/ / PDP-11 C. / Stdio. / / Clear event flag. / clef(efn); / Returns -1 on error. / .globl clef clef: jsr r0,_save clr r0 mov 12(r5),-(sp) mov $31.+[2.<<8.],-(sp) emt 377 bcc 0f dec r0 0: jmp _ret