NewDeal Technical Support Document 213
Procedures for installing and trouble shooting a modem
Setting up your modem
Setting up a modem can be a complicated procedure, depending on
your computer's configuration, but these instructions will work
for most systems.
- If you have an INTERNAL modem, find out what COM port
your modem is set for. Consult your modem manual for help. The
COM port is usually set by changing small switches or jumpers
on the modem card. Your modem cannot use a COM port that is
already in use. For example, if your computer already has a
COM 2, you must disable that COM 2 before you can install an
internal modem configured for COM 2. Plug & Play modems are
configured using a software program that comes with the modem.
If you have an EXTERNAL modem, determine which COM port your
modem is plugged into. Sometimes the ports are labeled on the back
of the computer.
- Start Preferences and select Modem. Choose the COM port setting
for your modem.
- Click on the Speed and Format Options button.
Set the baud rate for your modem.
Set the parity (usually None), word length (usually 8), and stop
bits (usually 1). These settings must match the settings of
the receiving modem. If you're calling a major online service,
Internet service provider, or bulletin board system, these settings
should be listed with the modem phone number to call, usually in the
format N,8,1 (N for No parity, 8 for word length, and 1 for stop
Leave the handshake setting on None. If you later discover that
your connection is not reliable, return and change the setting
to Software or, especially if you have a high speed serial port
and an external modem, to Hardware.
- Close Preferences and start NewComm. To test your modem, enter
AT and press Enter. Your modem should respond by answering OK.
If it doesn't answer with OK, go to the trouble shooting section.
- To dial a number, select Quick Dial from the Dial menu and
enter a number. Click the Dial button. Your modem should function
If your modem doesn't work, follow these suggestions to try to
remedy the problem.
Note: If your modem works with NewDeal, but you have to
run Preferences, Computer and set the IRQ each time you launch
NewDeal, you can edit your GEOS.INI file to tell NewDeal where
to look for your modem. Use the EDIT command at the DOS prompt
or use the Windows Notepad to examine the GEOS.INI file in the
directory where you installed NewDeal. Look for the section
named [serial] and add a line like this:
- Run Preferences and click the Computer button. Make sure the
COM port for your modem is turned on.
- In the Computer section of Preferences, the interrupt settings
are displayed for the COM ports. No two devices on your computer
can use the same interrupt. For example, if your COM1 has a 4
underneath it and your COM3 also has a 4, the interrupt signals
will conflict with each other. If your mouse is using COM1 IRQ4 and
your modem is using COM3 IRQ4, for example, you will need to change
your mouse or your modem to a different interrupt or a different port.
- If you can't move your mouse to a different port, you'll
need to change the interrupt setting on your modem.
For an internal modem, the interrupt is set either by
switches on the modem itself or, if you have a Plug & Play modem,
by the software driver for the modem. Look in your modem instructions for
the correct way to change it. Sometimes the instructions refer to
interrupt settings as "IRQ" settings.
For an external modem, the best solution is to use a COM
port with an interrupt that won't conflict with another device.
- Once the interrupt setting has been changed on the modem,
go back into Preferences and click on Computer. The new interrupt
setting should be displayed below the modem's COM port. If the
wrong interrupt setting is displayed, change it to the correct
number. If a question mark is displayed, raise or lower the number
and then return it to the correct number. Click on OK.
- Click on Computer again. The interrupt setting you selected
should be displayed. If a different interrupt setting is displayed,
or you received an error message, your modem is not set for the
interrupt you selected, or NewDeal is not recognizing the port and
IRQ setting. If you are sure the IRQ setting is correct, try turning
the modem off and on or restart your computer and then set
the interrupt in Preferences, Computer again. If NewDeal still
does not recognize the port and interrupt, read the rest of
this document, and also see document 262
(Forcing NewDeal to see COM or LPT ports).
portn = i
where n is the port number and i is the interrupt request.
For example, if your modem is on COM 3, IRQ 10, your GEOS.INI
See the note below about Plug and Play modems.
port3 = 10
Windows 95 or Windows 98
If you are using Windows 95 or 98 and your modem is working,
but you are unsure which Com port your modem is using,
open the Windows Control Panel and double click Modems.
In the dialog box, choose the modem and click Properties.
The COM port will be displayed next to the word "Port:".
To determine the interrupt (IRQ) for the port, go back
to the Control Panel and double click System. Click the
Device Manager tab and double click Ports in the list.
Choose the port and click the Properties button. Choose
the Resources tab. The Interrupt Request setting is displayed.
Note: In recent years, some modem manufacturers have
introduced modems that require proprietary Windows software and
will not work with DOS-based programs like NewDeal. Some of these
so called "Win-modems" will not work with NewDeal software.
Generally speaking, if the modem will work with DOS-based
software, it will work with NewDeal.
Plug and Play modems
The port and interrupt for Plug and Play modems are determined
by one of the following:
Consult the documentation for your modem or ask the manufacturer
of your modem to determine how and where to change the port and
IRQ settings, if necessary.
Note: In some cases, the port and interrupt settings for
Plug and Play modems may change when you reboot the computer
or when you add peripherals or change your computer's hardware
- your computer's CMOS
- a DOS driver, probably loaded in your AUTOEXEC.BAT file
- a driver in Windows 95 or Windows 98
Many modern notebook computers, and some desktop computers, use
PCMCIA modems. A PCMCIA modem is a small card that you insert
into the PCMCIA slot, sometimes called a "PC slot" or "thin
PCMCIA modems require special drivers, similar to Plug and Play
modems. If NewDeal is unable to find or use your PCMCIA modem,
you might need to load the DOS drivers for your PCMCIA slot.
Check with the manufacturer of your computer or the PCMCIA slot
to see if DOS drivers are available.
Controllerless or Windows-only modems
In recent years, some modem manufacturers have introduced
inexpensive modems that work only with Windows applications and
do not work from DOS. The intelligence in these modems has been
removed, lowering their production costs, and they require special
Windows drivers provided by the manufacturers to compensate for
the interpreter that has been removed from the modem. These modems
will not work with DOS programs like NewDeal.
Generally speaking, NewDeal does not support most ISDN modems.
However, some customers have been able to use their ISDN
modem, if the modem is fully Hayes compatible.
As of this writing, NewDeal does not support any known cable modems
directly. One possible work around is to set up a network
server connected to the cable modem, and then use the
ODI Ethernet driver to connect to the Internet from
workstations on the network that are running NewDeal software.
Common IRQ assignments in an IBM compatible system
- IRQ0 -- Timer (Called 18.2 times/per second)
- IRQ1 -- Keyboard
- IRQ2 -- Second 8259 (cascading interrupts )
- IRQ3 -- Serial interface 2 (COM2)
- IRQ4 -- Serial interface 1 (COM1)
- IRQ5 -- Hard Disk (XT computer) or second printer (AT computer)
- IRQ6 -- Diskette (floppies)
- IRQ7 -- Printer (LPT1 & PrtScr)
Last Modified 15 Feb 1999