Add a custom entry point to the user code

The routine does not have to start from the first byte of machine code

code.asm

@@ -1,2 +1,12 @@
+; This is the main file you will edit to add your machine code to the REM statement.
+; You _must_ include the "entry_point" tag to point to the address which will called by the BASIC "PRINT USR" statement.
+; The default code below is for illustration only, and can be deleted.
+; But REMEMBER TO ADD THE entry_point TAG TO YOUR OWN CODE!
+
+
+data_start:		;if your routine starts here, move the entry_point tag here too
 	ld bc, 42
 	ret
+
+entry_point:		;move this tag to the start point of your code
+	jr data_start

remload.asm

@@ -45,7 +45,7 @@ printusr:
 	db "0"		;don't know if actual value is important
 	db #0e
 	db 0,0
-	dw code		;actual call to REM statement code
+	dw entry_point	;actual call to REM statement code
 	db 0
 	db ':'