- VxD
Unreferenced date September 2007 VxD is the device driver model used in Windows 2.1x Microsoft Windows 386 , the 386 enhanced mode of Windows 3.1x Windows 3.x , and Windows 9x . VxDs have access to the memory of the kernel and all running processes, as well as raw access to the hardware. TOC Design The name VxD is an abbreviation for virtual xxx driver , where xxx is some class of hardware device. It derives from the fact that most drivers had filenames of the form code vxxxd.386 code in Windows 3.1x Windows 3.x . Some examples are vjoyd.386 joystick , vmm.386 memory manager . VxDs usually have the filename extension code .386 code under Windows 3.x and code .vxd code under Windows 95. VxDs written for Windows 3.x can be used under Windows 95 but not vice versa. History Prior to the advent of Windows, DOS applications would either communicate directly with the various pieces of hardware responding to interrupts, reading and writing device memory etc. or go through a DOS device driver . As DOS was not multitasking each application would have exclusive and complete control over the hardware while running. Though Microsoft Windows Windows applications don t often communicate directly with hardware, it was the only way to write Windows drivers, and still is in the real and standard modes of Windows 3.x. Despite the fact that Windows switched from running in real mode to protected mode, direct hardware access and interrupt hooking could still be done because when Windows switched to running in protected mode it kept the single privilege level model used in real mode. This lasted all the way through Windows 9x. Windows 386 and onwards allowed multiple DOS applications to execute ... Model , VxD device drivers can be used under Windows 98 and Windows Me. VxDs are not usable in Windows ... for them. Using VxD drivers instead of WDM drivers in Windows 9x resulted in advanced ACPI .... Category Device drivers Category Windows components windows stub de VxD es VxD fr VxD ko VxD ja ... more details
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- Virtual device driver
A device driver handling a Device driver Virtual device drivers virtual device . VxD , a type of Windows device driver running in 32 bit protected mode. disambiguation ... more details
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- .sys
Other uses System file disambiguation .sys is a filename extension in Microsoft Windows and DOS type operating system . Most tt .sys tt files are real mode device driver s. ref http www.osronline.com article.cfm?article 233 Exactly What Is A Driver? ref Certain files using this extension are not, however MSDOS.SYS and IO.SYS are core operating system files in MS DOS and Windows 9x. The CONFIG.SYS file contains various configuration options as well as specifying what device drivers will be loaded . ref http support.microsoft.com kb 118579 Contents of the Windows Msdos.sys File ref ref http www.dewassoc.com support msdos config sys.htm What is a CONFIG.SYS FILE? ref References reflist See also VxD Category Microsoft Windows Sys Category DOS on IBM PC compatibles Sys Windows stub el .sys ko .sys pt SYS ru .sys sv SYS vi .sys ... more details
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- Windows Driver Model
filter driver implemented as a Windows service that enables applications to work with devices. VxD ... Edition , and Windows Me are able to use both WDM and VxD Virtual device driver driver standards. Both ... the newer WDM standard provides more features. For example, if a TV tuner card using a VxD driver is able ... a significant improvement over the VxD and Windows NT driver model used before it, has been criticised ... more details
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- 32-bit file access
No footnotes date March 2010 32 bit file access refers to the higher performance, protected mode disk caching method introduced in Windows for Workgroups 3.11, which replaced SmartDrive Smartdrv . It bypassed MS DOS and directly accessed the disk, either via the BIOS or preferably 32 bit disk access Windows native protected mode disk drivers . This feature was a backport from the then unreleased Windows 95 , as suggested by Microsoft s advertisements for Windows for Workgroups 3.11 the 32 bit file system from our Chicago project . With the introduction of 32 bit file access and Long File Names in Windows 95, DOS was reduced to the role of a boot loader for Windows. It was implemented using the File Allocation Table Long File Names .28VFAT.2C LFNs.29 VFAT , VCACHE, and IFSHLP.SYS IFSMgr VxD drivers. Also, it should not be confused with 32 bit disk access . Although both technologies are similar, 32 bit disk access also known as FastDisk pre dates Windows for Workgroups 3.11. 32 bit file access provided a 32 bit code path for Windows to directly access the disk bus by intercepting the MS DOS Int 21H services while remaining in 386 protected mode and at CPU speeds, rather than handling the Int 21H services in real mode by MS DOS. 32 bit disk access relatively offers less performance and is less likely to work on many computers than 32 bit file access. 32 bit file access does not need 32 bit disk access. See also 32 bit disk access External links http web.archive.org web 20071011012746 http marina.mfarris.com theref files 32bfa.txt MS Windows 32 Bit File Access Meta FAQ http users.exis.net gewkab 32bfafaq.html 32 bit file access FAQs http support.microsoft.com ?id 83325 Explanation of SMARTDRV & 32 bit disk access from Microsoft http support.microsoft.com kb 106275 Windows for Workgroups 3.11 FAQs http pclt.cis.yale.edu pclt OPSYS WFWG311.HTM Category Microsoft Windows file system technology Category Windows disk file systems windows stub ... more details
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- Windows startup process
The Windows Startup Process is the process by which Microsoft s Microsoft Windows Windows series of operating system s initializes. DOS based Windows Windows 1.x 2.x In Windows versions 1.01 to Windows 386, the system was loaded when WIN.COM was executed. It then loaded win100.bin win200.bin and win100.ovl win200.ovl, along with the configuration settings file WIN.INI . The default shell is the MS DOS Executive . The modules GDI.EXE, KERNEL.EXE and USER.EXE, fonts, and the various device drivers such as comm.drv, mouse.drv, keyboard.drv are incorporated in win100.bin win200.bin and win100.ovl win200.ovl. Windows 3.x 9x In Windows 3.1x Windows 3.x and Windows 9x 95 98 ME , the boot loader phase is handled by MS DOS . During the boot phase, the Autoexec.bat and Config.sys are executed, along with the configuration settings files WIN.INI and SYSTEM.INI . Virtual device drivers are also loaded in the startup process they are most commonly loaded from the registry HKLM System CurrentControlSet Services VxD or from the SYSTEM.INI file. When all system configuration files and device drivers have been loaded, the 16 bit modules, krnl386.exe, gdi.exe, and user.exe, are loaded, then the 32 bit DLLs kernel32.dll, gdi32.dll, and user32.dll are loaded. The 32 bit VxD message server Msgsrv32 starts Mprexe.exe, which is responsible for loading the network logon client such as Client for Microsoft Networks, Microsoft Family Logon or Windows Logon . When a user is logging on to Windows, the startup sound is played, the shell usually Explorer.exe is loaded from the boot section of the SYSTEM.INI file, and startup items are loaded. In all DOS based versions of Windows except ME, it is also possible to load Windows by booting to a DOS prompt and typing win . There are some command line switches that can be used with the Win command with the d switch, Windows boots to safe mode, and with the d n switch, Windows boots to safe mode with networking. The latter switch only works properly wi ... more details
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- Hard trance
VXD DJ Major Tom DJ Kamui Nish artist Nish Ricky T Adrenaline Dept. Emilio Bas & Ram Dave Joy S.H.O.K.K ... more details
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- Digital waveguide synthesis
95, 98, 98SE, and ME, and then only when using . VxD drivers, not . Windows Driver Model WDM ... with any sound card again, the VL part only worked on Windows 95, 98, 98SE, and ME it emulated a .VxD ... more details
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- Win32 console
conagent.exe code then calls Vcond which is a VxD . Vcond then had to pass the keyboard input to the System ... more details
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- Yamaha YMF7xx
9x Me can also use the XG tone generator. All of these features are available using Yamaha s VxD ... more details
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- MSConfig
or disable static VxD virtual device drivers to be loaded at startup, the Environment tab allows ... more details
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- System Controller Hub
cleanup date November 2010 TOC right System Controller Hub SCH is a family of Intel Corporation Intel integrated circuit microchip s employed in chipset s for low power Intel Atom Atom based platforms. Its architecture is consistent with the Intel Hub Architecture but combines the traditional northbridge computing northbridge and southbridge computing southbridge functions into a single integrated circuit microchip . Poulsbo Poulsbo is the codename of the first SCH and plays a key role in Intel Corporation Intel s second generation Menlow Ultra Mobile PC UMPC and mobile Internet device MID platform chipset for Intel Atom Atom Silverthorne microprocessor Silverthorne microprocessors. ref Citation title Intel introduces ultra mobile PC platform date 2007 04 18 publisher The Register url http www.reghardware.co.uk 2007 04 18 intel intros ump accessdate 2010 07 20 ref ref Citation title Poulsbo Chipset publisher Intel Corporation Intel date 2008 10 09 url http software.intel.com en us articles poulsbo chipset accessdate 2010 07 20 ref . The graphics core is called GMA 500 and unlike most graphics cores used by Intel was developed by Imagination Technologies . Intel licensed the PowerVR Series5 SGX PowerVR SGX 535 as a graphics core and the PowerVR VXD for H.264 MPEG 4 AVC playback. The video core is able to process 720p as well as 1080i resolutions. ref Citation title Renesas Licenses Third POWERVR SGX Core date 2008 04 08 publisher Imagination Technologies url http www.imgtec.com corporate newsdetail.asp?NewsID 371 accessdate 2010 07 20 ref This has the following variations ref Citation title Products Formerly Poulsbo publisher Intel Corporation Intel url http ark.intel.com ProductCollection.aspx?codeName 24973 accessdate 2010 07 20 ref http ark.intel.com Product.aspx?id 35450 SCH UL11L http ark.intel.com Product.aspx?id 35447 SCH US15L http ark.intel.com Product.aspx?id 35444 SCH US15W http ark.intel.com Product.aspx?id 41242 SCH US15WP http ark.intel.com Product.aspx ... more details
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- Physical modelling synthesis
.VxD drivers required for VL support of the DX XG chipsets, these would work only on pre NT kernel versions ... XG, wave audio, and 3D gaming sound capabilities of the chipset. Unfortunately, only the VxD Virtual ... more details
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- Windows 98
98 was released, and most hardware producers continued to develop drivers for the older VxD driver ... later, mostly through Windows 2000 and Windows XP , as they are not compatible with the older VxD standard. ref http support.microsoft.com kb 244601 You cannot use virtual device driver .vxd files common ... future versions of Windows. Device driver access in WDM is actually implemented through a VxD device ... Model WDM drivers non VxD drivers. However, there are hibernation issues with the FAT32 file system ... more details
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- Software synthesizer
is a VxD Win98 or WDM WinXP driver which emulates a synthesizer by utilizing the CPU to process MIDI ... more details
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- SoftRAM
to do. ref name Placebo forte In fact, the data passed through the VxD completely unaltered ... more details
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- CBOE DJIA BuyWrite Index
BXD and the CBOE DJIA Volatility Index VXD for Asset Allocation and Diversification Purposes. The paper ... more details
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- SiS 630/730
chipset . The Windows 95 VxD drivers take advantage of the hardware acceleration, and there is also ... more details
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- Blue Screen of Death
of some other serious fault such as an unhandled error occurring inside a VxD hardware driver ... more details
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- PowerVR
. PowerVR Video Cores MVED VXD and Video Display Cores PDP PowerVR s PDP series is used in some HDTV ... more details
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- List of PowerVR products
Lite FPU ARM1176 Thinkware iNAVI K2 Digital Cube iStation T5 APSI LM480 PowerVR Video Cores MVED VXD ... more details
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- X86 virtualization
in a coherent way that detects code patching used in VxD s for instance , the reuse of pages by the guest ... more details
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- Diamond Multimedia
a cleaner user interface. None of these DVD kits are DirectX compatible and as the drivers are the VxD ... more details
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- Steven McGeady
s Display Control Interface and VXD graphics software, later licensed to Microsoft to form the core ... more details
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- H.264/MPEG-4 AVC products and implementations
H3llBot ref Imagination Technologies Ltd. licensable IP cores for SoC development. VXD 370 HD Decoder ... Technologies POWERVR VXD Video Decoder Family Chips&Media has been developed multi standard video ... more details
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