From 84ff13708eb22677d9820bc6e2fdd2a9cf41b801 Mon Sep 17 00:00:00 2001
From: Jali <jali@orca-central.de>
Date: Sun, 11 Jan 2026 20:40:15 +0100
Subject: [PATCH] Always end TOSIXB with writing a 0 byte

---
 src/sudoku.s | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sudoku.s b/src/sudoku.s
index 063b49f..eb33d79 100644
--- a/src/sudoku.s
+++ b/src/sudoku.s
@@ -78,7 +78,8 @@ TOSLP:  ILDB  D,A                     ;Load the next character from A.
         SUBI  D,40                    ;Convert 32..95 to 0..63
         IDPB  D,B                     ;Deposit the character in the destination.
         JRST  TOSLP                   ;Repeat with next character.
-TOSEN:  POP   P,D                     ;Restore the D register.
+TOSEN:  IDPB  D,[000]                 ;Make sure the last char is 0
+        POP   P,D                     ;Restore the D register.
         POPJ  P,                      ;Return from function.
 
 ;Subroutine to print a string of text on the output.