What Are PrtScn SysRq ScrLk Pause Break Keys for?
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- A couple of minor corections:
Pause is like pressing Ctrl+S, Break was like press Ctrl+C. Note that historically you had to hit Ctrl+Pause/Break. Some Unix and Windows terminal emulators will use these keys. For example, at least one terminal I can think of maps Ctrl+Break to send an actual Break signal (while Ctrl+C just sends Ctrl+C).
PrintScrn would send the text to the PARALLEL (LPT1:) port, not the serial port, though I believe MS-DOS had a utility that you could use to override the default printer (PRN:) to COMx: instead of LPT1:. This may have been a third-party utility (not vendor-supplied).
Also of note, Scroll Lock was a relic back in the 1980s when the IBM Model M with its dedicated cursor keys originally hit the scene (all current full-sized PC keyboard layouts are based on the layout of the Model M). As a result, some WWIV BBS clones (T.A.G., Telegard and Renegade) used Scroll Lock to as a flag to indicate whether or not the SysOp was available for chat.Jul 22, 2013
I corrected a bit, credited you.Jul 22, 2013
- Yeah, SysRq in particular was a relic from the really early days when the PC was supposed to be the next big thing in terminal emulators to talk to your IBM mainframe.Jul 24, 2013