rA0               469 dev/ic/opl.c   	u_int8_t r20m, r20c, r40m, r40c, rA0, rB0;
rA0               527 dev/ic/opl.c   	rA0  = block_fnum & 0xFF;
rA0               544 dev/ic/opl.c   	opl_set_ch_reg(sc, OPL_FNUM_LOW,    voice,    rA0);