Switched to sdcc based toolchain

Makefile

@@ -1,16 +1,34 @@
-BUILDDIR=.build
-_BIN= loader.bin
-BIN = $(patsubst %,$(BUILDDIR)/%,$(_BIN))
+AS = sdasz80
+LD = sdldz80
+OBJCOPY = sdobjcopy
+
+BUILD = .build
+
+TARGET = loader
+
+ASFLAGS = -plosff
+
+SRC = \
+src/loader.s \
+
+OBJ = $(addprefix $(BUILD)/, $(notdir $(SRC:.s=.rel)))
+vpath %.s $(sort $(dir $(SRC)))
 
 .PHONY: all clean
 
-all: $(BUILDDIR) $(BIN)
+all: $(BUILD) $(BUILD)/$(TARGET).bin
 
-$(BUILDDIR)/%.bin: src/%.z80 | $(BUILDDIR)
-	@zasm -w -i $< -o $@
+$(BUILD)/%.rel: %.s Makefile | $(BUILD)
+	$(AS) $(ASFLAGS) $@ $<
 
-$(BUILDDIR):
-	@mkdir $(BUILDDIR)
+$(BUILD)/$(TARGET).ihx: $(OBJ)
+	$(LD) -i $@ $(OBJ) -b MAIN=0x1100
+
+%.bin: %.ihx
+	$(OBJCOPY) -I ihex -O binary $< $@
+
+$(BUILD):
+	mkdir $@
 
 clean:
-	@rm -df $(BUILDDIR)/*.bin $(BUILDDIR)/*.lst .build
+	rm -fr $(BUILD)