Message-ID: <330259F2.362C@post.comstar.ru>
Date: Wed, 12 Feb 1997 16:01:54 -0800
From: Dim Zegebart <zager AT post DOT comstar DOT ru>
Reply-To: zager AT post DOT comstar DOT ru
Organization: zager AT post DOT comstar DOT ru
MIME-Version: 1.0
To: DJGPP Mail List <djgpp AT delorie DOT com>
Subject: Re: TCP/IP Library, Svasync Library, and a Stdout that won't flush
References: <Pine DOT SUN DOT 3 DOT 91 DOT 970212134116 DOT 7031D-100000 AT is>
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Eli Zaretskii wrote:
> 
> On Sun, 9 Feb 1997, Logan Bowers wrote:
> 
> > The only CommPort library I could find (Svasync) doesn't let you set the
> > IRQ for the comm port that you use.  I need to use COM3, but it is on a
> > non-standard IRQ of 9.  The library will only work if I set the IRQ of
> > the port to 4.
> 
> Why won't it work for IRQ 9?  Is the number of IRQ hard-wired into the
> Svasync code?
> 
> One thing that is different between IRQ 4 and IRQ 9 is that for 9 you
> need to send EOI to both master and slave interrupt controllers, whereas
> for 4 you only need to EOI the master.
> 
> > In the source code, it has 4 settings for each port:
> > Port, VectorNum, EnableIRQ, and DisableIRQ.  So how do I set these to
> > access my port on COM3?

Firts, use it

        dosmemget(0x400+CommPort*2,2,&Port); //getting comport address
        switch (CommPort)
         {
           case COM1:
           case COM3:
              VectorNum = 0x0C;
              EnableIRQ = 0xEF;
              DisableIRQ = 0x10;
              break;
           case COM2:
           case COM4:
              VectorNum = 0x0B;  //change this value
              EnableIRQ = 0xF7;
              DisableIRQ = 0x08;
              break;
         }
[snip]
        _go32_dpmi_get_protected_mode_interrupt_vector(VectorNum,
&ProtVector);


-- 
Regards,
Dim Zegebart,
Moscow Russia.