uart 16550AN

Richard M. Heiberger (rmh@fisher.stat.temple.edu)
Fri, 9 Jan 1998 03:24:27 -0500

This chip is in the "Telepath for Windows with x2" modem that is included in
my new Gateway 300 MHz machine. I originally installed 2.0.25 from the
Linux Universe CD-ROM. linux refuses to acknowledge the device. it claims
an "unknown" chip. I downloaded 2.1.78 and am looking at the source code.
The string "16550AN" is not there. I assume therefore that this version will
also not be able to talk to my hardware.

I have a second, probably related problem. Com1 has a 16550A chip.
I can use it to configure a direct connection ppp link to another machine.
linux refuses to recognize an external modem when I place it on that line.

both ports, the internal modem on com2 and the external modem on com1 work
correctly in windows 95 mode.

details from the windows 95 control panel/system/mode/telepath window
general: gateway, hardware version 1.0
modem: telepath for windows with x2
driver: provider not available, date 9-11-1997, version not available
port settings: use fifo buffers (requires 16550 compatible uart)
defaults are recive=14, transmit=16

details from the windows 95 control panel/system/ports/telepath
resource: interrupt request 03
input/output range 0110-0117

details from the windows 95 control panel/system/modem/telepath window
right-click on telepath gives modem Properties
diagnostics/com2
right click on com2 to More Info
port com2, interrupt 3, address 110, uart NS 16550AN, highest speed 115K baud
In the bottom half of the window ti has
identifier: UNIMODEM5A28D161
and what looks like a list of Hayes modem commands. I think the interesting one
is
AT17 VXD date 11/26/97
AT17 VXD rev 1.41.017

Is it possible to set the driver so 16550A* is identified as a generic 16550A?

thanks