182 lines
5.3 KiB
NASM
182 lines
5.3 KiB
NASM
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PAGE ,132
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TITLE DXOEM.ASM -- Dos Extender OEM Interface
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; Copyright (c) Microsoft Corporation 1988-1991. All Rights Reserved.
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;***********************************************************************
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;
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; DXOEM.ASM - DOS Extender OEM Interface
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;
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;-----------------------------------------------------------------------
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;
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; This module contains the routines that may need to be modified by OEMs
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; when adding new device/interface support to the Microsoft 286 DOS
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; Extender portion of Windows/286. There are four routines contained
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; in this module:
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;
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; InitializeOEM - called during DOSX initialization
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;
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; SuspendOEM - called when the protected mode app is about
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; to be suspended (currently when running a
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; standard DOS 'old' app from Windows).
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;
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; ResumeOEM - called when the protected mode app is about
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; to be resumed (currently when returning from
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; a standard DOS 'old' app to Windows).
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;
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; TerminateOEM - called during DOSX termination
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;
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; Note: when this module refers to the 'OEM layer,' it is refering to
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; the 286 DOS Extender device drivers, API mappers, etc., not the
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; Windows OEM layer.
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;
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;-----------------------------------------------------------------------
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;
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; 06/28/89 jimmat Original version.
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; 11/29/90 amitc Removed SuspendOEM/ResumeOEM - not required for 3.1
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; 11/29/90 amitc Moved call to 'InitLowHeap' from here to DXNETBIO.ASM
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;
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;***********************************************************************
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.286p
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; -------------------------------------------------------
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; INCLUDE FILE DEFINITIONS
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; -------------------------------------------------------
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.xlist
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.sall
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include segdefs.inc
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include gendefs.inc
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include pmdefs.inc
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.list
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; -------------------------------------------------------
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; GENERAL SYMBOL DEFINITIONS
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; -------------------------------------------------------
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; -------------------------------------------------------
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; EXTERNAL SYMBOL DEFINITIONS
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; -------------------------------------------------------
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extrn InitNetMapper:NEAR
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extrn TermNetMapper:NEAR
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; -------------------------------------------------------
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; DATA SEGMENT DEFINITIONS
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; -------------------------------------------------------
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DXDATA segment
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extrn NetHeapSize:WORD
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DXDATA ends
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; -------------------------------------------------------
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; CODE SEGMENT VARIABLES
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; -------------------------------------------------------
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DXCODE segment
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DXCODE ends
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DXPMCODE segment
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DXPMCODE ends
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; -------------------------------------------------------
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subttl OEM Initialization Routine
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page
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; -------------------------------------------------------
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; OEM INITIALIZATION ROUTINE
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; -------------------------------------------------------
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DXPMCODE segment
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assume cs:DXPMCODE
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;--------------------------------------------------------
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; InitializeOEM -- This routine is called during DOSX initialization
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; in order to initialize the OEM layer (device drivers, API
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; mappers, etc.). It expectes to be called late enough in the
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; initialization process that other interrupt mapping functions
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; (like Int 21h) are available.
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;
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; This routine is called in protected mode, and can enable/disable
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; interrupts if it so requires.
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;
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; Input: none
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; Output: none
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; Errors: none
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; Uses: ax, all others preserved
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assume ds:DGROUP,es:NOTHING,ss:NOTHING
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public InitializeOEM
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InitializeOEM proc near
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; Initialize the NetBios mapper.
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; ;;bugbug NetHeapSize isn't actually being used, other
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; ;; than possibly to turn off the NETBIOS mapper
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mov ax,NetHeapSize ;don't initialize if net heap
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or ax,ax ; size set to zero
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jz @f
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call InitNetMapper ;initialize the NetBIOS mapper--CY set
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; if NetBIOS not installed
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@@:
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ret
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InitializeOEM endp
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; -------------------------------------------------------
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DXPMCODE ends
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; -------------------------------------------------------
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subttl OEM Termination Routine
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page
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; -------------------------------------------------------
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; OEM TERMINATION ROUTINE
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; -------------------------------------------------------
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DXCODE segment
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assume cs:DXCODE
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; -------------------------------------------------------
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; TerminateOEM -- This routine is called during DOSX termination
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; to disable the OEM layer.
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;
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; Note: This routine must is called in REAL MODE! If some termination
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; code must run in protected mode, the routine must switch to
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; protected mode itself, and switch back to real mode before
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; returning.
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;
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; Input: none
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; Output: none
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; Errors: none
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; Uses: ax,bx,cx,dx,si,di,es
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;
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assume ds:DGROUP,es:NOTHING,ss:NOTHING
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public TerminateOEM
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TerminateOEM proc near
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call TermNetMapper ;terminate the NetBIOS mapper
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ret
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TerminateOEM endp
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; -------------------------------------------------------
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DXCODE ends
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;****************************************************************
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end
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