Sorry -- been away from the discussion a bit. Started one in the main 1.11 forum:
pSX emulator - 1.11 Aging Athlon Issue
The basics -- from my own experience, 1.10 works just fine on my Athlon PC in Windows. In the other post, patrickp included a set of early Linux WIP's. The 2nd WIP from the collection worked. 1.11 (Win or Linux) and the later Linux WIP's will crash shortly after being fired up. It won't even get so far as asking me to select my language. Crash information is supplied in the other forum.
Notice that, from those that have chimed in on various forums, Athlon XP's and later are not affected. Only the Athlon Classic and Athlon Thunderbirds. (Basically -- if there's no plus sign or other indicator after the speed number, and if the speed is 1400 or less. Like my Athlon 1200) No disrespect intended ... I realize that psxauthor has claimed that SSE / SSE2 is not a factor here, but the Classic / Thunderbirds had a partical SSE implementation. The XP's were the first to have full SSE implementation. And, for some reason -- 1.11 works on XP's. We're still waiting to hear from anyone who's been able to get 1.11 to work on the older Athlons.
Cheers