----------------------------------------------------------------------
Patch name: patch.programatic-shutdown
Author: cbothamy@free.fr
Date: 29 July 2002

Detailed description:
  This patch enables the guest OS to stop bochs
  by writing "Shutdown" to port 0x440.

Patch was created with:
  cvs diff -u
Apply patch to what version:
  cvs checked out on 29 July 2002
Instructions:
  To patch, go to main bochs directory.
  Type "patch -p0 < THIS_PATCH_FILE".
----------------------------------------------------------------------
Index: iodev/unmapped.cc
===================================================================
RCS file: /cvsroot/bochs/bochs/iodev/unmapped.cc,v
retrieving revision 1.15
diff -u -r1.15 unmapped.cc
--- iodev/unmapped.cc	1 Apr 2002 21:53:23 -0000	1.15
+++ iodev/unmapped.cc	29 Jul 2002 12:12:46 -0000
@@ -41,6 +41,7 @@
   settype(UNMAPLOG);
   s.port80 = 0x00;
   s.port8e = 0x00;
+  s.shutdown = 0;
 }
 
 bx_unmapped_c::~bx_unmapped_c(void)
@@ -237,6 +238,25 @@
 	    // address, value));
       break;
     
+    case 0x8900: // Shutdown port, could be moved in a PM device
+                 // or a host <-> guest communication device 
+      switch (value) {
+        case 'S': if (BX_UM_THIS s.shutdown == 0) BX_UM_THIS s.shutdown = 1; break;
+        case 'h': if (BX_UM_THIS s.shutdown == 1) BX_UM_THIS s.shutdown = 2; break;
+        case 'u': if (BX_UM_THIS s.shutdown == 2) BX_UM_THIS s.shutdown = 3; break;
+        case 't': if (BX_UM_THIS s.shutdown == 3) BX_UM_THIS s.shutdown = 4; break;
+        case 'd': if (BX_UM_THIS s.shutdown == 4) BX_UM_THIS s.shutdown = 5; break;
+        case 'o': if (BX_UM_THIS s.shutdown == 5) BX_UM_THIS s.shutdown = 6; break;
+        case 'w': if (BX_UM_THIS s.shutdown == 6) BX_UM_THIS s.shutdown = 7; break;
+        case 'n': if (BX_UM_THIS s.shutdown == 7) BX_UM_THIS s.shutdown = 8; break;
+	default :  BX_UM_THIS s.shutdown = 0; break;
+        }
+      if (BX_UM_THIS s.shutdown == 8) {
+        BX_INFO(("Shutdown port: shutdown requested"));
+        BX_CPU(0)->kill_bochs_request = 2;
+        }
+      break;
+
     case 0xfedc:
       bx_dbg.debugger = (value > 0);
 		BX_DEBUG(( "DEBUGGER = %u", (unsigned) bx_dbg.debugger));
Index: iodev/unmapped.h
===================================================================
RCS file: /cvsroot/bochs/bochs/iodev/unmapped.h,v
retrieving revision 1.7
diff -u -r1.7 unmapped.h
--- iodev/unmapped.h	1 Apr 2002 21:57:51 -0000	1.7
+++ iodev/unmapped.h	29 Jul 2002 12:12:46 -0000
@@ -55,6 +55,7 @@
   struct {
     Bit8u port80;
     Bit8u port8e;
+    Bit8u shutdown;
     } s;  // state information
 
   bx_devices_c *devices;