; Handle Mae visibility.

       ld a,(maedel)       ; check Mae delay.
       cp $ff              ; is Mae already visible ($ff)?
       jp z,endmae         ; yes - then skip rest of Mae routine.
       cp 0                ; else - is delay counter depleted?
       jp nz,+             ; no - then skip forward, else...

; Make Mae visible by loading opaque tiles into buffer.

       ld hl,encar         ; point to enemy car char codes.
       ld de,maecc         ; point to buffer.
       call carcc          ; load new char codes to buffer.

+      ld hl,maedel        ; point to Mae delay counter.
       dec (hl)            ; decrement it.
endmae

; blah blah blah ... more code...

; Charcodes for player, enemy and invisible car.

plrcar .db 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
encar .db 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
invcar .db 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0