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From: korpela AT islay DOT ssl DOT berkeley DOT edu (Eric J. Korpela)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Easy Asm Conversion?
Date: 3 Jan 1996 21:36:23 GMT
Organization: Cal Berkeley-- Space Sciences Lab
Lines: 36
Message-ID: <4cessn$pen@agate.berkeley.edu>
References: <4cct14$62v AT sisko DOT dnaco DOT net>
NNTP-Posting-Host: islay.ssl.berkeley.edu
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <4cct14$62v AT sisko DOT dnaco DOT net>,
Eric Heft <eheft AT sisko DOT dnaco DOT net> wrote:
>
>Here is the TC code: If some kind soul would translate this
>It should be easy but I've never really learned asm :(
>
>void WaitForRetrace(void)
>{
>    asm MOV   DX,3DAh
>WR1:
>    asm IN    AL,DX
>    asm AND   AL,0008h
>    asm JNZ   WR1
>WR2:
>    asm IN    AL,DX
>    asm AND   AL,0008h
>    asm JZ    WR2
>}
> 

Then don't learn to write asm.  But learning how to read it is very important.
The following should work.

void WaitForRetrace(void)
{
  while (inportb(0x3da)&0x8);
  while (!(inportb(0x3da)&0x8));
}

If for some reason you need the speed of the assembly call you can rewrite
inportb as an inline function.
-- 
Eric Korpela                        |  An object at rest can never be
korpela AT ssl DOT berkeley DOT edu            |  stopped.
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