acme/ACME_Lib/cbm/c64/sid.a

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;ACME 0.95
!ifdef lib_cbm_c64_sid_a !eof
lib_cbm_c64_sid_a = 1
!address {
; write-only registers:
; voice 1:
sid_v1_freq_lo = $d400
sid_v1_freq_hi = $d401
sid_v1_width_lo = $d402
sid_v1_width_hi = $d403
sid_v1_control = $d404 ; see below for bits
sid_v1_attack_decay = $d405 ; hi-nibble: attack length, low-nibble: decay length
sid_v1_sustain_release = $d406 ; hi-nibble: sustain volumne, low-nibble: release length
; voice 2:
sid_v2_freq_lo = $d407
sid_v2_freq_hi = $d408
sid_v2_width_lo = $d409
sid_v2_width_hi = $d40a
sid_v2_control = $d40b ; see below for bits
sid_v2_attack_decay = $d40c ; hi-nibble: attack length, low-nibble: decay length
sid_v2_sustain_release = $d40d ; hi-nibble: sustain volumne, low-nibble: release length
; voice 3:
sid_v3_freq_lo = $d40e
sid_v3_freq_hi = $d40f
sid_v3_width_lo = $d410
sid_v3_width_hi = $d411
sid_v3_control = $d412 ; see below for bits
sid_v3_attack_decay = $d413 ; hi-nibble: attack length, low-nibble: decay length
sid_v3_sustain_release = $d414 ; hi-nibble: sustain volumne, low-nibble: release length
}
; voice control bits:
sid_VOICECONTROL_NOISE = %#.......
sid_VOICECONTROL_RECTANGLE = %.#......
sid_VOICECONTROL_SAWTOOTH = %..#.....
sid_VOICECONTROL_TRIANGLE = %...#....
sid_VOICECONTROL_DISABLE_RESET = %....#... ; 1 = disable voice, reset noise generator
sid_VOICECONTROL_RINGMODULATION = %.....#..
sid_VOICECONTROL_SYNC = %......#.
sid_VOICECONTROL_ON = %.......# ; 0 = release, 1 = attack/sustain/decay
!address {
; registers shared by all voices:
sid_filter_cutoff_lo = $d415 ; only bits 0/1/2!
sid_filter_cutoff_hi = $d416
sid_filter_control = $d417 ; hi-nibble: resonance, lo-nibble: filter ext/v3/v2/v1
sid_filter_volume = $d418 ; hi-nibble: filter mode (disable v3, high, band, low), lo-nibble: volume
; read-only registers:
sid_potx = $d419
sid_poty = $d41a
sid_v3_waveform_output = $d41b
sid_v3_adsr_output = $d41c
}
; Do not use the shadow copies of these registers at $d5xx, $d6xx or $d7xx:
; on a C128 they do not exist!