emulators/simh, ethernet, and 64 bit

[John Klos <john%ziaspace.com@localhost>]

Hi,

I've been trying to get simh, recently updated to 3.8.0, to work with 
networking support on 64 bit systems. On 32 bit (i386, PowerPC, NetBSD 4, 
NetBSD current, Mac OS X), ethernet works fine, but on 64 bit (amd64, 
PowerPC, NetBSD 4 and current, and Mac OS X), ethernet doesn't work. It 
compiled, attaches, and the host OS (NetBSD on VAX) configures the 
interface, but no traffic passes. No packets ever reach the wire. However, 
packets do get to the emulator, as one can see from tcpdump.

Does anyone have any idea what about 64 bitness might be breaking ethernet 
support?

Thanks,
John Klos