 @del   ; not pressed
  ; control T is pressed
  tya         ; send ^T
  ldy #1
  rts
  
  ; send DEL
@del:
  lda #$08
  ldy #1
  rts


; --- unknown C=-Key ---
@not_del:
      ldy #0 ;means don't send anything
      rts

; *************************************
; *
; * screen handling
; *
; *************************************

; --- these variables become updated ---
;     on crsr movement.
;
; $d1 $d2  start of screen line
; $d3      crsr column
; $d6      crsr row
; $f3 $f4