[hbelusca] 61282: [NTVDM]: Implement BOP_DEBUGGER (see: "Undocumented DOS" by Schulman et al., page 267) which allows you to break into a debugger from a 16-bit app (Vampyre, it can be useful for y...

Author: hbelusca
Date: Mon Dec 16 23:57:35 2013
New Revision: 61282

URL: http://svn.reactos.org/svn/reactos?rev=61282&view=rev
Log:
[NTVDM]: Implement BOP_DEBUGGER (see: "Undocumented DOS" by Schulman et al.,
page 267) which allows you to break into a debugger from a 16-bit app (Vampyre, it can be
useful for you ;) ).

Modified:
    branches/ntvdm/subsystems/ntvdm/emulator.c

Modified: branches/ntvdm/subsystems/ntvdm/emulator.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/emulator…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/emulator.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/emulator.c	[iso-8859-1] Mon Dec 16 23:57:35 2013
@@ -23,6 +23,9 @@
 FAST486_STATE EmulatorContext;
 
 static BOOLEAN A20Line = FALSE;
+
+/* BOP Identifiers */
+#define BOP_DEBUGGER    0x56    // Break into the debugger from a 16-bit app
 
 /* PRIVATE FUNCTIONS **********************************************************/
 
@@ -91,6 +94,12 @@
     return PicGetInterrupt();
 }
 
+VOID WINAPI EmulatorDebugBreak(LPWORD Stack)
+{
+    DPRINT1("NTVDM: BOP_DEBUGGER\n");
+    DebugBreak();
+}
+
 /* PUBLIC FUNCTIONS ***********************************************************/
 
 BOOLEAN EmulatorInitialize(VOID)
@@ -112,6 +121,9 @@
 
     /* Enable interrupts */
     setIF(1);
+
+    /* Register the DebugBreak BOP */
+    RegisterBop(BOP_DEBUGGER, EmulatorDebugBreak);
 
     return TRUE;
 }