640K


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640K

(640 Kilobytes) In the early days of PCs, 640K referred to the first 655,360 bytes of memory, known as "conventional memory." It was all the RAM that could be used for applications, although techniques were used to squirrel away drivers and other small programs into the upper memory areas. See conventional memory, PC memory and PC memory map.

All There Was in 1989
This excerpt from the January 1989 issue of PC Magazine touted the drive bays of an NEC computer costing USD $2595 with 640K of RAM.
References in periodicals archive ?
The DSL service level used include the 640K/ 640K designed for each ANSI/CSA loops.
We knew that even 16-bit computers, which had 640K of available address space, would be adequate for only four or five years.
To run the program, you'll need 640K of RAM on PCs and 2MB on Macs.
The full service requires an IBM-compatible computer with 640K of available RAM and a Hewlett-Packard LaserJet (Series II or Series III) or a 100% compatible printer equipped with Center Piece Accounting & Tax Fonts.
As application programs get larger, they bump up against the 640K memory limitation of DOS.
His Sid Meier's Civilization or Rome on 640K a Day (Prima Publishing, 1992 with Alan Emrich) and Official Civilization: Call to Power Strategy Guide (Brady Books, 1999 with Terry Coleman) were also top sellers that artfully entwined game tips and historical references.
The game requires a 12MHZ 286, hard disk drive, and 640K RAM (1-2MB RAM required for digitized speech).
The 1720 is a 16 MHz unit with a 2400-baud modem, 20 MB hard drive and 640K memory expandable to 5 MB.
The service is available in three flat-rate, unlimited access options at downstream speeds of: 640K (11 times the standard 56K modem), 1.
The 256-color MS/PC-DOS version requires 640K and supports MCGA and VGA displays.
The DOS version is a very compact 75K, most of which can be loaded into upper memory in the system, leaving more room for applications within the standard DOS 640K limitation.
announced today at the Computer Using Educators (CUE) conference, New Deal SchoolSuite 98, a graphical educational suite for PCs with as little as a 286 processor, 640K RAM and 9Mb hard drive space.