Issues in the source which should be fixed.
1. Backpatching
Currently backpatching handles JMPs and CALLs only. It
is unable to handle PUSHs ( and may be others as well).
So the backpatch routine calculates addresses wrong and
as a result an additional assembly pass is required.
2. Two Pass Minimum
Currently the generated code/data bytes aren't stored in
assembly pass one. So a second pass is always needed.
With better backpatching capabilities, JWasm should be
able to virtually become a one-pass assembler.
[ issue fixed in v2.06
3. Token Buffer
The token buffer is a global variable. This causes
a lot of problems. There are some workarounds implemented
to make the buffer reusable, but these hacks didn't
help to make the code more readable.
]