How to express hi/lo byte of a label in crasm

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I am trying to move my project from xa (which I found rather buggy) to crasm, which is the other 6502 assembler that comes with debian.



My project contains a lot of lines like



ldx #<pname
ldy #>pname


where pname is a label where a string may be found. How is that done in crasm? I couldn't find any such thing as < and > in the man page.






assembly 6502







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    up vote
    1
    down vote

    favorite












    I am trying to move my project from xa (which I found rather buggy) to crasm, which is the other 6502 assembler that comes with debian.



    My project contains a lot of lines like



    ldx #<pname
    ldy #>pname


    where pname is a label where a string may be found. How is that done in crasm? I couldn't find any such thing as < and > in the man page.






    assembly 6502







    share|improve this question























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I am trying to move my project from xa (which I found rather buggy) to crasm, which is the other 6502 assembler that comes with debian.



      My project contains a lot of lines like



      ldx #<pname
      ldy #>pname


      where pname is a label where a string may be found. How is that done in crasm? I couldn't find any such thing as < and > in the man page.






      assembly 6502







      share|improve this question













      I am trying to move my project from xa (which I found rather buggy) to crasm, which is the other 6502 assembler that comes with debian.



      My project contains a lot of lines like



      ldx #<pname
      ldy #>pname


      where pname is a label where a string may be found. How is that done in crasm? I couldn't find any such thing as < and > in the man page.






      assembly 6502




      assembly 6502






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 1 hour ago









      Wilson

      9,703544118




      9,703544118




















          2 Answers
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          2
          down vote













          CRASM is .. well ... lets say frugal - and works more or less along a C like expression syntax. And as with C, there are no seperate operators for low/high byte of an address. So



          >label needs to become (label >> 8)



          while



          <label is to be changed to (label & $FF)



          (the last can, AFAIK, be obmitted - but keeping it makes it way more readable)






          share|improve this answer



























            up vote
            2
            down vote













            It doesn't appear that crasm has shorthand for getting the high and low byte of a value. You'll have to do it explicitly with the & and >> operators:



            High byte:



            ldx #pname>>8


            Low byte:



            ldx #pname&255





            share|improve this answer




















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              up vote
              2
              down vote













              CRASM is .. well ... lets say frugal - and works more or less along a C like expression syntax. And as with C, there are no seperate operators for low/high byte of an address. So



              >label needs to become (label >> 8)



              while



              <label is to be changed to (label & $FF)



              (the last can, AFAIK, be obmitted - but keeping it makes it way more readable)






              share|improve this answer
























                up vote
                2
                down vote













                CRASM is .. well ... lets say frugal - and works more or less along a C like expression syntax. And as with C, there are no seperate operators for low/high byte of an address. So



                >label needs to become (label >> 8)



                while



                <label is to be changed to (label & $FF)



                (the last can, AFAIK, be obmitted - but keeping it makes it way more readable)






                share|improve this answer






















                  up vote
                  2
                  down vote










                  up vote
                  2
                  down vote









                  CRASM is .. well ... lets say frugal - and works more or less along a C like expression syntax. And as with C, there are no seperate operators for low/high byte of an address. So



                  >label needs to become (label >> 8)



                  while



                  <label is to be changed to (label & $FF)



                  (the last can, AFAIK, be obmitted - but keeping it makes it way more readable)






                  share|improve this answer












                  CRASM is .. well ... lets say frugal - and works more or less along a C like expression syntax. And as with C, there are no seperate operators for low/high byte of an address. So



                  >label needs to become (label >> 8)



                  while



                  <label is to be changed to (label & $FF)



                  (the last can, AFAIK, be obmitted - but keeping it makes it way more readable)







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 1 hour ago









                  Raffzahn

                  40.8k594168




                  40.8k594168




















                      up vote
                      2
                      down vote













                      It doesn't appear that crasm has shorthand for getting the high and low byte of a value. You'll have to do it explicitly with the & and >> operators:



                      High byte:



                      ldx #pname>>8


                      Low byte:



                      ldx #pname&255





                      share|improve this answer
























                        up vote
                        2
                        down vote













                        It doesn't appear that crasm has shorthand for getting the high and low byte of a value. You'll have to do it explicitly with the & and >> operators:



                        High byte:



                        ldx #pname>>8


                        Low byte:



                        ldx #pname&255





                        share|improve this answer






















                          up vote
                          2
                          down vote










                          up vote
                          2
                          down vote









                          It doesn't appear that crasm has shorthand for getting the high and low byte of a value. You'll have to do it explicitly with the & and >> operators:



                          High byte:



                          ldx #pname>>8


                          Low byte:



                          ldx #pname&255





                          share|improve this answer












                          It doesn't appear that crasm has shorthand for getting the high and low byte of a value. You'll have to do it explicitly with the & and >> operators:



                          High byte:



                          ldx #pname>>8


                          Low byte:



                          ldx #pname&255






                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 1 hour ago









                          George Phillips

                          3,4631421




                          3,4631421



























                               

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