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diff --git a/private/ntos/nthals/halx86/i386/ixisa.h b/private/ntos/nthals/halx86/i386/ixisa.h
new file mode 100644
index 000000000..1389962b9
--- /dev/null
+++ b/private/ntos/nthals/halx86/i386/ixisa.h
@@ -0,0 +1,110 @@
+/*++ BUILD Version: 0001    // Increment this if a change has global effects
+
+Copyright (c) 1991  Microsoft Corporation
+
+Module Name:
+
+    ixisa.h
+
+Abstract:
+
+    This header file defines the private Hardware Architecture Layer (HAL)
+    EISA/ISA specific interfaces, defines and structures.
+
+Author:
+
+    Jeff Havens (jhavens) 20-Jun-91
+
+Revision History:
+
+--*/
+
+#ifndef _IXISA_
+#define _IXISA_
+
+
+//
+// The MAXIMUM_MAP_BUFFER_SIZE defines the maximum map buffers which the system
+// will allocate for devices which require phyically contigous buffers.
+//
+
+#define MAXIMUM_MAP_BUFFER_SIZE  0x40000
+
+//
+// Define the initial buffer allocation size for a map buffers for systems with
+// no memory which has a physical address greater than MAXIMUM_PHYSICAL_ADDRESS.
+//
+
+#define INITIAL_MAP_BUFFER_SMALL_SIZE 0x10000
+
+//
+// Define the initial buffer allocation size for a map buffers for systems with
+// no memory which has a physical address greater than MAXIMUM_PHYSICAL_ADDRESS.
+//
+
+#define INITIAL_MAP_BUFFER_LARGE_SIZE 0x30000
+
+//
+// Define the incremental buffer allocation for a map buffers.
+//
+
+#define INCREMENT_MAP_BUFFER_SIZE 0x10000
+
+//
+// Define the maximum number of map registers that can be requested at one time
+// if actual map registers are required for the transfer.
+//
+
+#define MAXIMUM_ISA_MAP_REGISTER  16
+
+//
+// Define the maximum physical address which can be handled by an Isa card.
+//
+
+#define MAXIMUM_PHYSICAL_ADDRESS 0x01000000
+
+//
+// Define the scatter/gather flag for the Map Register Base.
+//
+
+#define NO_SCATTER_GATHER 0x00000001
+
+//
+// Define the copy buffer flag for the index.
+//
+
+#define COPY_BUFFER 0XFFFFFFFF
+
+//
+// Define adapter object structure.
+//
+
+typedef struct _ADAPTER_OBJECT {
+    CSHORT Type;
+    CSHORT Size;
+    struct _ADAPTER_OBJECT *MasterAdapter;
+    ULONG MapRegistersPerChannel;
+    PVOID AdapterBaseVa;
+    PVOID MapRegisterBase;
+    ULONG NumberOfMapRegisters;
+    ULONG CommittedMapRegisters;
+    struct _WAIT_CONTEXT_BLOCK *CurrentWcb;
+    KDEVICE_QUEUE ChannelWaitQueue;
+    PKDEVICE_QUEUE RegisterWaitQueue;
+    LIST_ENTRY AdapterQueue;
+    KSPIN_LOCK SpinLock;
+    PRTL_BITMAP MapRegisters;
+    PUCHAR PagePort;
+    UCHAR ChannelNumber;
+    UCHAR AdapterNumber;
+    USHORT DmaPortAddress;
+    UCHAR AdapterMode;
+    BOOLEAN NeedsMapRegisters;
+    BOOLEAN MasterDevice;
+    BOOLEAN Width16Bits;
+    BOOLEAN ScatterGather;
+    BOOLEAN IgnoreCount;
+    BOOLEAN Dma32BitAddresses;
+} ADAPTER_OBJECT;
+
+#endif // _IXISA_