The best way to get "inside" a game is to
disassemble the game's ROMs. This lets you see how the game
truly works. Of course, making sense of the disassembled
code is no small task. I often spend months deciphering the
assembly code for a game.
When I find an interesting
routine to comment, I try to be as detailed as possible.
So instead of doing something like this:
L1464: LD DE,00038h ; Something
with the score...
CALL L1363 ;
CALL L136C ;
CALL L146F ;
JP L21C1 ;
I try to add more detail like this:
L1464: LD DE,00038h ; Phrase = "(%) Your Score is (n)"
CALL L1363 ; Call Speech Routine (phrase)
CALL L136C ; Clear Speech Buffer
CALL L146F ; Speak Score
JP L21C1 ; Command Speech Chip to speak buffer
Of course none of the code is
completely commented, but the main routines are there. Want
to try hacking on your own? Check out the ROMHACK
"INSIDE" the following games: