matt@prism.UUCP (05/05/85)
<...in a show with everything but Yul Brenner.>
I am having a problem using IBM's EGA and a 3Com Ethernet board together. The
boards are installed in an XT with monochrome monitor, using the MIT PC/IP
networking software to talk to our VAX and Pyramid.
The networking software works fine from the time I boot the machine to the time
I use the monochrome monitor in graphics mode (running DRI's GEM). After
exiting GEM and returning to alpha mode, I find that the MIT ethernet software
is no longer able to reach the net. Every ftp or telnet attempt fails with the
message "Unable to send packet."
My suspicion is that the EGA and the 3Com card are using overlapping areas of
the XT's I/O address space. I know that the 3Com card uses 16 consecutive
addresses beginning at hex 300 (this is configurable by changing jumpers on the
board), but I have no idea what the EGA is using.
Could someone out there with access to the EGA reference manual mail me the
information about which I/O addresses are used in the various alpha and
graphics modes? Thanks in advance.
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Matt Landau {cca, datacube, inmet, mit-eddie, wjh12}...
Mirror Systems, Inc. ...mirror!prism!matt
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