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Int 15 Fn 85 C - OS Hook - Sysrq Key Activity (at,ps) [B]
AH = 85h
AL = 00h SysRq key pressed
= 01h SysRq key released
CF clear
Return: CF clear if successful
AH = 00h
CF set on error
AH = status (see AH=84h)
Notes: called by keyboard decode routine
the default handler simply returns successfully; programs which wish
to monitor the SysRq key must hook this call
See Also: INT 09
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