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diff --git a/private/ntos/inc/ppcdef.h b/private/ntos/inc/ppcdef.h
new file mode 100644
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+++ b/private/ntos/inc/ppcdef.h
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+/*++ BUILD Version: 0005    // Increment this if a change has global effects
+
+Copyright (c) 1990  Microsoft Corporation
+
+Module Name:
+
+    ppcdef.h
+
+Abstract:
+
+    This module is the header file that describes hardware addresses
+    for a Power PC system.
+
+Author:
+
+    David N. Cutler (davec) 26-Nov-1990
+
+Revision History:
+
+    Jim Wooldridge (jimw@austin.vnet.ibm.com) PowerPC port
+
+--*/
+
+
+#ifndef _PPCDEF_
+#define _PPCDEF_
+
+//
+// Define physical base addresses for system mapping.
+//
+
+#define VIDEO_MEMORY_PHYSICAL_BASE 0x000A0000 // physical base of video memory
+#define VIDEO_CONTROL_PHYSICAL_BASE 0x00000000 // physical base of video control
+#define CURSOR_CONTROL_PHYSICAL_BASE 0x00000000 // physical base of cursor control
+#define SCSI_PHYSICAL_BASE     0x00000000  // physical base os SCSI control
+#define FLOPPY_PHYSICAL_BASE   0x000003F0  // physical base of floppy control
+#define RTCLOCK_PHYSICAL_BASE  0x00000071  // physical base of realtime clock
+#define KEYBOARD_PHYSICAL_BASE 0x00000060  // physical base of keyboard control
+#define MOUSE_PHYSICAL_BASE    0x00000060  // physical base of mouse control
+#define SERIAL0_PHYSICAL_BASE  0x000003f8  // physical base of serial port 0
+#define SERIAL1_PHYSICAL_BASE  0x000002f8  // physical base of serial port 1
+#define PARALLEL_PHYSICAL_BASE 0x000003bc  // physical base of parallel port
+#define NVRAM_PHYSICAL_BASE    0x00000074  // physical base of nonvolatile RAM
+#define SOUND_PHYSICAL_BASE    0x00000830  // physical base of sound control
+
+
+#define PCI_MEMORY_PHYSICAL_BASE   0xC0000000 // physical base of PCI Memory space
+
+//
+// Define the size of the DMA translation table.
+//
+
+#define DMA_TRANSLATION_LIMIT 0x1000    // translation table limit
+
+//
+// DMA channel assignments
+//
+
+#define FLOPPY_CHANNEL    0x2             // Floppy DMA channel
+#define CASCADE_CHANNEL   0x4             //
+#define AUDIO_PLAYBACK    0x6             // Sound playback data
+#define AUDIO_CAPTURE     0x7             // Sound Capture Data
+
+
+
+//
+// Define system time increment value.
+//
+
+#define MAXIMUM_INCREMENT      100000             // 10ms.
+#define MINIMUM_INCREMENT       10000             // 1ms.
+
+
+// begin_ntddk begin_nthal
+//
+// Interrupt Request Level definitions
+//
+
+#define PASSIVE_LEVEL    0          // Passive release level
+#define LOW_LEVEL        0          // Lowest interrupt level
+#define APC_LEVEL        1          // APC interrupt level
+#define DISPATCH_LEVEL   2          // Dispatcher level
+
+#define PROFILE_LEVEL   27          // timer used for profiling.
+#define CLOCK1_LEVEL    28          // Interval clock 1 level - Not used on x86
+#define CLOCK2_LEVEL    28          // Interval clock 2 level
+#define IPI_LEVEL       29          // Interprocessor interrupt level
+#define POWER_LEVEL     30          // Power failure level
+#define HIGH_LEVEL      31           // Highest interrupt level
+// end_ntddk
+
+//
+// Define PPC interrupt levels IRQL's
+//
+
+#define MAXIMUM_DEVICE_LEVEL    27
+#define DECREMENTER_LEVEL       CLOCK2_LEVEL
+#define MACHINE_CHECK_LEVEL     HIGH_LEVEL
+
+
+
+//
+// Define kernel dispatch vectors
+//
+#define PMI_VECTOR                3
+#define MACHINE_CHECK_VECTOR      4
+#define EXTERNAL_INTERRUPT_VECTOR 5
+#define DECREMENT_VECTOR          7
+
+
+//
+// Define device interrupt vectors.
+//
+
+#define DEVICE_VECTORS 32
+
+#define PROFILE_VECTOR  (0 + DEVICE_VECTORS)
+
+
+#define TIMER_VECTOR      0
+#define KEYBOARD_VECTOR   1               // Keyboard device interrupt vector
+#define CASCADE_VECTOR    2               // Cascade interrupt vector
+#define SERIAL1_VECTOR    3               // Serial device 2 interrupt vector
+#define SERIAL0_VECTOR    4               // Serial device 1 interrupt vector
+#define PARALLEL_VECTOR   5               // Parallel device interrupt vector
+#define FLOPPY_VECTOR     6               // Floppy device interrupt vector
+#define PARALLEL2_VECTOR  7               // Parallel device 2 interrupt vector
+#define SHORT_INT_VECTOR  7               // Default for short interrupts
+#define RTC_VECTOR        8               // Real time clock interrupt vector
+#define ISA_IRQ9_VECTOR   9               // ISA vector
+#define SOUND_VECTOR      10              // Sound device interrupt vector
+#define ISA_IRQ11_VECTOR  11              // ISA vector
+#define MOUSE_VECTOR      12              // Mouse device interrupt vector
+#define SCSI_VECTOR       13              // SCSI device interrupt vector
+#define ISA_IRQ14_VECTOR  14              // ISA vector
+#define PCI_VECTOR        15              // PCI interrupt vector
+
+#define MAXIMUM_DEVICE_VECTOR (15 + DEVICE_VECTORS) // maximum SIO vector
+
+
+//
+// Define translation table entry structure.
+//
+
+
+typedef struct _TRANSLATION_ENTRY {
+    PVOID VirtualAddress;
+    ULONG PhysicalAddress;
+    ULONG Index;
+} TRANSLATION_ENTRY, *PTRANSLATION_ENTRY;
+
+
+#endif // _PPCDEF_