Bob Pearson, director of Sun Microsystems Inc’s Advanced Desktop Systems Group, says the bulk of the unit’s development resources are now geared towards 64-bit system development, with 167MHz, 275 SPECint UltraSparc-I parts due by year-end. Systems should be with users well before the end of next year, Pearson says. Short-term, 100MHz SuperSparc product revisions are due in about six months, as soon as Texas Instruments Inc can get chips to the group. SunSoft promises it won’t break with applications compatibility during the move to a 64-bit version of Solaris, expected to be a gradual process spanning five years or more.