Re: CTRL-C with assembler

Article View: comp.sys.amiga.tech

Article #8303

Back to comp.sys.amiga.tech Previous Next

#8303

From: Bryce Nesbitt
Date: Wed, 16 Mar 1988 20:37

30 lines
1515 bytes

In article <> bjc@pollux.UUCP (Betty J. Clay) writes:
>
>Checking for CTRL-C is easy in BASIC, and C does it for us, but I cannot 
>find a way to check for it using assembler.  Can someone help, please?

#include "libraries/dos.i"
	....
	moveq	#0,d0			;Set specified signal to zero
	move.l	#SIGBREAKF_CTRL_C,d1	;Choose just the CTRL_C signal
	move.l	4,a6			;Get ExecBase
	jsr	_LVOSetSignal(a6)
	btst.l	#SIGBREAKB_CTRL_C,d0	;See if signal was set
	bne.s	Control_C_hit
	....

;SIGBREAKF is the 32 bit number with just the proper bit set.
;SIGBREAKB is the actual bit number (0 to 31).


Don't bother trying to get an interrupt out of this.  Too much work,
too may obscure traps.

[Because the question was asked in comp.sys.amiga, I'm coss-posting there]
[I hope we get less and less of this type of question in .amiga, and move]
[it all over to .tech]

|\_/|  . ACK!, NAK!, EOT!, SOH!
{O_o} .     Bryce Nesbitt
 (")        BIX: mleeds (temporarily)
  U	    USENET: bryce@eris.berkeley.EDU -or- ucbvax!eris!bryce

Technical Details

Message-ID: <7742@agate.BERKELEY.EDU>

Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!pasteur!agate!eris.berkeley.edu!bryce

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!pasteur!agate!eris.berkeley.edu!bryce
From: bryce@eris.berkeley.edu (Bryce Nesbitt)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga
Subject: Re: CTRL-C with assembler
Message-ID: <7742@agate.BERKELEY.EDU>
Date: 16 Mar 88 20:37:39 GMT
Sender: usenet@agate.BERKELEY.EDU
Reply-To: bryce@eris.berkeley.edu (Bryce Nesbitt)
Followup-To: comp.sys.amiga.tech
Organization: University of California, Berkeley
Lines: 30