🚀 go-pugleaf

I am attempting to install the NCSA Telnet network software package on
a CompuAdd 286/12 AT clone.  The PC has a 3Com 3C505 Ethernet board
installed, with IRQ interrupt number 12, DMA channel 5, and I/O
address 0x300.  I'm using the 3C505.COM "packet driver" TSR driver
program supplied with the NCSA package to interface with the board.

The driver installs perfectly fine, and I can run Telnet and connect
to a host just fine at first.  Then, after I've been logged in for
just a few minutes, the Telnet program seems to "freeze up" and
not display any output from the host (which is a Sun 3/260 running
Sun/OS 4.0.3).  I can still hit Alt-X to exit from Telnet.
Similarly, the NCSA FTP program seems to work OK at first, but
during long file transfers (over 1 Mb.) eventually "freezes up" and ceases 
to receive packets from the host.  The FTP program locks up in such
a way that I have to reboot the PC.

I know that the Ethernet connection to the Sun is fine, since I've
been able to install and run Sun's PC-NFS software on the same PC
with no problems at all.  The problem seems to be something
between the packet driver and the Ethernet board.  I tried adjusting
the "mtu", "rwin", and associated IP packet parameters in "config.tel",
but these didn't seem to make a difference.  If someone has any advice
about how to solve this problem, I'd greatly appreciate it if they
would reply to me by e-mail or post to the Net.

Thanks,

David R. Kohr   M.I.T. Lincoln Laboratory    Group 45 ("Radars 'R' Us")
	email:	KOHR@LL.LL.MIT.EDU   or   DRK@ATHENA.MIT.EDU
	phone:	(617)981-0775 (work),   (617)527-3908 (home)