Now program takes less space in RAM.
All variables, costants and Lists are moved before the SID song,
in a previously unused space (BASIC RAM).
SID song edit has been changed:
- same song but slightly different
- takes up a bit less than 4k
- more catchy :-)
- perfectly fits in $1000-$2000 and allows...
...the new custom charset to be put at $2000!
- Taken TGGS font and properly customized with tiles
Now actual program starts at $2800.
Also added some useful code for assembler to output debug infos when
assembling with -DDEBUG=1
In the meanwhile discovered tremendous subtle bug due to uninitialized
structure (listX and listY). Fixed.
Memory map now is:
+-------------------------------+
0000 | things in zero page |
| and low RAM |
+-------------------------------+
0800 | BASIC autostart |
| then data (variables, |
| costants and strings) | <-- this can be done better using segments. Reminder for the future.
| |
+-------------------------------+
0E00 | listX |
+-------------------------------+
0F00 | listY |
+-------------------------------+
1000 | SID song |
| |
| |
+-------------------------------+
2000 | TGGS Custom font charset |
| |
+-------------------------------+
2800 | ACTUAL CODE |
| | <-- plus some garbage data, see above (segments TODO)
. .
. .
