preparing to do a cp/m cleanup

i wrote most of this up to here on a linux laptop, but some
changes need to be made to get it working with CP/M-80.

Makefile

@@ -1,6 +1,6 @@
-TARGETS := test undump
-LIBS := binary.pas ihex.pas
-FPC_FLAGS := -g
+TARGETS := test dump undump
+LIBS := binary.pas common.pas ihex.pas
+FPC_FLAGS := -g -Mtp
 FPC := fpc $(FPC_FLAGS)
 
 .PHONY: all
@@ -13,6 +13,9 @@ clean:
 test: test.pas $(LIBS)
 	$(FPC) $@.pas
 
-undump: undump.pas binary.pas ihex.pas
+undump: undump.pas $(LIBS)
+	$(FPC) $@.pas
+
+dump: dump.pas $(LIBS)
 	$(FPC) $@.pas