Z88 Developers' Notes
Contents   Contents of System Calls

OS_Pur, purge keyboard buffer

RST 20H, DEFB $33

IN: 

     -
OUT, if call successful: 
     Fc = 0, keyboard purged
Registers changed after return: 
     A.BCDEHL/IXIY same
     .F....../.... different
Notes:
The system timeout is also reset, ie. running a loop with OS_Pur and OS_Tin in a loop never switches the machine off, even though the user never touches the keyboard.

Bugs:
 

Related calls:

GN_Sip, system input line routine
OS_In, read (wait for) character from standard input
OS_Tin, read character from standard input, with timeout
OS_Xin, examine input