+?const: jp 0 ; return console input status\r
+?conin: jp 0 ; return console input character\r
+?cono: jp 0 ; send console output character\r
+?list: jp 0 ; send list output character\r
+?auxo: jp 0 ; send auxiliary output character\r
+?auxi: jp 0 ; return auxiliary input character\r