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I was able to find only this sentence taken from the Pentium manual
"To determine whether an FPU or NPX is present in a system, applications can write to the FPU/
NPX status and control registers using the FNINIT instruction and then verify the correct values
are read back using the FNSTENV instruction"
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I have found what does that abbreviation stand for.NPX is "Numeric Processor Extension". I provide also link to the pdf with further explanation (google search) : http://www.google.pl/url?sa=t&rct=j&q=intel%20287%20math%20coprocessors%20(npx%20chips)&source=web&cd=5&cad=rja&ved=0CEwQFjAE&url=http%3A%2F%2Fdatasheets.chipdb.org%2FIntel%2Fx86%2F287%2Fdatashts%2F210920-008.pdf&ei=C5MUUbSNCqOmigLyj4GoCw&usg=AFQjCNFZs_XanuFrB4CuAT4Z8dcqYBI4iger
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Sorry for the off topic, but my posts are still queued for the admin approval.
I have found the exact meaning of the NPX abbreviation "Numeric Processor Extension". I also pasted a short excerpt from the Intel 287 coprocessor.I also posted the google search link , but my post is queued for approval.
"80286 .... The 80287 Numeric Processor Extension (NPX) pro- ... 287 Speed CLK Speed "
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