25 Aug
2021
25 Aug
'21
10:16 a.m.
On Aug 25, 2021, at 12:04 PM, Douglas Taylor via
cctalk <cctalk at classiccmp.org> wrote:
In the video on youtube and in my
experience the screen formating codes seem to be incorrect. You can see this in the video
when a man page is brought up. The bolding does not occur. I get the same result after
installing. The same with vi, it doesn't work in the video and doesn't work after
installation. I've tried Teraterm, putty, xterm all with the same result.
Haven't tried an actual terminal yet. What was your experience?
I have near zero PDP-11 Unix experience, but I remember one flavor (BSD 2.11 ?) which set
the top bit in its alleged ASCII output, which of course would break any terminal
expecting actual 8 bit coding. In particular, code points in the range 128-159 have a
very different meaning from those in the range 0-31, and a terminal correctly implementing
ANSI controls (such as a VT220) would show this clearly.
You can tell SIMH to force the top bit to zero in terminal output; that will restore
normal behavior with current terminals or terminal emulators.
No idea if that's the reason for the problem you were seeing, but it's a
possibility that's easy to test.
paul