[Oslib-devel] 066h does not means 32 bits, but toggles

[Paul D. <du...@ho...>]

Looking through x_sw2.nsm (eXtender sources) I see something like this:
		db	066h
		mov 	eax,cr0		; switch to pm
		mov	[ds:_old_CR0],eax ; store old CR0 value
		or 	ax,1
		db	066h
		mov 	cr0,eax

I am very afraid by these db 066h.
First, it seems it was in a 16 bits segment, so by seeing mov cr0,eax in a 
16 bits
segment, the assembler, will, should, automatically insert the toggle prefix 
066h.
But now, when there are two prefix, I don't know if the CPU will toggle back
as if they were no 66h at all, or just ignore the fact that there is more 
than one.

This seems ok to code explicitly the 066h when you explicitly code yourself 
the
instruction, but not to put it before a mov, as then you may be undoing what
the assembler supposed to do.

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