DOOM II Serial Device Driver Version 1.4
Revision 1.4.04 by Tan Chan Siong

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!NOTES FROM TAN CHAN SIONG!
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Featuring 2 new parameters to modem play DOOM 2. With these
features, you can start a deathmatch right after your gameplay
negotiations with your opponent by switching your modem from
voice to data connection mode without calling your opponent again.

New parameters for SERSETUP.EXE:

-ATD will tell your modem to pick the phone line and dial switching mode.
-ATA will tell your modem to pick the phone line and answer switching mode.

When you have finished your voice conversation with your opponent and
ready to deathmatch, follow these instruction carefully:

1. Caller run SERSETUP.EXE with parameter -ATD then wait until
   the modem has picked up the line before hang up the handset.

2. Receiver run SERSETUP.EXE with parameter -ATA then wait until
   the modem has picked up the line before hang up the handset.

3. You will hear the modems handshake and good luck!

If that does not work, try swapping parameter. Check your modem init
string in MODEM.CFG or try to switch to data mode using a terminal
program.

Both of you should hang up your handsets during the handshaking process
otherwise data errors may occur or the line will be disconnected but
make sure your modem has picked the line before you hang up your hangset!

The commands "AT S7=255 S10=255" will tell your modem not to hang up
while data errors occur in case SERSETUP fails to start. Also, you
can switch back to voice mode by picking up the hangset before you
hang up the modem after playing or errors occur.

Connecting with earlier version of SERSETUP might not work! The source
code for the original serial driver can be found at: ftp.idsoftware.com
Contact me for any bugs or problems via e-mail: chantan@pop.jaring.my
If you live in KL and want to frag me, please tel: 03-2211732

                                              - Happy fraging! :)