OPL_TIMER_CONTROL
opl_command(sc, OPL_L, OPL_TIMER_CONTROL,
opl_command(sc, OPL_L, OPL_TIMER_CONTROL, OPL_IRQ_RESET);
opl_command(sc, OPL_L, OPL_TIMER_CONTROL, /* start timer1 */
opl_command(sc, OPL_L, OPL_TIMER_CONTROL,
opl_command(sc, OPL_L, OPL_TIMER_CONTROL, OPL_IRQ_RESET);