diff --git a/RomPatcher/Sun2_FastBoot/Makefile b/RomPatcher/Sun2_FastBoot/Makefile
new file mode 100644
index 0000000..4fc61fa
--- /dev/null
+++ b/RomPatcher/Sun2_FastBoot/Makefile
@@ -0,0 +1,41 @@
+RETRO68=/home/dolbeau/Retro68/build/toolchain
+AS=${RETRO68}/bin/m68k-apple-macos-as
+CC=${RETRO68}/bin/m68k-apple-macos-gcc
+LD=${RETRO68}/bin/m68k-apple-macos-ld
+STRIP=${RETRO68}/bin/m68k-apple-macos-strip
+OBJCOPY=${RETRO68}/bin/m68k-apple-macos-objcopy
+NM=${RETRO68}/bin/m68k-apple-macos-nm
+
+HOSTCC=gcc
+HOSTCFLAGS=-O2
+
+ARCHFLAGS=-march=68010 -mcpu=68010
+CFLAGS=-O2 -mpcrel
+
+GENLINK=../patcher/genlink
+PATCHER=../patcher/patcher
+
+all: sun2-multi-rev-R.bin
+
+show: rompatch.elf
+	$(NM) $< | sort
+
+sun2-multi-rev-R.bin: ../ rompatch.raw input.txt
+	/bin/cp ../sun2-multi-rev-R.bin sun2-multi-rev-R.bin
+	${PATCHER} -i rompatch.raw -p sun2-multi-rev-R.bin -d input.txt
+
+linker.ld: input.txt rompatch.s
+	${GENLINK} -d $< >| $@
+	echo $(shell for X in `grep .section rompatch.s | awk '{ print $$2 }' `; do grep -q $$X linker.ld || echo " $$X has no entry in linker.ld" && /bin/false; done)
+
+rompatch.o: rompatch.s
+	${AS} ${ARCHFLAGS} $< -o $@ -a > rompatch.l
+
+rompatch.elf: linker.ld rompatch.o ${CSRC:.c=.o} # linker script must be first
+	${LD} -o $@ -T $^
+
+rompatch.raw: rompatch.elf
+	${OBJCOPY} $^ $@ --input-target=elf32-m68k --output-target=binary
+
+clean:
+	rm -f res.inc ${CSRC_ASM} *.o rompatch.srec rompatch.raw rompatch.dir rompatch.l linker.ld rompatch.elf
diff --git a/RomPatcher/Sun2_FastBoot/README.MD b/RomPatcher/Sun2_FastBoot/README.MD
new file mode 100644
index 0000000..3921431
--- /dev/null
+++ b/RomPatcher/Sun2_FastBoot/README.MD
@@ -0,0 +1,2 @@
+loweritercount: reduce the count of iteration in the wite loop between LED value.
+Mconstop: skip memory testing
diff --git a/RomPatcher/Sun2_FastBoot/input.txt b/RomPatcher/Sun2_FastBoot/input.txt
new file mode 100644
index 0000000..f9513f8
--- /dev/null
+++ b/RomPatcher/Sun2_FastBoot/input.txt
@@ -0,0 +1,3 @@
+0x0001b6, 0, diagret
+0x000b80, 2, loweritercount
+0x000e80, 4, Mconstop
diff --git a/RomPatcher/Sun2_FastBoot/rompatch.s b/RomPatcher/Sun2_FastBoot/rompatch.s
new file mode 100644
index 0000000..95c3107
--- /dev/null
+++ b/RomPatcher/Sun2_FastBoot/rompatch.s
@@ -0,0 +1,11 @@
+	.section .text.diagret
+diagret:
+
+	.section .text.loweritercount
+loweritercount:
+	.short 2	
+
+	.section .text.Mconstop
+Mconstop:
+	jmp (%pc,diagret)
+	
diff --git a/RomPatcher/Sun2_FastBoot/sun2-multi-rev-R.bin b/RomPatcher/Sun2_FastBoot/sun2-multi-rev-R.bin
new file mode 100644
index 0000000..6fa1476
Binary files /dev/null and b/RomPatcher/Sun2_FastBoot/sun2-multi-rev-R.bin differ