; zero page
; pre-defined applesoft vars
CH = $24
CV = $25
GBASL = $26
GBASH = $27
BASL = $28
BASH = $29
AY_REGS = $70
FRAME = $80
SONG_OFFSET = $81
SONG_COUNTDOWN = $82
OUR_ROT = $A5
HGR_X = $E0
HGR_XH = $E1
HGR_Y = $E2
HGR_COLOR = $E4
HGR_PAGE = $E6
HGR_SCALE = $E7
COUNT = $FB