
no, the other way, there it is :)
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Wed 2 Apr 2003, 23:23,
archived)

for back in the old days when people used to have butlers. It would ring a bell in the basement and a flunky would come and press F5 for you.
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Wed 2 Apr 2003, 23:28,
archived)

...wot is SysRq
while we are at it, what the hell does Alt Gr do?
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Wed 2 Apr 2003, 23:28,
archived)
while we are at it, what the hell does Alt Gr do?

There is a key labeled SysRq on keyboards for PCs that no longer has a standard use. The BIOS keyboard routines simply ignore it; therefore so do the DOS input routines as well as the keyboard routines in libraries supplied with high-level languages.
The key is not totally inactive, however. When it is pressed, nothing is stored in the keyboard buffer, but a BIOS function is called. The default handler of that function does nothing and simply returns. Programs can use SysRq simply by creating an interrupt handler to replace the default stub, but most programs have no need for that functionality. Software that has the potential to completely lock up the system, so that a BIOS interrupt is the only input that could be generated, use SysRq as a form of "panic button."
In Linux systems, provided the kernel has been compiled with the correct option, the key can be used to perform a variety of functions in an emergency, such as syncing disks, killing processes and powering off the computer.
EH???
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Wed 2 Apr 2003, 23:37,
archived)
The key is not totally inactive, however. When it is pressed, nothing is stored in the keyboard buffer, but a BIOS function is called. The default handler of that function does nothing and simply returns. Programs can use SysRq simply by creating an interrupt handler to replace the default stub, but most programs have no need for that functionality. Software that has the potential to completely lock up the system, so that a BIOS interrupt is the only input that could be generated, use SysRq as a form of "panic button."
In Linux systems, provided the kernel has been compiled with the correct option, the key can be used to perform a variety of functions in an emergency, such as syncing disks, killing processes and powering off the computer.
EH???

that nothing was written to understand (like pause/break, print screen, scroll lock, etc), but they were still there, cos it was cheaper and easier to just have pc keyboards with different adaptors on the ends.
( ,
Wed 2 Apr 2003, 23:28,
archived)