From 77c065f972ffdd7af2ec87247b3113eab793d611 Mon Sep 17 00:00:00 2001
From: leslie <unknown>
Date: Sat, 5 Jan 2008 11:51:27 +0100
Subject: [PATCH] nagra: add NX protection to emu

---
 systems/nagra/cpu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/systems/nagra/cpu.c b/systems/nagra/cpu.c
index c84dd4d..b4b34c0 100644
--- a/systems/nagra/cpu.c
+++ b/systems/nagra/cpu.c
@@ -405,6 +405,10 @@ int c6805::Run(int max_count)
       PRINTF(L_SYS_EMU,"stack underflow (count=%d)",count);
       return 1;
       }
+    if(pc>0x0400 && mapMap[pc+PAGEOFF(pc,cr)]==0) {
+      PRINTF(L_SYS_EMU,"NX protection at %04x (count=%d)",pc,count);
+      return 1;
+      }
     count++;
 
     if(!LOG(L_SYS_DISASM) && LOG(L_SYS_DISASM80)) {
@@ -977,9 +981,11 @@ int c6805::Run(int max_count)
       case 0x31:
       case 0x32:
         PRINTF(L_SYS_EMU,"pre-byte %02x in command decoding (count=%d)",ins,count);
+        loglb->cLineBuff::Flush();
         return 3;
       default:
         PRINTF(L_SYS_EMU,"unsupported instruction 0x%02x (count=%d)",ins,count);
+        loglb->cLineBuff::Flush();
         return 3;
       }
 
-- 
2.39.5