Timer? input question

[daklein at netzero.net]

 From the 8051 e side, related to deciding whether or not to start or 
continue applying traction control spark retard.

Can anyone explain / confirm / debunk this......

What is the reason for a section of code to do something like this?  I'm 
hypothesizing that it is reading a timer from outside the HC11, and it 
wants to compare whatever is at $14a6 & $1486, without getting interrupted 
and the lda & nop are just for a little delay to read or time to twiddle 
bits or something.  Am I in the ballpark?

di	
ldaA	L14A6
nop	
ldX	L14A6
ldaA	L1486
nop	
cmpX	L1486
ei	
bne	@18

I looked some thru anht.hac for something similar to this, but can't find 
an example of this sort of thing.  Could anyone point me to a sample 
section of code, or any other help about how this might work.

Thanks way in advance,
	Dale

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