> 
> 	Is there a test and set instruction available for pentium processor. 
>  
> Harish 
> -----------------------------------------------------------------------------
> 
> Harish Singh Rawat			   E-Mail : harawat@in.oracle.com 
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	Not with that name. Two instructions do it.
	In PeeCee assembler it goes:

	mov	eax,1
	xchg	memaddr,eax

	then jump on the flags. xchg is an atomic operation.

DV