The original V7 terminal driver was designed to be used with printing devices and doesn't play too well with the 'glass terminals' that we all use today. Personally I find that I don't get on with the use of '#' to delete a character, and 'delete' to send the interrupt signal. This was as true in the 1980's as it is now.
The tty driver included here came from a distribution from Nijmegen University in Holland. It's similar to the driver I've adopted for UNIX V6. It came from a tape image Torsten_Hippe_v7 I found on the www.tuhs.org archive. There are a couple of versions of this code available on the Archive, one is from Nijmegen, but I think it's later than the version I am using here. This version is somewhat simpler and does the job.
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Install and build the new kernel code replacing the old tty.c, its header and drivers. This uses files in the sys directory. For more on that see sys/README.
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Run make to compile the commands in this directory. When installing the system, define LOCAL in the makefile to make compilations uses header files from the sys directory. This allows you to create the binaries that will work with the newly compiled kernel, but without having to replace the files in /bin and /etc.
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Once you've installed the kernel code, you'll be surprised that the new erase/kill characters you have installed in the kernel are not set up when you login. This will continue until you replace /etc/getty and /bin/login. The sett program can be compiled and installed to set the values to what are now the defaults. It's a temporary measure but makes your life easier. On the plus side, your Interrupt character (by default ^C) will work now.
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Install getty in /etc/getty, reboot and check that it works. You do need to reboot, because getty will be open and running in a live system. I've made quite a few changes to getty to make it work better with the system API. The program is forked by init and sits on terminal lines waiting for people to login. It uses /etc/ttys to choose a setting for a specific terminal connection. Set the first character to 1 to enable a terminal The second character in each line of the file selects a terminal setup value from a table compiled into getty. Use '4' for the console, and '3' if you have additional terminals using the DC interface. However, when you install getty, you'll still find that sett or stty will still be needed, you need to replace login before the full control character settings will appear on login.
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Install login in /bin/login, reboot and check that it works. Now the default character controls will all be available to you on login.
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Install stty in /bin/stty.c. I've written this version of stty, because I couldn't find a version that fully supported the terminal driver. I've also created a version of the man page for stty.
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Once things are working, and the appropriate files are installed in /usr/sys/h and /usr/include, you can recompile the binaries and re-install removing the LOCAL declaration from the makefile.
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sys - Files for installing the new terminal interface and associated drivers into your kernel.
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orig - the original files from the V7 distribution.