From 683ccfc78ffb621bdf3265d4c10d517ac285aa48 Mon Sep 17 00:00:00 2001
From: hidnplayr <hidnplayr@kolibrios.org>
Date: Thu, 30 Sep 2021 16:36:29 +0000
Subject: [PATCH] Bugfix from 'Jurgen' for repne scasw / repnz stosw and
 handling of unknown/invalid opcodes. See
 https://board.kolibrios.org/viewtopic.php?p=77209#p77209 for details.

git-svn-id: svn://kolibrios.org@9209 a494cfbc-eb01-0410-851d-a64ba20cac60
---
 programs/develop/mtdbg/disasm.inc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/programs/develop/mtdbg/disasm.inc b/programs/develop/mtdbg/disasm.inc
index 7f3292a0a5..44d1b6c465 100644
--- a/programs/develop/mtdbg/disasm.inc
+++ b/programs/develop/mtdbg/disasm.inc
@@ -264,8 +264,8 @@ crep:
         cmp     al, 0x6E
         jz      .prefix
 
-    .noprefix:
         pop     [disasm_cur_pos]
+    .noprefix:
         and     byte [edi-1], 0
         ret
 
@@ -328,6 +328,10 @@ crepnz:
         mov     al, ' '
         stosb
         movzx   eax, dl
+        cmp     al, 66h
+        je      c66
+        cmp     al, 67h
+        je      c67
         cmp     al, 0x6C
         jb      crep.noprefix
         cmp     al, 0x6F