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# gbos - Game Boy Color Unix-flavored microkernel (scaffold)
# Toolchain: RGBDS (rgbasm/rgblink/rgbfix)
ROM := gbos.gb
BUILD := build
SRCS := $(wildcard src/*.asm)
OBJS := $(patsubst src/%.asm,$(BUILD)/%.o,$(SRCS))
ASFLAGS := -I include -Wall
# MBC5 + RAM + battery; -r 3 = 32 KiB cart RAM (bump for more task banks)
FIXFLAGS := -v -m MBC5+RAM+BATTERY -r 3 -p 0xFF -t GBOS
.PHONY: all clean run
all: $(ROM)
$(BUILD)/%.o: src/%.asm | $(BUILD)
rgbasm $(ASFLAGS) -o $@ $<
$(ROM): $(OBJS)
rgblink -m $(BUILD)/gbos.map -n $(BUILD)/gbos.sym -o $@ $(OBJS)
rgbfix $(FIXFLAGS) $@
$(BUILD):
mkdir -p $(BUILD)
clean:
rm -rf $(BUILD) $(ROM)
# convenience: run in an emulator if one is on PATH
run: $(ROM)
@which sameboy >/dev/null 2>&1 && sameboy $(ROM) || \
which bgb >/dev/null 2>&1 && bgb $(ROM) || \
echo "no emulator found (sameboy/bgb)"
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