ref: a40ddc4668622c9068c3bf832e804ca7c9b6b4d7
dir: /engine/smallflag.asm/
SmallFarFlagAction: ; Perform action b on bit c in flag array hl. ; If checking a flag, check flag array d:hl unless d is 0. ; For longer flag arrays, see FlagAction. push hl push bc ; Divide by 8 to get the byte we want. push bc srl c srl c srl c ld b, 0 add hl, bc pop bc ; Which bit we want from the byte ld a, c and 7 ld c, a ; Shift left until we can mask the bit ld a, 1 jr z, .shifted .shift add a dec c jr nz, .shift .shifted ld c, a ; What are we doing to this flag? dec b jr z, .set ; 1 = SET_FLAG dec b jr z, .check ; 2 = CHECK_FLAG ; 0 = RESET_FLAG .reset ld a, c cpl and [hl] ld [hl], a jr .done .set ld a, [hl] or c ld [hl], a jr .done .check ld a, d cp 0 jr nz, .farcheck ld a, [hl] and c jr .done .farcheck call GetFarByte and c .done pop bc pop hl ld c, a ret