Programming Windows: Microsoft OS/2 (Premium)


While the IBM PC and its follow-up, the hard drive-based PC XT, were huge successes, the firm stumbled with subsequent models. The IBM PCjr, an ill-fated attempt to capitalize on the home market, was an outright disaster. And the IBM AT, IBM’s first non-8088-based PC, shipped in 1984 with an Intel 80286, a chip that Bill Gates had called “brain-dead.” He had advised IBM to wait for the more powerful and 32-bit 80386, which wouldn’t even be announced until a year later.

Worse, MS-DOS---or, PC-DOS, as IBM called it---had been quickly released to accommodate IBM’s rush schedule for the first PC in 1981 and the limitations imposed by its 16/8-bit Intel 8088 processor and its weird segmented memory model in which only the first 640 KB of system RAM was easily accessible. And just a few years later, DOS was having a hard time keeping up with the changes coming in subsequent 16- and 32-bit Intel chipsets.

Gain unlimited access to Premium articles.

With technology shaping our everyday lives, how could we not dig deeper?

Thurrott Premium delivers an honest and thorough perspective about the technologies we use and rely on everyday. Discover deeper content as a Premium member.

Become a Premium Member Create a Free Account