1. COM Ports and Open
Hi everyone,
I asked it before but I got no awnser, so here am I.
Is there any routine or anything else to know with wich parameters a COM
port is open.
Thanks for any feedback
Florian
2. Re: COM Ports and Open
Ýòî ñîîáùåíèå â ôîðìàòå MIME ñîñòîèò èç íåñêîëüêèõ ÷àñòåé.
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Hi Florian,
>Is there any routine or anything else to
> know with wich parameters a COM port is open.
Try program from attachment (-: *AS IS* 
On my machine, there are 4 COM-ports,
1- mouse, 2-modem, so I have tried COM4.
If I open("COM4","rb") --- fn = 3,
but machine *HANGS UP*, when getc(fn).
If I ** open("COM4 96","rb") ** --- fn = 3
and getc(fn) gives
123
49
44
125
-1
-1
-1
If I open("COM4 48","rb") --- fn = - 1
So, I think, open() function opens
COM-port at 96, (9600 baud), but
this speed must *be* in the command.
My machine run Win95 and hangs up
both on plain DOS and Win95.
All my actions are non-documented,
remember please, this area is among
BIOS interruptions and Win95 drivers.
This is the very rare thing.
Regards,
Igor Kachan
kinz at peterlink.ru
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Content-Type: application/octet-stream; name="Md.ex"
Content-Transfer-Encoding: 7bit
Content-Description: Md.ex (EX )
Content-Disposition: attachment; filename="Md.ex"
integer fn,a
fn=open("COM4 96","rb")
?fn
a= system_exec("mode COM4 /status",1)
for i=1 to 8 do
? getc(fn)
end for
close(fn)
-- "CON" - the console (screen)
-- "AUX" - the serial auxiliary port
-- "COM1" - serial port 1
-- "COM2" - serial port 2
-- "PRN" - the printer on the parallel port
-- "NUL" - a non-existent device "black hole"
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3. Re: COM Ports and Open
Hi again Florian,
Sorry my misprint:
getc(fn) gives
123
49
44
50
125
-1
-1
-1
not
123
49
44
125
-1
-1
-1
Sorry please
Igor Kachan
kinz at peterlik.ru
4. Re: COM Ports and Open
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Hello Igor,
on my computer (2 COM-ports), the open("COM1or2","rb") function return -1
each time I try to specify the speed (9600, 4800, 2400, 1200 or 600 bauds)
but works correctly without speed specification.
Is there any rule or to know what must be filled in?
Thanks for your help and sorry for the english.
Florian
> Hi Florian,
>
> Try program from attachment (-: *AS IS*
>
> On my machine, there are 4 COM-ports,
> 1- mouse, 2-modem, so I have tried COM4.
>
> If I open("COM4","rb") --- fn = 3,
> but machine *HANGS UP*, when getc(fn).
>
> If I ** open("COM4 96","rb") ** --- fn = 3
> and getc(fn) gives
>
> 123
> 49
> 44
> 125
> -1
> -1
> -1
>
> If I open("COM4 48","rb") --- fn = - 1
> So, I think, open() function opens
> COM-port at 96, (9600 baud), but
> this speed must *be* in the command.
> My machine run Win95 and hangs up
> both on plain DOS and Win95.
>
> All my actions are non-documented,
> remember please, this area is among
> BIOS interruptions and Win95 drivers.
>
> This is the very rare thing.
>
> Regards,
> Igor Kachan
> kinz at peterlink.ru
>
>
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Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<p>
Hello Igor,</p>
<p>
on my computer (2 COM-ports), the open("COM1or2","rb")
function return -1 each time I try to specify the speed (9600, 4800, 2400,
1200 or 600 bauds) but works correctly without speed specification.</p>
<p>
Is there any rule or to know what must be filled in?</p>
<br>Thanks for your help and sorry for the english.
<p>Florian
<blockquote TYPE=CITE><i>Hi Florian,</i><i></i>
<p><i>Try program from attachment (-: *AS IS* </i><i></i>
<p><i>On my machine, there are 4 COM-ports,</i>
<br><i>1- mouse, 2-modem, so I have tried COM4.</i><i></i>
<p><i>If I open("COM4","rb") --- fn = 3,</i>
<br><i>but machine *HANGS UP*, when getc(fn).</i><i></i>
<p><i>If I ** open("COM4 96","rb") ** --- fn = 3</i>
<br><i>and getc(fn) gives</i><i></i>
<p><i>123</i>
<br><i>49</i>
<br><i>44</i>
<br><i>125</i>
<br><i>-1</i>
<br><i>-1</i>
<br><i>-1</i><i></i>
<p><i>If I open("COM4 48","rb") --- fn = - 1</i>
<br><i>So, I think, open() function opens</i>
<br><i>COM-port at 96, (9600 baud), but</i>
<br><i>this speed must *be* in the command.</i>
<br><i>My machine run Win95 and hangs up</i>
<br><i>both on plain DOS and Win95.</i><i></i>
<p><i>All my actions are non-documented,</i>
<br><i>remember please, this area is among</i>
<br><i>BIOS interruptions and Win95 drivers.</i><i></i>
<p><i>This is the very rare thing.</i><i></i>
<p><i>Regards,</i>
<br><i>Igor Kachan</i>
<br><i>kinz at peterlink.ru</i>
<br><i></i>
<br> </blockquote>
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