Special Use Flags?

Does anybody know the exact purpose of any special-use flags in video games? And when would these flags really be needed?

For example, the 'DeathMusicLoaded' flag in Super Mario Bros., Super Mario Bros. 2 (Japan) and All Night Nippon Super Mario Bros. is one such example:

Code:

HoleDie: inx                      ;set flag in X for player death         ldy GameEngineSubroutine ;check for other specific routines running          cpy #$0b         beq ChkHoleX             ;if so, branch ahead         ldy DeathMusicLoaded     ;check value here         bne HoleBottom           ;if already set, branch to next part         iny         sty EventMusicQueue      ;otherwise increment to play death music         sty DeathMusicLoaded     ;and set value here

~Ben (SMB2J-2Q)

Statistics: Posted by SMB2J-2Q — Thu Aug 15, 2024 3:51 am — Replies 5 — Views 270