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diff --git a/qemu/roms/SLOF/clients/net-snk/app/biosemu/debug.h b/qemu/roms/SLOF/clients/net-snk/app/biosemu/debug.h
new file mode 100644
index 000000000..46a026ae6
--- /dev/null
+++ b/qemu/roms/SLOF/clients/net-snk/app/biosemu/debug.h
@@ -0,0 +1,74 @@
+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ *     IBM Corporation - initial implementation
+ *****************************************************************************/
+#ifndef _BIOSEMU_DEBUG_H_
+#define _BIOSEMU_DEBUG_H_
+
+#include <stdio.h>
+#include <stdint.h>
+
+extern uint32_t debug_flags;
+// from x86emu...needed for debugging
+extern void x86emu_dump_xregs(void);
+
+#define DEBUG_IO 0x1
+#define DEBUG_MEM 0x2
+// set this to print messages for certain virtual memory accesses (Interrupt Vectors, ...)
+#define DEBUG_CHECK_VMEM_ACCESS 0x4
+#define DEBUG_INTR 0x8
+#define DEBUG_PRINT_INT10 0x10	// set to have the INT10 routine print characters
+#define DEBUG_VBE 0x20
+#define DEBUG_PMM 0x40
+#define DEBUG_DISK 0x80
+#define DEBUG_PNP 0x100
+
+#define DEBUG_TRACE_X86EMU 0x1000
+// set to enable tracing of JMPs in x86emu
+#define DEBUG_JMP 0x2000
+
+//#define DEBUG
+#ifdef DEBUG
+
+#define CHECK_DBG(_flag) if (debug_flags & _flag)
+
+#define DEBUG_PRINTF(_x...) printf(_x);
+// prints the CS:IP before the printout, NOTE: actually its CS:IP of the _next_ instruction
+// to be executed, since the x86emu advances CS:IP _before_ actually executing an instruction
+#define DEBUG_PRINTF_CS_IP(_x...) DEBUG_PRINTF("%x:%x ", M.x86.R_CS, M.x86.R_IP); DEBUG_PRINTF(_x);
+
+#define DEBUG_PRINTF_IO(_x...) CHECK_DBG(DEBUG_IO) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_MEM(_x...) CHECK_DBG(DEBUG_MEM) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_INTR(_x...) CHECK_DBG(DEBUG_INTR) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_VBE(_x...) CHECK_DBG(DEBUG_VBE) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_PMM(_x...) CHECK_DBG(DEBUG_PMM) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_DISK(_x...) CHECK_DBG(DEBUG_DISK) { DEBUG_PRINTF_CS_IP(_x) }
+#define DEBUG_PRINTF_PNP(_x...) CHECK_DBG(DEBUG_PNP) { DEBUG_PRINTF_CS_IP(_x) }
+
+#else
+
+#define CHECK_DBG(_flag) if (0)
+
+#define DEBUG_PRINTF(_x...)
+#define DEBUG_PRINTF_CS_IP(_x...)
+
+#define DEBUG_PRINTF_IO(_x...)
+#define DEBUG_PRINTF_MEM(_x...)
+#define DEBUG_PRINTF_INTR(_x...)
+#define DEBUG_PRINTF_VBE(_x...)
+#define DEBUG_PRINTF_PMM(_x...)
+#define DEBUG_PRINTF_DISK(_x...)
+#define DEBUG_PRINTF_PNP(_x...)
+
+#endif				//DEBUG
+
+void dump(uint8_t * addr, uint32_t len);
+
+#endif