25 Aug
2021
25 Aug
'21
9:26 p.m.
On 8/25/2021 5:45 PM, Fritz Mueller via cctalk wrote:
My earlier reply didn't make it to the list.? Here it is:
In simh I am using an 11/53 cpu which has 2 serial ports and you do this :
?? sim> set tti 7b
which clears the higher order bit.? In my configuration tti is the
console.? With this set vi and man pages work as expected, more also.
Doug
On Aug 25,
2021, at 10:16 AM, Paul Koning via cctalk <cctalk at classiccmp.org> wrote:
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.
I discovered working with Unix V6 on my '11/45
that its tty output driver is hard coded to always cook bit 8 as a parity bit, for any
character where bit 8 is not already set (see Lions, line 8522).
--FritzM.