The BIOS was introduced with the AT. Earlier PCs were configured with jumpers on the mainboard. Usually you are prompted to "Run Setup" during boot. Sometimes you aren't. Figuring out which key combination gains you access to the BIOS can be difficult. Here's a list that I found:
Acer: (Ctrl)(Alt)(Esc)
ALR PC: (F2) or (Ctrl)(Alt)(Esc)
AMI BIOS: (Del), (F1), (F2)
AST, Advantage: (Ctrl)(Alt)(Esc)
Award BIOS: (Del) or (Ctrl)(Alt)(Esc)
Compaq: (F10). Do this when the cursor is in the upper right corner of the screen blinking.
Dell: (F1), (Del), (Ctrl)(Alt)(Enter). Some require pressing reset twice.
DTK BIOS: (Esc)
Gateway 2000: (F1)
Hewlett Packard: (F1)
IBM:
- Older Models: In order to get into the configuration of the IBM setup screen (CMOS) screen you need to hold down both mouse buttons during bootup.
- Aptiva: (F1)
- IBM PS/2: (Ctrl)(Alt)(Ins) after (Ctrl)(Alt)(Del)
- IBM PS/2 with reference partition: Press (Ins) during boot
- Some PS/2s, such as 75 and 90: (Ctrl)(Alt)(?)
- Some PS/2s when pointer at top right of screen: (Ctrl)(Ins)
NEC: (F2)
Packard Bell: (F1) or (F2)
Phoenix BIOS: (F1), (F2), (Ctrl)(Alt)(Esc), (Ctrl)(Alt)(S), (Ctrl)(S), (Ctrl)(Alt)(Ins)
Sharp Laptop 9020: (F2)
Sony: (F3) while you are starting the PC, then (F2) or (F1)
Tandon: (Ctrl)(Shift)(Esc
Toshiba: Press (Esc) or (F1) during boot
Olivetti PC Pro: (Shift)(Ctrl)(Alt)(Num Pad Del)
Zenith: (Ctrl)(Alt)(Ins)
If everything else fails, change the configuration so that the checksum fails (simply unplugging a floppy drive works). You will then be prompted to "Run Setup" for sure.
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Last modified 2005-03-05