Add 83 ASM detection

Author: kg583

tests/data/var/ZLOAD.83P

@@ -206,12 +206,17 @@ def test_protection(self):
             file.seek(55)
             self.assertEqual(test_program.bytes(), file.read()[:-2])
 
-    def test_doors(self):
+    def test_assembly(self):
         test_program = TIProgram.open("tests/data/var/COLORZ.8xp")
         self.assertEqual(type(test_program), TIProtectedAsmProgram)
 
         self.assertEqual(test_program.decode(test_program.data[:26]), "Disp \"Needs Doors CSE\"")
 
+        test_program = TIProgram.open("tests/data/var/ZLOAD.83P")
+        self.assertEqual(type(test_program), TIAsmProgram)
+
+        self.assertEqual(test_program.string()[-12:], "End\n0000\nEnd")
+
     def test_modes(self):
         interpolation = "A and B:Disp \"A and B\":Send(\"SET SOUND eval(A and B) TIME 2"
         names = "Disp \"WHITE,ʟWHITE,prgmWHITE\",WHITE,ʟWHITE:prgmWHITE:prgmABCDEF"

tests/tivars.py

@@ -418,15 +418,16 @@ def coerce(self):
             simplefilter("error")
 
             try:
-                self.string()
+                asm_83 = self.string().endswith("End\n0000\nEnd")
                 doors = False
 
             except BytesWarning:
+                asm_83 = False
                 doors = True
 
         doors &= b"\xEF\x68" in self.data and self.data.index(b"\xEF\x68") > 0
 
-        match self.type_id, any(token in self.data for token in self.asm_tokens) | doors:
+        match self.type_id, any(token in self.data for token in self.asm_tokens) | asm_83 | doors:
             case TIProgram.type_id, False:
                 self.__class__ = TIProgram
             case TIProgram.type_id, True: