Xref:	news2.mv.net comp.os.msdos.djgpp:8227
From:	"Mike Marcelais" <michmarc AT microsoft DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: int86()
Date:	3 Sep 1996 17:02:04 GMT
Organization:	Microsoft Corporation
Lines:	23
Message-ID:	<01bb99ba$59cb8ee0$ba27379d@michmarc2>
References:	<50g2vc$2ct AT parlor DOT hiwaay DOT net>
NNTP-Posting-Host:	157.55.39.186
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

| 		I'm trying to test a single bit as per a bios interrupt.
| 	Using the int86() function , how can I test to see if an particular 
| 	bit is set = 1 or not = 0 .
| 
| 	ex. outregs.h.al 
| 
| 	I need to test bit 7 of this register for 1 or 0.

Well, just mask it off using the `and' operator:  bit = outregs.h.al & 0x80;

[If you actually need the value to be 1 or 0, rather than non-0, or 0, you can
shift the bit to the right spot:  bit = outregs.h.al >> 7; ]


-- 
+------------------------+----------------------+
| Mike Marcelais         | Excel Developer and  |
| michmarc AT microsoft DOT com | Magic Rules Guru     |
+------------------------+----------------------+
| Opinions expressed in this post are mine, and |
| do not necessarily reflect those of Microsoft |
+--= Moonstone Dragon =---------------= UDIC =--+

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