More thoughts about single-load Lode Runner

[Steve Nickolas <usotsuki@buric.co>]

All this, I think, can be done without too much hassle, once the necessary 
code addresses are found.

1. Location of the editor, so it can be dummied out and used for patch 
space.  I think I've got this; I mentioned it in the GameMaker thread.

2. Location of code relating to the disk-based high score list.  This 
should be replaced with a blank list initially and not saved to disk.

3. Location of code relating to reading levels off the disk.  This would 
be replaced by a simple memory mover initially.

Initially, the levels will need to be stored from $2000.5FFF.  This space 
is not used when the program is loading, and is immediately blanked at 
startup; before that, we can do a test for a language card, and move the 
data up there.  With *absolutely no compression*, up to 64 levels would 
fit on the card; by using a 224 base instead of a 256 base, this number 
can be increased to 73, and still no compression is really being used. 
(That's almost half the game - and more than cartridge or tape versions of 
the day held!)

Once I can figure out the addresses, and I really don't have a clue where 
to look, I can probably write the first version myself.  Maybe a better 
coder than I could ram even more of the game into the limited memory.

-uso.