• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Part: V Appendixes > ROM BIOS Control Keys

ROM BIOS Control Keys

ROM BIOS commands are available at all times, although an application program can prevent them from working. (All are eliminated or changed when Microsoft Windows is active.) Break and Reboot should be avoided if possible because terminating a program in this way can damage open files, causing lost clusters or data loss. Your computer's ROM BIOS may provide other key combinations as well, such as commands to change processor speed, enter sleep mode, or access the CMOS Setup screen. Some keyboards provide a single key for these services (listed in Table D.1).

Table D.1. BIOS Control Keys and Their Functions
Keystroke Function Description
Ctrl+Alt+Del Reboot Requests the BIOS to perform a system reset (warm boot). Use only at the DOS prompt or when the computer stops responding to normal commands.
Ctrl+Break Break Stops (exits) a command or software application program. Use with caution.
Shift+PrtSc Print screen Prints the contents of the video display (text only). Check that your printer is turned on before requesting this service.
SysReq System request Requests system services. Does nothing on most PC systems. Not available on older 83-key keyboards.



PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint