; ############################ define ##############################

YMPORT0     EQU     $4000           ; YM2612 port 0
YMPORT1     EQU     $4001           ; YM2612 port 1
YMPORT2     EQU     $4002           ; YM2612 port 2
YMPORT3     EQU     $4003           ; YM2612 port 3
VDPSTATUS_H EQU     $7F04           ; VDP status port high
VDPSTATUS_L EQU     $7F05           ; VDP status port low
VCOUNTER    EQU     $7F08           ; V counter
HCOUNTER    EQU     $7F09           ; H counter
PSGPORT     EQU     $7F11           ; PSG port
BANKREG     EQU     $6000           ; bank register

COMPLAY_SFT EQU     0               ; start play command
COMSTOP_SFT EQU     4               ; stop play command

STATPLAY_SFT  EQU   0               ; playing status
STATREADY_SFT EQU   7               ; driver ready status

CH0_SFT     EQU     0               ; channel 0
CH1_SFT     EQU     1               ; channel 1
CH2_SFT     EQU     2               ; channel 2
CH3_SFT     EQU     3               ; channel 3

COMPLAY     EQU     1<<COMPLAY_SFT
COMSTOP     EQU     1<<COMSTOP_SFT

STATPLAY    EQU     1<<STATPLAY_SFT
STATREADY   EQU     1<<STATREADY_SFT

CH0         EQU     1<<CH0_SFT
CH1         EQU     1<<CH1_SFT
CH2         EQU     1<<CH2_SFT
CH3         EQU     1<<CH3_SFT


; ########################### variable #############################

COMMAND     EQU     $0100           ; command from 68K
STATUS      EQU     $0102           ; status from Z80
PARAMS      EQU     $0104           ; parameters (68K and Z80)