RE: intel-clone CPU's

Andrew James Alan Welty (
Fri, 04 Apr 1997 08:28:33 -0400

>From what I have observed of Intel Clones (5X86 and AMD K5 clones) they
seem to process math as efficently as Pentiums do. I don't know if it's by
design or do they have to be written to some specific manner. For
sake, an AMD K-something, it's equivalant to a 75 Mhz Pentium, seems to
run just
a bit faster than a DX4-100. I don't know, I'm not an expert in MPU
design but
it definately seems odd.


Has anyone else been using deschall with intel clone CPU's? For some
reason the 586-133 linux box here is processing keys at a rate closer to
my 486dx2-66 linux box than my P90 OS/2 computer (and the P90 does about
twice as many keys as the 486). Are there any plans on releasing intel
clone editions of deschall (I'm upgrading to a 686-P200 clone soon), as it
seems strange that the 586 clone should be so much slower than the P90.

I'm running Deschall on an IBM (Cyrix) 686-133mhz, it performs slower then
on an Intel Pentium 120mhz. Though normally this chip will outrun an Intel
166mhz Pentium except in FPU, and Deschall uses 100% integer. I think the
problem comes from the fact that Deschall is optimized for the Intel
and the non-Intel chips use a different internal architecture making the
optimizations different. I've noticed in my case the deschal4 (486) and
deschal5 (Pentium) both run at the same rate.