From 764b13844ea12c564c127a38938c5c8f0b417377 Mon Sep 17 00:00:00 2001
From: zsknight <>
Date: Tue, 22 May 2001 03:28:10 +0000
Subject: [PATCH] 512 byte header detection refinement

---
 zsnes/src/init.asm | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/zsnes/src/init.asm b/zsnes/src/init.asm
index ef3e995d..95aa86b6 100644
--- a/zsnes/src/init.asm
+++ b/zsnes/src/init.asm
@@ -4268,19 +4268,15 @@ NEWSYM loadfileGUI
     or eax,eax
     jz near .success2
     add dword[.curromspace],eax
-    mov ecx,eax
-;    shr eax,15
-;    shl eax,15
     mov esi,[headdata]
     add esi,[.curfileofs]
     mov edi,[headdata]
     add edi,[.curfileofs]
     add [.curfileofs],eax
-    sub ecx,eax
-;    xor ecx,ecx
-;    or ecx,ecx
-
-
+    mov ecx,eax
+    and ecx,32767
+    cmp ecx,512
+    je near .yesheader
     ; check if .smc header
     push esi
     push eax
@@ -4300,6 +4296,7 @@ NEWSYM loadfileGUI
     pop esi
     cmp ecx,450
     jb .nomove
+.yesheader
     mov byte[Header512],1
     mov edi,esi
     add edi,512