Source code of Windows XP (NT5)
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;******************************************************************************;; (C) Copyright MICROSOFT Corp., 1993-1994;; Title: Virtual Flat Device Exported Services;; Version: 2.00;; Date: 8-Nov-1993;; Author: RAP;;------------------------------------------------------------------------------;; Change log:;; DATE REV DESCRIPTION; ----------- --- -----------------------------------------------------------; 08-Nov-1993 RAP Original;;==============================================================================
IFDEF VMM_TRUEBegin_Service_Table VFLATD
VFLATD_Service VFLATD_Get_Version, LOCALVFLATD_Service VFLATD_Unmap_Flat_Selector, LOCAL
End_Service_Table VFLATDENDIF
VflatD_Chicago_ID equ 011Fh ; OEM #8 Device #31VflatD_Windows_ID equ (0440h + 29d) ; MMSYS OEM# device 30
ifdef WIN31VflatD_Device_ID equ VflatD_Windows_IDVflatD_Version equ 0160h ; 1.60elseVflatD_Device_ID equ VflatD_Chicago_IDVflatD_Version equ 0200h ; 2.00endif
;; PM API defines;VflatD_Query equ 0VflatD_Get_Version equ 0VflatD_Get_Sel equ 1VflatD_Reset equ 2VflatD_Create_Virtual_Frame_Buffer equ 3VflatD_Create_Physical_Frame_Buffer equ 4
;******************************************************************************;; VFLATD_PM_API_Query;; DESCRIPTION:; Query VFlatD info;; ENTRY:; Client_DX = 0;; EXIT:; Client_EAX = VFlatD version; Client_EBX = selector to the frame buffer; Client_ECX = size of frame buffer; Client_EDX = Bank size + flags?;;==============================================================================
;******************************************************************************;; VFLATD_PM_API_Get_Video_Base;; DESCRIPTION:; Return a GDT selector to the flat video buffer;; ENTRY:; Client_DX = 1; Client_AX = # of pages of video memory; Client_CX = size of bank switch code; Client_ES:DI -> bank switch code;; EXIT:; Client_AX = Selector to flat video buffer; Client_EDX = Linear base of flat video buffer; Client carry flag clear;;==============================================================================
;******************************************************************************;; VFLATD_PM_API_Create_Physical_Frame_Buffer;; DESCRIPTION:; Return a GDT selector to a flat video buffer;; ENTRY:; Client_DL = 4; Client_DH = flags; Client_EAX = physical base of frame buffer; Client_ECX = size of frame buffer (in bytes);; EXIT:; Client_AX = Selector to flat video buffer; Client_EDX = Linear base of flat video buffer; Client carry flag clear;;==============================================================================
;******************************************************************************;; VFLATD_PM_API_Create_Virtual_Frame_Buffer;; DESCRIPTION:; Return a GDT selector to the flat video buffer;; ENTRY:; Client_DL = 3; Client_DH = flags; Client_EAX = size of frame buffer (in bytes); Client_EBX = size of a bank (in bytes); Client_ESI = location of bank; Client_CX = size of bank switch code; Client_ES:DI = ptr to bank switch code;; EXIT:; Client_AX = Selector to flat video buffer; Client_EDX = Linear base of flat video buffer; Client carry flag clear;;==============================================================================
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