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/pce/chline.s

@@ -6,15 +6,14 @@
 ;
 
         .export         _chlinexy, _chline
-        .import         popa, _gotoxy, cputdirect
+        .import         gotoxy, cputdirect
         .importzp       tmp1
 
         .include        "pce.inc"
 
 _chlinexy:
         pha                     ; Save the length
-        jsr     popa            ; Get y
-        jsr     _gotoxy         ; Call this one, will pop params
+        jsr     gotoxy          ; Call this one, will pop params
         pla                     ; Restore the length
 
 _chline:

libsrc/pce/cputc.s

@@ -5,7 +5,7 @@
 
         .export         _cputcxy, _cputc, cputdirect, putchar
         .export         newline, plot
-        .import         popa, _gotoxy
+        .import         gotoxy
         .import         PLOT
         .import         xsize
 
@@ -16,8 +16,7 @@
 
 _cputcxy:
         pha                     ; Save C
-        jsr     popa            ; Get Y
-        jsr     _gotoxy         ; Set cursor, drop x
+        jsr     gotoxy          ; Set cursor, drop x and y
         pla                     ; Restore C
 
 ; Plot a character - also used as internal function

libsrc/pce/cvline.s

@@ -6,15 +6,14 @@
 ;
 
         .export         _cvlinexy, _cvline
-        .import         popa, _gotoxy, putchar, newline
+        .import         gotoxy, putchar, newline
         .importzp       tmp1
 
         .include        "pce.inc"
 
 _cvlinexy:
         pha                     ; Save the length
-        jsr     popa            ; Get y
-        jsr     _gotoxy         ; Call this one, will pop params
+        jsr     gotoxy          ; Call this one, will pop params
         pla                     ; Restore the length and run into _cvline
 
 _cvline:

libsrc/pce/gotoxy.s

@@ -2,12 +2,15 @@
 ; void gotoxy (unsigned char x, unsigned char y);
 ;
 
-        .export         _gotoxy
+        .export         gotoxy, _gotoxy
         .import         popa, plot
 
         .include        "pce.inc"
         .include        "extzp.inc"
 
+gotoxy:
+        jsr     popa            ; Get Y
+
 _gotoxy:
         sta     CURS_Y          ; Set Y
         jsr     popa            ; Get X