Z88 Developers' Notes
Contents   Contents of System Calls

OS_Blp, make a bleep

RST 20H, DEFW $D806

IN:

     A = sound count
     B = space count
     C = mark count
OUT:
     Fc = 0 always
Registers changed after return:
     ....DEHL/IXIY same
     AFBC..../.... different
Notes:
Called as VDU 1, n, "!", ...
Bugs: