Add interrupt based timer and test code

hw/efinix_fpga/test_programs/Makefile

@@ -1,11 +1,18 @@
-TARGETS=stacktest runram timer
+TARGETS=stacktest runram timer timer_irq
+SRC=$(wildcard *.s)
+DIR=../ip/bram
 
 all: $(TARGETS)
 
-$(TARGETS):
+$(TARGETS): $(SRC)
 	cl65 --cpu 65c02 -C link.ld -l $@.list $@.s
 	xxd -ps $@ | fold -w 2 > $@.hex
 
+install:
+	cp $(TARGET).hex $(DIR)/init_hex.mem
+	cd $(DIR);python3 efx_mem_init_script.py hex init_hex.mem
+
+
 clean:
 	rm -f $(TARGETS)
 	rm *.hex