Console Driver questions

Dave Rand dlr at daver.UU.NET
Wed Nov 22 11:35:20 AEST 1989

I have been having some problems getting the Pcomm program running under
Interactive Unix. It seems that the at386 console driver doesn't work
quite right. To check this, I connected a VT100 directly to the system,
logged in, and ran pcomm - this worked correctly.

The symptom of this problem is that the boxes surrounding some of
the messages displayed during the use of pcomm are corrupt. Usually
the vertical bars displayed on the rightmost side of the box show
up several characters to the right of their correct position.

Doing a dump of the data being written to the screen shows that the
problem seems to occur when hard tabs (0x9) are used following
a cursor positioning sequence. It looks like the console driver is
not resetting the "spaces left" variable when a cursor positioning command
is used.

Has anyone else noticed this? Is there a workaround? Is there a fix?

Dave Rand
{pyramid|hoptoad|sun|vsi1}!daver!dlr	Internet: dlr at

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