giomba 299eee1257 Reorganized memory ...

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)
	.				.
	.				.

2018-09-10 21:39:53 +02:00

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