   disk[0].handleEncB();
   sei();
 }
+void disk0step_isr() {
+  cli();
+  disk[0].handleStep();
+  sei();
+}
 void disk1a_isr() {
   cli();
   disk[1].handleEncA();


  Example commands:

DISK-RESET
DISK-STATE success
DISK 0 POS 10 DIR 1 USER 1
DISK 1 POS 50 DIR 1 USER 1
DISK 2 POS 60 DIR 1 USER 2
DISK 0 DIR 0 USER 1
DISK 0 DIR 1 USER 1
DISK 0 DIR -1 USER 1
DISK 0 DIR 1 USER 1
DISK 1 DIR -1 USER 1
DISK 2 DIR 1 USER 1
DISK-EXIT

*/


      break;
    case DISK_HOMING:
      Serial.println(" homing");
      setTargetPosition(-1, DIR_CW);
      home = 0;
      break;
    }
  }
