From 5fa20c396389105516d63fe26e25fcfef972e33c Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Thu, 3 Aug 2023 15:53:59 +0100
Subject: [PATCH] Assembler: always add an END at the end of the output

---
 assembler.js                | 4 ++++
 readme.md                   | 4 +++-
 test-programs/constants.asm | 3 +--
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/assembler.js b/assembler.js
index bccf98d..35895b6 100644
--- a/assembler.js
+++ b/assembler.js
@@ -181,6 +181,10 @@ function decodeInstructions(str) {
     }
   }
 
+  // Add an END at the end
+  machineCode.push('0');
+  machineCode.push('0'); 
+
   return new Uint8Array(machineCode);
 }
 
diff --git a/readme.md b/readme.md
index bc286bd..eb9ee32 100644
--- a/readme.md
+++ b/readme.md
@@ -10,7 +10,9 @@
 
 ### Features
 
-- [ ] Assembler: pad to 256 bytes, OR, to start, always add an END
+- [ ] Assembler:
+    - [x] Always add an END at the end
+    - [ ] Pad up to 256 bytes
 - [x] Add constants to assembler
 - [ ] Keypad
 - [ ] Add single-stepping 
diff --git a/test-programs/constants.asm b/test-programs/constants.asm
index ddc5ed6..c6c501e 100644
--- a/test-programs/constants.asm
+++ b/test-programs/constants.asm
@@ -3,5 +3,4 @@
 =bar $02
 ADD =foo
 STO =bar
-STO (=bar)
-END
\ No newline at end of file
+STO (=bar)
\ No newline at end of file