The BIOS setup has also been called the "CMOS setup" or the "CMOS RAM," because user settings were initially held in a tiny, battery-backed CMOS memory bank that is part of the PC's real-time clock circuit. Subsequently, more user configuration settings were stored in the BIOS flash memory.
Accessed at Startup
The BIOS setup is accessed at startup. Soon after a PC is turned on, a short text message typically passes by very quickly on screen indicating which key to press (usually the DEL or F1 key). If no message appears, refer to the system manual. See BIOS, hard disk configuration and BIOS Upgrades.
![]() | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
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