that looks like you're missing EXEC_ELF32
   > or /emul/svr4/usr/lib/ld.so or something..
   
   got that sorted out, /emul was missing some libs including ld.so
   (though I'm not sure why, given it came direct from a NetBSD/sparc box
   that I'd run SunOS5 binaries on in the past)

compat_svr4 looks in /emul/svr4 and compat_svr4_32 looks in /emul/svr4_32
even though they can be identical (and one can be a symlink to the other).
perhaps you were missing one?
   
   tinkerbell# /usr/local/netscape-4.08/netscape
   res_init: socket: Protocol not supported
   Error: Can't open display: grunta:0.0
   tinkerbell# /usr/local/netscape-4.75/netscape
   res_init: socket: Protocol not supported
   Error: Can't open display: grunta:0.0
   
   and from the kernel:
   
   Alignment error: dsfsr=00000000:00800005 dsfar=0:fffffff7 isfsr=00000000:00000000 pc=1000a668
   Alignment error: pid=10005 comm=netscape dsfsr=00000000:00800005 dsfar=0:fffffff7 isfsr=00000000:00000000 pc=1000a668

"what does ktrace/kdump say?"
   
   I haven't yet attempted the SunOS4 version (and was hoping I wouldn't
   have to) :-)


abs tells us that the sunos4 version works!


.mrg.