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Amiga MA Magazine 1997 #3
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amigamamagazinepolishissue03-1
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polski_aminet
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michal_letowski
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debuglib
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src
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kmaygetchar.a
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1996-05-11
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; kmaygetchar.a - KMayGetChar implementation using ROM routines
; $VER: kmaygetchar.a 37.1 (10.5.96)
; Copyright © 1996 Michael Letowski
;
; 37.1 (10.5.96) - initial version
include "exec/funcdef.i"
include "exec/exec_lib.i"
xdef _KMayGetChar
xdef @KMayGetChar
; Some aliases
xdef KMayGetChar
section text,code
******* debug.lib/KMayGetChar ***********************************************
*
* NAME
* KMayGetChar -- get a character from debugging console if present,
* but don't wait. (V37)
*
* SYNOPSIS
* flagchar = KMayGetChar()
* D0
*
* LONG KMayGetChar(VOID);
*
* FUNCTION
* Checks the status of the debugging console (defaults to the serial
* port at 9600 baud). Returns either -1, saying that there is no
* character present, or whatever character was waiting.
*
* RESULT
* char - a character that arrived from console, or -1 if there was
* no char waiting.
*
* NOTES
* @KMayGetChar and KMayGetChar are identical assembly interfaces.
* _KGetChar is the C interface.
*
*****************************************************************************
*
* _KMayGetChar(void)
* @KMayGetChar(void)
*
_KMayGetChar:
@KMayGetChar:
KMayGetChar:
move.l a6,-(sp) ; Save a6
move.l (4).w,a6 ; Load a6 with SysBase
jsr _LVORawMayGetChar(a6) ; Get char, no matter if available
move.l (sp)+,a6 ; Restore a6
rts ; Return d0
end