Introduced internal gotoxy that pops both parameters.

About all CONIO functions offering a <...>xy variant call
  popa
  _gotoxy

By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction.

libsrc/nes/gotoxy.s

@@ -4,21 +4,19 @@
 ; void gotoxy (unsigned char x, unsigned char y);
 ;
 
-        .export         _gotoxy
+        .export         gotoxy, _gotoxy
         .import         setcursor
         .import         popa
 
         .include        "nes.inc"
 
-.proc   _gotoxy
+gotoxy:
+        jsr     popa            ; Get Y
 
+_gotoxy:
         sta     CURS_Y          ; Set Y
         jsr     popa            ; Get X
         sta     CURS_X          ; Set X
         tay
         ldx     CURS_Y
         jmp     setcursor       ; Set the cursor position
-
-.endproc
-
-