r40c              469 dev/ic/opl.c   	u_int8_t r20m, r20c, r40m, r40c, rA0, rB0;
r40c              525 dev/ic/opl.c   	r40c = (ksl1 & OPL_KSL_MASK) | vol1;
r40c              543 dev/ic/opl.c   	opl_set_op_reg(sc, OPL_KSL_LEVEL,   voice, 1, r40c);