move some things from targettest to samples

targettest/gamate/Makefile

@@ -1,4 +1,8 @@
 
+# Run 'make SYS=<target>'; or, set a SYS env.
+# var. to build for another target system.
+SYS ?= gamate
+
 # Just the usual way to find out if we're
 # using cmd.exe to execute make rules.
 ifneq ($(shell echo),)
@@ -51,9 +55,6 @@ lcdtest.bin: lcdtest.s
 	$(CL) -l lcdtest.lst -t gamate -o lcdtest.bin lcdtest.s
 ctest.bin: ctest.c
 	$(CL) -l ctest.lst -t gamate -o ctest.bin ctest.c
-nachtm.bin: nachtm.c
-	$(CL) -Os -l nachtm.lst -t gamate -o nachtm.bin nachtm.c
-	gamate-fixcart nachtm.bin
 
 clean:
 	@$(DEL) lcdtest.o audiotest.o ctest.o 2>$(NULLDEV)