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Microsoft advertised DoubleSpace on the cover of MS-DOS 6 distributions (user's guide for MS-DOS 6 with Windows 3.1 pack-in pictured, DoubleSpace sticker top-right). In the most common usage scenario, the user would have one hard drive in the computer, with all the space allocated to one partition (usually as drive C:).
Most of the Double Tools utilities worked from Microsoft Windows, providing a graphical view and control panel of the compressed drives on the computer (the utilities supplied with MS-DOS only operated from DOS-mode). Double Tools also contained a number of disk checking and rescue/recovery utilities.
The version included with MS-DOS 4 and PC DOS 4 is no longer a simple command-line utility, but a full-fledged installer. The command is available in MS-DOS versions 3.3 and 4 and IBM PC DOS releases 3 through 4. [1] This command is no longer included in DOS Version 5 and later, where it has been replaced by SETUP.
The user starts the installation process, either by booting off the installation media, running the MS-DOS installer from MS-DOS, or running the Windows installer from an existing Windows install. The MS-DOS installer goes straight to the text-based interface below to allow the user to install Windows.
IBM introduced the first version of fdisk (officially dubbed "Fixed Disk Setup Program") in March 1983, with the release of the IBM PC/XT computer (the first PC to store data on a hard disk) and the IBM PC DOS 2.0 operating system. fdisk version 1.0 can create one FAT12 partition, delete it, change the active partition, or display partition data. fdisk writes the master boot record, which ...
On the IBM PC, all the address space up to 640 KiB was available for RAM. This part of the address space is called "conventional memory" since it is accessible to all versions of DOS automatically on startup. Segment 0, the first 64 KiB of conventional memory, is also called low memory area. Normally expansion memory is set to be contiguous in ...
CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems.It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot.
MS-DOS/PC DOS versions 4.0 and earlier assign letters to all of the floppy drives before considering hard drives, so a system with four floppy drives would call the first hard drive E:. Starting with DOS 5.0, the system ensures that drive C: is always a hard disk, even if the system has more than two physical floppy drives.