🚀 go-pugleaf

In article <1992Dec30.200952.5153@panther.mot.com>, ronf@panther3.panther.mot.com (Ron Feigen) writes:
> Being my first post, I hope this is the appropriate newgroup.
> 
> I am a Unix/C/Assembler type that finds himself in the position of having to
> write/port an app. on an IBM PC.  One of the functions needed is to establish
> carrier on a modem.  My problem?  How do I setup the com?: port using 'C'.
> Asking the user to use the DOS mode command would be sort of kludgy.
> Can anybody give some leads?  Books?  Examples?
> 
> Anyhelp would be greatly appreciated!!!!!!!!
> 
> 
> Thanks in advance, 
> -- 
> 
> >
> Ron Feigen
> ronf@panther.mot.com


There are numerous ways of initializing a serial port with 'C'. My standard
method is to directly write to the UART addresses. A more commonly used method
is to use a library function such as `_bios_serialcom`. Most `C` compilers for
DOS have this function or one that is similar. If you wish to write directly
to the port addresses, the proper function to use would be 'outp','outport`,
`outportb', etc., again depending on the compiler you are using.
Good Hunting...

John

In article <1992Dec30.200952.5153@panther.mot.com> ronf@panther3.panther.mot.com (Ron Feigen) writes:
>Being my first post, I hope this is the appropriate newgroup.
>
>I am a Unix/C/Assembler type that finds himself in the position of having to
>write/port an app. on an IBM PC.  One of the functions needed is to establish
>carrier on a modem.  My problem?  How do I setup the com?: port using 'C'.
>Asking the user to use the DOS mode command would be sort of kludgy.
>Can anybody give some leads?  Books?  Examples?
>
>Anyhelp would be greatly appreciated!!!!!!!!
>
>
>Thanks in advance,
>
>
>
>
>-- 
>
>>
>Ron Feigen
>ronf@panther.mot.com


I found a great book called:

Serial Communications in C and C++
written by Mark Goodwin
published by MIS:Press


good luck!
-- 
Rudy Witt                          Internet:  rudy@witt.almanac.bc.ca
Merit Technologies Ltd.               Voice:  604-245-4746
Ladysmith, BC.
---------------------------------------------------------------------

ronf@panther3.panther.mot.com (Ron Feigen) writes:

>Being my first post, I hope this is the appropriate newgroup.

>I am a Unix/C/Assembler type that finds himself in the position of having to
>write/port an app. on an IBM PC.  One of the functions needed is to establish
>carrier on a modem.  My problem?  How do I setup the com?: port using 'C'.
>Asking the user to use the DOS mode command would be sort of kludgy.
>Can anybody give some leads?  Books?  Examples?

>Anyhelp would be greatly appreciated!!!!!!!!


>Thanks in advance,



I suggest using an already made library.  I user ENCOM, from ENQUE
software.  I belive the file is ENCOM100.ZIP in the SIMTEL archives.  It
helps recognise special chips...  
I found it easy to use.  If all you need is a small model library, the
SIMTEL file should do... If you need source, the phone number for the
author is included, and I think it is about $50.00 or so.  I called for
tech. support, and they were very helpful.

In article <1992Dec30.200952.5153@panther.mot.com> ronf@panther3.panther.mot.com (Ron Feigen) writes:
>Being my first post, I hope this is the appropriate newgroup.
>
>I am a Unix/C/Assembler type that finds himself in the position of having to
>write/port an app. on an IBM PC.  One of the functions needed is to establish
>carrier on a modem.  My problem?  How do I setup the com?: port using 'C'.
>Asking the user to use the DOS mode command would be sort of kludgy.

Well, if you wanted to do what the ms-dos mode command does, it
does an int 21 to set up the serial port. The int 21 is implemented
throught the serial port device driver [also a part of msdos unless 
you've installed a replacement for the default one in io.sys] which
eventually does a BIOS call. The BIOS then talks to the UART directly.

You can of course talk to the UART or the BIOS yourself, and skip msdos
- particularily if you want to program the chip in a method not provided
by msdos/BIOS. The book _DOS Programmer's Reference_ by Terry Dettmann,
published by QUE, covers the MSDOS, BIOS, and UART. [Don't confuse this
book with the microsoft ms-dos programmer's reference - the latter is
only the official programmer's doc for ms-dos 5.]  All C compilers I've
worked with provided library functions for this - check it out.

Someone else has posted how to get the UART spec; you can purchase the
BIOS doc from IBM.

-jen
 Not speaking for microsoft. Just cause I work with msdos doesn't
 mean I'm totally nuts.