64-bit OS'es

Current 64-bit OSes:

IRIX 6.4 on MIPS R10000 w. 64-bit kernel
HP-UX 11.0 on new HP-Convex machines
Digital UNIX on Alpha
IBM's AIX ?

Future 64-bit OS'es

Solaris (>2.6) expected sometime this year
NT (v.?!) expected end 1999 on Intel's Merced

IRIX and Digital UNIX follow LP64 model

Only Longs and Pointers are 64-bit.
Everything else stays the same.

Our port has been based on this LP64 model. Hopefully if the other OSes also follow this model, porting our systems to those OS'es will not prove cumbersome.