IBM PS/1 and Aptiva systems. This document describes the procedure for getting Rapid Resume to work with Stacker 4.0. The procedure can be applied to Stacker 4.0 with just about any version of DOS (PC DOS 6.1, 6.3, and 7.0, and MS-DOS 6.0, 6.20, 6.21, and 6.22). The procedure was verified on an MS-DOS 6.2 system with Rapid Resume. Stacker 4.0 from IBM PC-DOS 7.0 Complete, unrestricted, no serial or registration input required. Full-featured in every respect to the retail Stacker 4.0 product. It may have shipped with PC-DOS, but is quite happy to run on whatever flavor DOS you are using. These utilities are included in PC DOS Version 7: IBM AntiVirus. Stacker 4.0 Compression to maximize the amount of data that can be stored on the system hard disk. IBM PC DOS (an acronym for IBM personal computer disk operating system) is a discontinued operating system for the IBM Personal Computer, manufactured and sold by IBM from the early 1980s into the 2000s. PC-DOS 7.0 was released in April '95. Subsequently, IBM released slipstream updates to fix the Y2K issue. Then in 1998 IBM released PC-DOS 2000, a relatively minor update to 7.0, which incorporated those fixes. 7.0 reports itself to applications as 'IBM PC DOS 7.00, revision 0, while 2k reports itself as 'revision 1'. Microsoft had long planned that MS-DOS '4' would be a multitasking-capable operating system, but IBM had insisted on creating a new version of regular DOS for use with their PS/2 computers. The below versions, as released to the consumer market, are based on DOS 3.3x and IBM's PC-DOS 4.0 enhancements.
Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.
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For IBM-specific releases, please see the IBM PC-DOS product page.
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MS-DOS 4 added support for hard drive partitions up to 2GB. It used much more of the base 640K, and was somewhat buggy.
Microsoft had long planned that MS-DOS '4' would be a multitasking-capable operating system, but IBM had insisted on creating a new version of regular DOS for use with their PS/2 computers. The below versions, as released to the consumer market, are based on DOS 3.3x and IBM's PC-DOS 4.0 enhancements. Although essentially scrapped, some narrow European markets did receive Microsoft's Multitasking MS-DOS 4.0
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Microsoft's initial 4.00 release (File dates 10/6/1988) was quickly followed up by 4.01, making this an uncommon version. To add to the confusion, most OEMS badged their 4.01 disks as '4' or '4.0'.