DASM macro parameter problem

[Thomas Jentzsch]

Any idea how to pass variables instead of constant numbers to a macro?

 

E.g. instead of "MACRO 1" I would like to do "MACRO variable". But when I do this outside an expression, inside the macro {1} is converted into the string "variable" and not the content of the variable.

 MAC TEST
Label{1}
   .byte {1}
 ENDM  

variable SET 10
 TEST variable

This works for the .byte instruction, but not for the label. I get "Labelvariable" instead of "Label10".

 

Any ideas?

[SeaGtGruff]

Any idea how to pass variables instead of constant numbers to a macro?

 

E.g. instead of "MACRO 1" I would like to do "MACRO variable". But when I do this outside an expression, inside the macro {1} is converted into the string "variable" and not the content of the variable.

 MAC TEST
Label{1}
   .byte {1}
 ENDM  

variable SET 10
 TEST variable

This works for the .byte instruction, but not for the label. I get "Labelvariable" instead of "Label10".

 

Any ideas?

I have an idea, but you might not like it-- although it's the only thing I could get to work.

 

Define a macro called LABEL, as follows:

 

  MAC LABEL
  if <{1} == 0
Label0
  endif
  if <{1} == 1
Label1
  endif
  if <{1} == 2
Label2
  endif
; etc.
  if <{1} == 10
Label10
  endif
; etc., up to
  if <{1} == 255
Label255
  endif
  ENDM

This assumes that the variable you're going to pass to your macro will be set to a value between 0 and 255.

 

Then you can call the LABEL macro from inside your other macro, as follows:

 

  MAC TEST
  LABEL {1}
  BYTE {1}
  ENDM

Then this works:

 

variable SET 10
  TEST variable

The output is as follows:

 

Label10
  BYTE variable ; which gives you a byte of $0A

The only reason I suggest defining a macro called LABEL is in case you want to call it from inside multiple macros.

Michael