Yoshi Coin Counter

Hello,

I am playing the hack SA-1: Special Adventure - 1, which uses this patch.

It works well, but sadly the number of levels fully cleared doesn't seem to save in SRAM : when restarting the game it starts back to 0, which is a little pity because the player can't keep track of their 100% completion of the game...

In addition I think this patch, in its current non-SRAM-saving state, only has purpose if you start the game from the beginning (what is the point of counting cleared levels from 0 if you start from a latter point in the game ?)

Is there a way of making it saving the number to SRAM ? This would be so cool =]

How can I make it so that I can still use the Bonus Stars and save the Yoshi coins to SRAM so that it can be accessed by other ASM stuff?

In the freecode portion of this patch, BCC .return was changed to BNE .return in order to prevent the !sram counter from incrementing for each Yoshi Coin collected beyond the fifth in a given level. This was deemed too significant an oversight not to change, but too simple a fix to warrant complete rejection.

Note that, while the define !sram may be changed, it MUST be absolute (four digits, $XXXX) or the game will crash.

Overall this is a simple and effective patch, useful to those who want to give Yoshi coins some extra function without straying too far from the classic Yoshi coin feel. If there's ever an update to this patch in the future, there are a couple very minor improvements that could be made:

Notes: Show/Hide

• The patch uses three hijacks near $008F5E to inefficiently mold itself around vanilla code no longer in use, when one consolidated hijack would be much cleaner:
  
  
  Code

  org $008F5E
  	LDA !sram|!addr
  	CMP #$64
  	BCC $0E
  	LDA #$63
  	BRA $0A

  
  
• The patch does not change the data bank, and may thus use freedata instead of freecode.
  
  
• Changing the #$05 in CMP #$05 in the freespace portion to a define would allow users to easily choose how many dragon coins must be found to trigger setting the "all collected" flag (ideally with a corresponding edits at $008FDC and $008FF6, and maybe $00F377).

Tested with Asar 1.71, Lunar Magic 3.10, SA-1 1.32, Snes9x 1.59.2.