c64lib/sid.asm at master · barryw/c64lib · GitHub

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/*

Constants for the C64's Sound Interface Device (SID)

*/
.namespace sid {
  .label FRELO1 = $d400
  .label FREHI1 = $d401
  .label PWLO1  = $d402
  .label PWHI1  = $d403
  .label VCREG1 = $d404
  .label ATDCY1 = $d405
  .label SUREL1 = $d406
  .label FRELO2 = $d407
  .label FREHI2 = $d408
  .label PWLO2  = $d409
  .label PWHI2  = $d40a
  .label VCREG2 = $d40b
  .label ATDCY2 = $d40c
  .label SUREL2 = $d40d
  .label FRELO3 = $d40e
  .label FREHI3 = $d40f
  .label PWLO3  = $d410
  .label PWHI3  = $d411
  .label VCREG3 = $d412
  .label ATDCY3 = $d413
  .label SUREL3 = $d414
  .label CUTLO  = $d415
  .label CUTHI  = $d416
  .label RESON  = $d417
  .label SIGVOL = $d418
  .label POTX   = $d419
  .label POTY   = $d41a
  .label RANDOM = $d41b
  .label ENV3   = $d41c
}