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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.
Although both technologies are similar, 32-bit disk access was introduced with Windows 3.1 and file access with 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 ...
This contrasts with earlier versions of Windows which rely on MS-DOS to perform file and disk access (Windows for Workgroups 3.11 could also largely bypass MS-DOS when 32-bit file access and 32-bit disk access were enabled). Keeping MS-DOS in memory allows Windows 95 to use DOS device drivers when suitable Windows drivers are unavailable.
Windows 3.1 with enhanced networking; designed to work particularly well as a client with the new Windows NT. [4] [5] Snowball — Windows for Workgroups 3.11: An updated version of Windows for Workgroups 3.1, which introduces 32-bit file access and network improvements. It also removes the Standard Mode, effectively dropping support for 16-bit ...
The Windows 9x kernel is a 32-bit kernel with virtual memory. Drivers are provided by .VXD files or, since Windows 98, the newer WDM drivers can be used. [2] However, the MS-DOS kernel stays resident in memory. Windows will use the old MS-DOS 16-bit drivers if they are installed, except on Windows Me. In Windows Me, DOS is still running, but ...
Flat thunks allowed 32-bit code to call into 16-bit libraries, and the scheme was used extensively inside Windows 95's libraries to avoid porting the whole OS to Win32 in one batch. In Windows NT, the OS was pure 32-bit, except parts for compatibility with 16-bit applications, and only generic thunks were available to thunk from Win16 to Win32 ...
A 32-bit protected-mode MS-DOS kernel based on Windows' 386 enhanced-mode kernel: Windows 95 VMM "Panther" [5] June 1993: The 32-bit Windows subsystem that could run on top of "Cougar" implementing a subset of Windows NT's Win32 API, but a superset of the Win32s API. Windows 95 "Rover" [5] June 1993: Windows for Mobile Computing, based on "Panther"
The maximum amount of supported physical random-access memory (RAM) in Windows NT 4.0 is 4 GB, [34] which is the maximum possible for a 32-bit operating system that does not support PAE. [35] By comparison, Windows 95 fails to boot on computers with more than approximately 480 MB of memory.