/* Status */
A000

/* silence all channels */
A000:9F
A000:BF
A000:DF
A000:FF


/* turn on all channels */
A000:90
A000:B0
A000:D0
A000:F0

/* example */
A000:83  // play tone
A000:12
A000:90  // 0x90 - ch0 loud
A000:9F  // 0x9f - ch0 lowest

/* psg */
A000:80
A000:0F
A000:91

    1 POKE -8192,128
    2 POKE -8192,15
    3 POKE -8192,145
    4 GOTO 1

/* Bridge */
    1 POKE -8192,159
    2 POKE -8192,191
    3 POKE -8192,223
    4 POKE -8192,255
    5 POKE -8192,144
   20 FOR H=0 TO 63
   25 FOR L=128 TO 143
   27 FOR C=0 TO 10
   30 POKE -8192,L
   40 POKE -8192,H
   90 NEXT C
   91 NEXT L
   92 NEXT H
   95 POKE -8192,159
   99 END