From fe7578801576cf8ebec0eb8dab2246fc5c466b67 Mon Sep 17 00:00:00 2001
From: Christian Groessler <chris@groessler.org>
Date: Thu, 19 Sep 2013 23:34:45 +0200
Subject: [PATCH] add CHARGEN_RELOC knob to conditionally include the code to
 change CHBASE

---
 libsrc/atari/romswitch.inc | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/libsrc/atari/romswitch.inc b/libsrc/atari/romswitch.inc
index 58e09042a..9e229ea63 100644
--- a/libsrc/atari/romswitch.inc
+++ b/libsrc/atari/romswitch.inc
@@ -7,9 +7,10 @@
 
 .ifdef __ATARIXL__
 
-USEWSYNC=	1
+USEWSYNC =      1
+CHARGEN_RELOC = 1
 
-.if USEWSYNC
+.if .defined(USEWSYNC) .and .defined(CHARGEN_RELOC)
 .macro  wsync
         sta     WSYNC
 .endmacro
@@ -24,25 +25,31 @@ USEWSYNC=	1
         and     #$fe
         wsync
         sta     PORTB
+.ifdef CHARGEN_RELOC
         lda     #>__CHARGEN_START__
         sta     CHBAS
         sta     CHBASE
+.endif
 .endmacro
 .macro  disable_rom_quick
         lda     PORTB
         and     #$fe
         sta     PORTB
+.ifdef CHARGEN_RELOC
         lda     #>__CHARGEN_START__
         sta     CHBAS
         sta     CHBASE
+.endif
 .endmacro
 .macro  disable_rom_val val
         lda     val
         wsync
         sta     PORTB
+.ifdef CHARGEN_RELOC
         lda     #>__CHARGEN_START__
         sta     CHBAS
         sta     CHBASE
+.endif
 .endmacro
 
 .macro  enable_rom
@@ -50,17 +57,21 @@ USEWSYNC=	1
         ora     #1
         wsync
         sta     PORTB
+.ifdef CHARGEN_RELOC
         lda     #$E0
         sta     CHBAS
         sta     CHBASE
+.endif
 .endmacro
 .macro  enable_rom_quick
         lda     PORTB
         ora     #1
         sta     PORTB
+.ifdef CHARGEN_RELOC
         lda     #$E0
         sta     CHBAS
         sta     CHBASE
+.endif
 .endmacro
 
 .else   ; above __ATARIXL__, below not
-- 
2.39.5