diff --git a/sw/.gitignore b/sw/.gitignore
new file mode 100644
index 0000000..c6127b3
--- /dev/null
+++ b/sw/.gitignore
@@ -0,0 +1,52 @@
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
diff --git a/sw/Makefile b/sw/Makefile
new file mode 100644
index 0000000..85f9116
--- /dev/null
+++ b/sw/Makefile
@@ -0,0 +1,27 @@
+CC=cl65
+CFLAGS=-t none
+LDFLAGS=-C link.ld
+
+NAME=main
+
+BIN=$(NAME).bin
+HEX=$(NAME).hex
+
+SRCS=$(wildcard *.S) $(wildcard *.c)
+OBJS+=$(patsubst %.S,%.o,$(filter %S,$(SRCS)))
+OBJS+=$(patsubst %.c,%.o,$(filter %c,$(SRCS)))
+
+all: $(BIN)
+	objcopy --input-target=binary --output-target=ihex $(BIN) $(HEX)
+	
+
+$(BIN): $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) -o $@
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+.PHONY: clean
+clean:
+	rm -rf $(OBJS) $(BIN) $(HEX)
+
diff --git a/sw/link.ld b/sw/link.ld
new file mode 100644
index 0000000..f4ca7d7
--- /dev/null
+++ b/sw/link.ld
@@ -0,0 +1,10 @@
+MEMORY
+{
+  ROM: start=$8000, size=$8000, type=ro, define=yes, fill=yes, file=%O;
+}
+
+SEGMENTS
+{
+  CODE: load=ROM, type=ro;
+  VECTORS: load=ROM, type=ro, offset=$7ffa;
+}
diff --git a/sw/main.S b/sw/main.S
new file mode 100644
index 0000000..6a0ecb8
--- /dev/null
+++ b/sw/main.S
@@ -0,0 +1,10 @@
+          .setcpu "6502"
+          .segment "VECTORS"
+
+          .word   loop
+          .word   loop
+          .word   loop
+
+          .code
+loop:     lda #$12
+          jmp loop