Problem with Toggle Statement

George-ILM

I am new to the SX and to SX/B and am unsure what might be the problem with the "TOGGLE reverseDirection" statement at line 100 in the attached SX/B source code.· I have SX/B 1.51.03 and SX Key 3.92.h beta.

When I compile the source code the resulting assembly listing shows an error at "Line 288, Error 1, Pass 2"
(XOR reverseDirection,#%00000100 ;····· TOGGLE reverseDirection).

The variable 'reverseDirection' is used in an earlier statement, seemingly without problem.· Also there is an earlier TOGGLE statement resulting in an apparently valid XOR statement.

I would appreciate any insight into this problem.

-- George

Capdiamont

I've had problems with that too in the past. The other way to do that is

reverseDirection = NOT reverseDirection

Edit: replaced your code with above, and it works fine, or at lease compiles.

Post Edited (Capdiamont) : 10/20/2008 4:23:14 AM GMT

George-ILM

Well, it is comforting to know that I am not the only one who has encountered the problem.· The generated assembly code looks reasonable (to this newbie).· It is unclear to me why the XOR statement is flagged as a problem.

I see that the SX/B compiler software is several years old.· Is it still being maintained?

Capdiamont

Should have 2.0 release soon.

mojorizing

George,
XOR is looking for a byte.· If you substitute the following in your variables declaration, it'll compile.· Notice now·the XOR is with "DirectionByte" in the list file.

' ---------------------------------------------------------------------------------------
' Variables
' ---------------------------------------------------------------------------------------
powerLevel VAR BYTE
powerUnits VAR BYTE
DirectionByte VAR BYTE
reverseButDwn  VAR DirectionByte.0
powerButDwn  VAR DirectionByte.1
reverseDirection VAR DirectionByte.2

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