From 8267c0bc3b04b5a990809e851389d9f2bc65e81a Mon Sep 17 00:00:00 2001
From: ISSOtm <eldredhabert0@gmail.com>
Date: Mon, 4 Jun 2018 19:02:13 +0200
Subject: Add workaround to rgbfix 0.3.7 checksum bug Please refer to
 zero_checksum.inc for details

---
 Makefile          | 3 ++-
 zero_checksum.inc | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)
 create mode 100644 zero_checksum.inc

diff --git a/Makefile b/Makefile
index bf7cf66..106d85d 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,8 @@ mostlyclean:
 	rm -rf $(ROM) $(CORRECTEDROM) $(OBJS) $(OBJS:.o=.d) $(ROMS:.gb=.sym) $(ROMS:.gb=.map)
 
 $(CORRECTEDROM): %-correctheader.gb: %.gb
-	cp $< $@
+	$(RGBASM) $(RGBASMFLAGS) -o zero_checksum.o zero_checksum.inc
+	$(RGBLINK) -O $< -o $@ zero_checksum.o
 	$(RGBFIX) -f hg -m 0x10 $@
 
 $(ROM): poke%-spaceworld.gb: $(OBJS) | $(BASEROM)
diff --git a/zero_checksum.inc b/zero_checksum.inc
new file mode 100644
index 0000000..c35e834
--- /dev/null
+++ b/zero_checksum.inc
@@ -0,0 +1,6 @@
+
+; This is part of a workaround to RGBFIX 0.3.7, which does not compute the global checksum correctly
+; if it's not 0 in the pre-fix ROM. See https://github.com/rednex/rgbds/issues/280
+
+SECTION "RGBFIX 0.3.7 workaround", ROM0[$14E]
+    dw 0
\ No newline at end of file
-- 
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