Michael Abrash

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Michael Abrash is an American programmer and technical writer. He has written dozens of magazine articles and multiple books on code optimization and software-rendered graphics for IBM PC compatibles. He worked at id Software in the mid-1990s on the rendering technology for Quake. He later wrote the Pixomatic software renderer for RAD Game Tools. Since 2014, he has been the chief scientist of Reality Labs, a subsidiary of Meta Platforms. Abrash started his career in 1982 writing action video games for the IBM PC, which eventually resulted in a 1990 book, Zen of Assembly Language Volume 1: Knowledge, about optimization for the 16-bit 8086 and 8088 processors. He began writing about programming the EGA and VGA hardware of IBM PC compatibles for Programmer's Journal in the late 1980s, followed by a column for Dr. Dobb's Journal in the early 1990s. In the latter, he introduced a method of adjusting VGA mode 13h to have a resolution of 320×240 with square pixels, which he called Mode X. He...

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