YMADDR	equ $4000
YMDATA	equ $4001
YMADDR2	equ $4002
YMDATA2	equ $4003

YM_LFO		equ $22
YM_TIMERA_L	equ $24
YM_TIMERA_H	equ $25
YM_TIMERB	equ $26
YM_MODE		equ $27
YM_OPER		equ $28
YM_DAC		equ $2a
YM_DACEN	equ $2b

YM_OP1_DT1MUL	equ $30
YM_OP2_DT1MUL	equ $34
YM_OP3_DT1MUL	equ $38
YM_OP4_DT1MUL	equ $3c

; vi:ft=z80: