From: buers AT gmx DOT de (Dieter Buerssner)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: I need to advice on timing...
Date: 31 Jan 2000 20:05:40 GMT
Lines: 23
Message-ID: <874puj$3d1nd$1@fu-berlin.de>
References: <F77915E7F086D31197F4009027CC81C921A6A0 AT probe-2 DOT as-london DOT acclaim DOT com>
NNTP-Posting-Host: dialup-212.162.12.108.frankfurt1.mik.net (212.162.12.108)
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: fu-berlin.de 949349140 3573485 212.162.12.108 (16 [17104])
X-Posting-Agent: Hamster/1.3.8.0
User-Agent: Xnews/2.11.08
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

djgpp AT delorie DOT com (Shawn Hargreaves) wrote in 
<F77915E7F086D31197F4009027CC81C921A6A0 AT probe-2 DOT as-london DOT acclaim DOT com>:

>[linux delay loop for almost exact fast timing]
>[...] hence the forced jump instructions at the start 

Could you please explain, why you need these jump instructions.
I donīt get it.

>     void __delay(unsigned long loops)
>     {
>             int d0;
>             __asm__ __volatile__(
>                     "\tjmp 1f\n"
>                     ".align 16\n"
>                     "1:\tjmp 2f\n"
>                     ".align 16\n"
>                     "2:\tdecl %0\n\tjns 2b"
>                     :"=&a" (d0)
>                     :"0" (loops));
>     }

Dieter