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

Hi pjv,

I think I made an error regarding the subtraction. The sx [u]clears[/u] the C for underflow
and sets C when there is no underflow. So the subtract sequence appears right.

But the addition fails


dacValue = $FF00
adcValue = $0100
dacValue + adcValue = $0000 with C set

Using the sxb sequence
add the MSB yields 0 with C set
add the LSB yields 0 with C clear
so the ADDB dacValue_MSB,C leaves C clear

regards peter

PS. Have you seen my latest reply on the IFDEF issue.
I thought you were looking for a macro to autocreate a jumptable.
[url=http://forums.parallax.com/forums/default.aspx?f=7&m=339008&g=339308#m339308]http://forums.parallax.com/forums/default.aspx?f=7&m=339008&g=339308#m339308[/url]

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