I think it is mostly 486 compatible, but if the packages were compiled for 386 , then they would be all compatible.
tinycore works, and xworks, i tried xvesa, xvesa 7.1 xorg and xfbdev ,
xorg is the slowest , xvesa is about twice as fast , and xfbdev is the fastest on my machine, i wrote a simple
graphics bench to measure , but it only confirmed what my eyes already told me , xfbdev is fastest for my machine.
BUT there is a ACCELERATED sys driver, i downloaded the tcz, it failed exactly like the article i linked to, so i suppose
their patch would fix the accelerated driver.
but mongoose , gcc , sylpheed , etc must be compiled to 586 + or use 486 instructions not present on this SOC because
they definatly do give me a "illegal instruction" error.
if someone could try to fix the accelerated sis driver i could test it, it would be appreciated
BTW heres my controlpanel/system stats data for my CPU
processor : 0
vendor_id : SiS SiS SiS
cpu family : 5
model : 0
model name : 05/00
stepping : 5
cpu MHz : 200.033
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu tsc cx8 mmx up
bogomips : 400.73
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management: