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

Hit the docs -- in ASSEMBLY the vanilla BANK statement will not  set all bits of the upper nibble of FSR, only three.

On the SX28, it doesn't matter, as it doesn't have the upper 8 banks of RAM.

Generally, if doing assembly, it helps to use a macro for BANK, e.g.

[code]

ASM
_BANK MACRO 1
  BANK \1 
  IFDEF SX48_52; For SX48/52 change
     IF \1 & %10000000 ; FSR bit 7
         SETB FSR.7
     ELSE
         CLRB FSR.7
     ENDIF
  ENDIF
  ENDM
ENDASM

' then in use ....
ASM
_BANK someVarName
 MOVE W, someVarName
_BANK someOtherVar
MOV someOtherVar W
ENDASM
[/code]

I generally *always* use the macro for all assembly so it doesn't matter if it compiles for an SX28 or SX48.

Note that on the SX48 it will always take TWO instructions to properly set the bank.

The "BANK" instruction in SX/B handles this for you, so you may not ever have seen it, unless you check the assembly output carefully.

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=454280#m454319

Need assistance? Send an email to the Forum Administrator at sysadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2010 (http://www.dotNetBB.com)