58 lines
1.1 KiB
Plaintext
58 lines
1.1 KiB
Plaintext
; Mockingboard defines:
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CARD_BASE = $C100
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SY6522_A_BASE = $00
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SY6522_A_PH_BASE = $10 ; Phasor mode (this is common to both MB & Phasor modes)
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SY6522_B_BASE = $80
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SY6522_ORB = 0
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SY6522_ORA = 1
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SY6522_DDRB = 2
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SY6522_DDRA = 3
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SY6522_TIMER1L_COUNTER = 4
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SY6522_TIMER1H_COUNTER = 5
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SY6522_TIMER2L_COUNTER = 8
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SY6522_TIMER2H_COUNTER = 9
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SY6522_ACR = $B
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SY6522_IFR = $D
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SY6522_IER = $E
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AY_AFINE = 0
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AY_ACOARSE = 1
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AY_BFINE = 2
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AY_BCOARSE = 3
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AY_CFINE = 4
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AY_CCOARSE = 5
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AY_NOISEPER = 6
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AY_ENABLE = 7
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AY_AVOL = 8
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AY_BVOL = 9
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AY_CVOL = 10
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AY_EFINE = 11
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AY_ECOARSE = 12
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AY_ESHAPE = 13
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AY_NOISE_MASK = $1f ; valid bits of AY_NOISEPER
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AY_AMPLITUDE_MODE = $10 ; b4 of AY_xVOL (0=fixed, 1=envelope)
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AY_ENA_A = %110110 ; Enable A (Noise & Tone)
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AY_ENA_B = %101101 ; Enable B (Noise & Tone)
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AY_ENA_C = %011011 ; Enable C (Noise & Tone)
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AY_DIS_A = %001001 ; Disable A (Noise & Tone)
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AY_DIS_B = %010010 ; Disable B (Noise & Tone)
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AY_DIS_C = %100100 ; Disable C (Noise & Tone)
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; AY inputs on BDIR|BC2|BC1:
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AY_RESET = 0
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AY_INACTIVE = 4
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AY_READ = 5
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AY_WRITE = 6
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AY_LATCH = 7
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; Phasor mode
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PH_MOCKINGBOARD = 8
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PH_PHASOR = $D
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PH_ECHOPLUS = $F
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