Add initial source

Makefile

@@ -0,0 +1,21 @@
+SRC=$(wildcard src/*.c)
+INCLUDE=$(wildcard src/include/*.h)
+OBJ=$(patsubst src/%.c,build/%.rel,$(SRC))
+
+all: build/ec.rom
+
+clean:
+	rm -rf build
+
+build/ec.rom: build/ec.ihx
+	mkdir -p build
+	makebin -p < $< > $@
+
+build/ec.ihx: $(OBJ)
+	mkdir -p build
+	sdcc -mmcs51 -o $@ $<
+
+build/%.rel: src/%.c $(INCLUDE)
+	mkdir -p build
+	cd build && \
+	sdcc -mmcs51 -c ../$<