In SX Microcontrollers, SX/B Compiler and SX-Key Tool, dog8spam wrote:

What I am trying to do is copy a single bit into a variable through IND.  I have run into a brick wall and am hoping I'm wrong about something here.
 

Here FSR is changed when temp is accessed, changing FSR to temp before currentX can be written to.

 

mov fsr,currentX
mov w,temp
and w,#%00000001

snz

setb   IND.0

sz

clrb   IND.0

 

Try to change FSR after accesing temp changes w.

 

mov w,temp
mov fsr,currentX

and w,#%00000001

snz

setb   IND.0

sz

clrb   IND.0

 

Try to change FSR after w is accessed messes up the zero flag.

 


mov w,temp
and w,#%00000001

mov fsr,currentX

snz

setb   IND.0

sz

clrb   IND.0

 

So far as I can tell there is no way this code will work.  I'm hoping some of my logic here is flawed or otherwise it will be back to the drawing board for me.

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