Moved the font into a separate module in the library.

The font can be replaced, at link-time, by a custom file.

libsrc/pce/conio.s

@@ -3,6 +3,7 @@
         .import         vdc_init
         .import         psg_init
         .import         colors
+        .import         _pce_font
         .importzp       ptr1, tmp1
 
         .include        "pce.inc"
@@ -53,8 +54,8 @@ load_font:
 ;       rts                     ; (fall through)
 
 ; Point to the font data.
-copy:   lda     #<font
-        ldx     #>font
+copy:   lda     #<_pce_font
+        ldx     #>_pce_font
         sta     ptr1
         stx     ptr1+1
 
@@ -84,6 +85,3 @@ fillloop:
         bne     charloop        ; next character
 
         rts
-
-.rodata
-font:   .include        "vga.inc"

libsrc/pce/vga.s

@@ -1,10 +1,15 @@
 ;----------------------------------------------------------------------------
 ; VGA font for the PC-Engine conio implementation
 
+        .export _pce_font
+
 ; The character tiles use only two colors from each pallette.  Color zero
 ; comes from pallette zero; color one is different in each pallette.  The
 ; color of a character is set by choosing one of the 16 pallettes.
 
+.rodata
+
+_pce_font:
         .byte   $00, $00, $00, $00, $00, $00, $00, $00
 
         .byte   %00000000