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 =--+