git.sur5r.net Git - cc65/blob - libsrc/apple2/chline.s

   1 ;
   2 ; Ullrich von Bassewitz, 08.08.1998
   3 ;
   4 ; void chlinexy (unsigned char x, unsigned char y, unsigned char length);
   5 ; void chline (unsigned char length);
   6 ;
   7
   8         .export         _chlinexy, _chline, chlinedirect
   9         .import         popa, _gotoxy, cputdirect
  10         .importzp       tmp1
  11
  12 _chlinexy:
  13         pha                     ; Save the length
  14         jsr     popa            ; Get y
  15         jsr     _gotoxy         ; Call this one, will pop params
  16         pla                     ; Restore the length and run into _chline
  17
  18 _chline:
  19         ldx     #'-' | $80      ; Horizontal line, screen code
  20
  21 chlinedirect:
  22         cmp     #$00            ; Is the length zero?
  23         beq     L9              ; Jump if done
  24         sta     tmp1
  25 L1:     txa                     ; Screen code
  26         jsr     cputdirect      ; Direct output
  27         dec     tmp1
  28         bne     L1
  29 L9:     rts