OS_Wrt, Write token

Register parameters

RST 20H, DEFW $CC06

IN:
     A = token (A7 = 1 always)
OUT:
     Fc = 0

Registers changed after return:
     A.BCDEHL/IXIY same
     .F....../.... different

This will write the "menu topic help" token if a local token table has not been established with OS_Wtb.

OS_Wtb, write token base
OS_Wts, write tokenized string