Communications 14.4 V.32bis Modem Setup


To get 57,600 with Windows 3.1, you may need a replacement comm driver like cybercom.drv, which only works with a 16550A UART. You can run msd.exe to try and determine which UART you have. I have internal 14.4 modem that supports V.32bis, but does not have a 16550 UART, and I am able to run at 57,600 with Windows for Workgroups (WFW) without any comm port overruns. If you have problems at 57,600, try 38,400 and check the communications FAQs.

I also use the updated WFW serial.386 driver from Microsoft WG1001.exe.

Note: there is only a small difference in throughput or cps (characters per second) between 57,600 and 38,400 baud settings on 14.4 modems.

Your mileage may vary!

I use comx as an example in this reference. Where x is the com port your modem is connected to, i.e., 1, 2, 3, 4. Example com2fifo=1

Windows for Workgroups and Cybercomm Driver Settings for Windows 3.1

In system.ini          [*Windows for Workgroups (WFW) or cybercomm*]
comm.drv=comm.drv      [*WFW*]
comm.drv=cybercom.drv  [*Cybercom and Windows 3.1*]

comxfifo=1             [*Required Setting for 16550A UART*]
comxbuffer=1024        [*Optional: 128 to 4096. Default is 128*]

Correction: You do not need to make changes to the control panel
or win.ini to change your baud rate for Trumpet.

Here are other setting you might try for WFW and a 16550A UART only. Information on these seetings is available from the Microsoft Knowledge Base Document: Windows Support of the 16550 UART

I do not use these settings.

comxrxtrigger=8        [*Optional WFW settings are 1, 4, 8, 14. Default 8*]
comxtxfifo=0           [*Optional WFW settings are 0 or 1. Default 0*]

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