tektronix/tek440.xcpp adds 8255 printer interface

[Elektraglide]

No description provided.

[cuavas]

I think it’s going to be confusing if you call the 8255 printer rather than using that as the tag for the Centronics port itself.

You should really add the Centronics port and output latch devices (e.g. see skeleton/zorba.cpp for a simple example).

But looking at the code it seems to only do something with the keyboard interface? Is this connection from the PIA to the keyboard documented in the service manual? If this PIA bit can force KDO high, you’ll also need to update kb_rclamp_w, diag_w and kb_tdata_w to consider it.

Would it be easier to have a single function that calculates the KDO line state from all the signals that can affect it?