--- /dev/null
+CC=sdcc
+NO_OPT=--nogcse --noinvariant --noinduction --nojtbound --noloopreverse \
+ --nolabelopt --nooverlay --peep-asm
+DEBUG=--debug
+
+CFLAGS=--model-large $(DEBUG) --less-pedantic \
+ --no-peep --int-long-reent --float-reent \
+ --data-loc 0x30
+
+LDFLAGS=-L/usr/share/sdcc/lib/large --out-fmt-ihx
+LDFLAGS_RAM=$(LDFLAGS) --code-loc 0xf000 --xram-loc 0xf400 --xram-size 1024
+
+LDFLAGS_FLASH=$(LDFLAGS) --code-loc 0x0000 --xram-loc 0xf000 --xram-size 1024
+
+SRC=timer.c
+ADB=$(SRC:.c=.adb)
+ASM=$(SRC:.c=.asm)
+LNK=$(SRC:.c=.lnk)
+LST=$(SRC:.c=.lst)
+REL=$(SRC:.c=.rel)
+RST=$(SRC:.c=.rst)
+SYM=$(SRC:.c=.sym)
+
+PROGS=timer-flash.ihx timer-ram.ihx
+PCDB=$(PROGS:.ihx=.cdb)
+PLNK=$(PROGS:.ihx=.lnk)
+PMAP=$(PROGS:.ihx=.map)
+PMEM=$(PROGS:.ihx=.mem)
+PAOM=$(PROGS:.ihx=)
+
+%.rel : %.c
+ $(CC) -c $(CFLAGS) -o$*.rel $<
+
+all: $(PROGS)
+
+timer-ram.ihx: $(REL) Makefile
+ $(CC) $(LDFLAGS_RAM) $(CFLAGS) -o timer-ram.ihx $(REL)
+ $(CC) $(LDFLAGS_FLASH) $(CFLAGS) -o timer-flash.ihx $(REL)
+
+timer-flash.ihx: timer-ram.ihx
+
+clean:
+ rm -f $(ADB) $(ASM) $(LNK) $(LST) $(REL) $(RST) $(SYM)
+ rm -f $(PROGS) $(PCDB) $(PLNK) $(PMAP) $(PMEM) $(PAOM)