Simplify build by adapting checksum program

This now prepends length bytes as well as adding checksum

Makefile

@@ -1,33 +1,28 @@
-program.tap: program.asm headerbincs body.tap
-	pasmo program.asm program.tap
+program.tap: header.block body.block
+	cat header.block body.block > program.tap
 
-headerbincs: headerbin ac
-	cp headerbin headerbincs
-	./ac headerbincs
+header.block: header ttttt
+	./ttttt header
 
-headerbin: header.tap
-	dd if=header.tap of=headerbin bs=1 count=18
+header: header.asm body.block
+	pasmo header.asm headerlong
+	dd if=headerlong of=header bs=18 count=1
+	rm -f headerlong
 
-header.tap: header.asm body.tap
-	pasmo header.asm header.tap
+body.block: body ttttt
+	./ttttt body
 
-body.tap: body.asm bodybincs
-	pasmo body.asm body.tap
+body: remload.asm code.asm
+	pasmo remload.asm body
 
-bodybincs: bodybin ac
-	cp bodybin bodybincs
-	./ac bodybincs
-
-bodybin: remload.asm code.asm
-	pasmo remload.asm bodybin
-
-ac: append_checksum.c
-	cc append_checksum.c -o ac
+ttttt: ttttt.c
+	cc ttttt.c -o ttttt
 
 clean:
 	rm -f *.tap
-	rm -f *bin
-	rm -f *bincs
-	rm -f ac
+	rm -f *.block
+	rm -f body
+	rm -f header
+	rm -f ttttt
 
 .PHONY: clean