sbasm patches

Bugs fixed in sbasm 3.03.06:

• Allow assembled output files > 64 KB
• Allow whitespace in expressions

Bugfix #1:

The out-of-the-box default for sbasm is that it will produce a warning if you try to assemble files that generate code/data past the $FFFF address.

(For example, you are trying to create a disk image.)

That is, this assembly ...

    .or $FFFF
    .db 1, 2

... will produce this bogus warning:

*** Warning: Target program memory full

The patch in cr6502.py increases the limit to 32 MB (the maximum size for a ProDOS volume.)

Unfortunately, there is no command line switch or directive to turn this warning off.

Bugfix #2:

Imagine for a second if Mathematicians decided that these two expressions were NOT equivalent:

a = 1+2
b = 1 + 2

You would say this is utterly stupid / insane as both a and b have same the value 3. That is, whitespace does NOT change semantics! Now, normally, you would be correct -- unless you are using the broken 6502 assembler sbasm:

a = 1+2     ; 3
b = 1 + 2   ; 1 !?!?

Ironically, sbasm, is written in Python, which DOES parses the above correctly.

i.e.

        .or $FE
        .db 256 - * ; supposed to be FE: 02

The patch in assem.py fixes the bug where whitespaces in an expression cause sbasm to ignore the rest of the line. The heart of the function EvalExpr() was literally re-written from scratch. Guess who didn't fail their 301 Compilers and Interpreters class. :-)

Thanks

• Nox Archaist for the > 64 KB file size patch