; Mockingboard defines:

CARD_BASE = $C100

SY6522_A_BASE = $00
SY6522_A_PH_BASE = $10	; Phasor mode (this is common to both MB & Phasor modes)
SY6522_B_BASE = $80

SY6522_ORB = 0
SY6522_ORA = 1
SY6522_DDRB = 2
SY6522_DDRA = 3
SY6522_TIMER1L_COUNTER = 4
SY6522_TIMER1H_COUNTER = 5
SY6522_TIMER2L_COUNTER = 8
SY6522_TIMER2H_COUNTER = 9
SY6522_ACR = $B
SY6522_IFR = $D
SY6522_IER = $E

AY_AFINE	= 0
AY_ACOARSE	= 1
AY_BFINE	= 2
AY_BCOARSE	= 3
AY_CFINE	= 4
AY_CCOARSE	= 5
AY_NOISEPER	= 6
AY_ENABLE	= 7
AY_AVOL		= 8
AY_BVOL		= 9
AY_CVOL		= 10
AY_EFINE	= 11
AY_ECOARSE	= 12
AY_ESHAPE	= 13

AY_NOISE_MASK = $1f		; valid bits of AY_NOISEPER
AY_AMPLITUDE_MODE = $10	; b4 of AY_xVOL (0=fixed, 1=envelope)

AY_ENA_A	= %110110	; Enable A (Noise & Tone)
AY_ENA_B	= %101101	; Enable B (Noise & Tone)
AY_ENA_C	= %011011	; Enable C (Noise & Tone)

AY_DIS_A	= %001001	; Disable A (Noise & Tone)
AY_DIS_B	= %010010	; Disable B (Noise & Tone)
AY_DIS_C	= %100100	; Disable C (Noise & Tone)

; AY inputs on BDIR|BC2|BC1:
AY_RESET	= 0
AY_INACTIVE	= 4
AY_READ		= 5
AY_WRITE	= 6
AY_LATCH	= 7

; Phasor mode
PH_MOCKINGBOARD = 8
PH_PHASOR = $D
PH_ECHOPLUS = $F