PIC High operator

[HerbertMunch]

Could someone please explain what the High operator does?

many thanks

 

[philba]

It gives you the high byte of the assemble time evaluated expression.

 

[HerbertMunch]

?
Sorry I still dont understand!
When used on a table construct what would it return?

Thanks

 

[Gayan Soyza]

?
When used on a table construct what would it return?
Thanks

You mean a DATA LOOKUP table?

When a CALL instruction occurred ex: (call TABLE) it writes down the next line in the STACK memory & going to TABLE read (where the Table located at). After getting Table value & returning to the previous saved value in the stack by the use of program counter.

 

[philba]

HIGH isn't code that gets executed. It gives you the top byte of a constant expression.

; assume all that init code happens
movlw    HIGH foo      ; puts 4 into W

; later on in the source code
ORG 400
foo    dt  "abc"

Note that HIGH foo evaluates to a constant,

 

[HerbertMunch]

HIGH isn't code that gets executed. It gives you the top byte of a constant expression.

; assume all that init code happens
movlw    HIGH foo      ; puts 4 into W

; later on in the source code
ORG 400
foo    dt  "abc"

Note that HIGH foo evaluates to a constant,

Many thanks mate, you put it in a way that I could understand!