Motorola quick start Using the SM56 Modem, Bit Windows 95/98 Applications, COM Port, IO Address

However, if you change from Windows 95 or Windows 98 to Windows NT you must get a new set of drivers for that operating system. The SM56 modem software for Windows 9x will not work under Windows NT. Contact your direct modem vendor or PC supplier for drivers, or visit their Web sites.

10 Using the SM56 Modem

32-Bit Windows 95/98 Applications

Because 32-bit Windows 95/98 applications use TAPI for communicating with modems, using the SM56 is as easy as selecting the SM56 modem by name from the list of available modems.

16-Bit Windows 95/98 Applications

Because 16-bit applications cannot use the TAPI interface, there is a bit more setup required.

1.Select Motorola SM56 modem from the list of supported modems (if the SM56 modem is not shown, select Hayes Compatible modem...see also REVHIST.TXT for other selections).

2.Configure the application's COM port selection. Use the COM port assigned to the SM56 modem, e.g. COM 2.

3.If the application requires it, enter specific AT commands for the SM56 modem. Normally you will not need to do this. (For a full list of AT commands supported by the SM56 refer to the SM56 on-line User's Guide). Some of the more common AT commands are listed below.

DOS-Based Applications and Games

Importnt: DOS box support is disabled after the SM56 is installed. After install is complete, you must enable it via the Advanced tab in the SM56 Control Panel application (Start->Settings- >Control Panel, then double-click the SM56 Modem icon). Make sure the DOS box check box is checked. If not, click it to check it, exit the SM56 Control Panel application and restart the computer. You must restart the computer to complete DOS box enabling.

The SM56 can be used by DOS applications only through a Windows 95/98 DOS box. Win 9x DOS box support is achieved by virtualizing the standard I/O and IRQ assigned to a COM port. This means that the SM56 drivers capture and redirect all I/O to/from the standard I/O address for the COM port to which it assigned. In simpler terms, you tell the application the COM port that the SM56 modem is installed on, and then use all the standard I/O and IRQ settings. Standard I/O addresses and IRQs for COM Ports 1-4 are as follows:

COM Port	IO Address	IRQ
1	3F8	4
2	2F8	3
3	3E8	4
4	2E8	3

To determine the SM56 COM port number, open the SM56 Control Panel application (Start- >Settings->Control Panel and double click the SM56 Modem icon), and select the Diagnostics tab. The COM port number to which the SM56 modem is assigned is listed here. Configure your