Quote Originally Posted by jdreesen View Post
Just looked at my backpack documentation : bsx l/r are interchanged between the communications backpack and the firmware backpack. That is why the expander shows up in the wrong slots.....Clearly an implementation error from Tektronix.

Thanks - that matches my test results.

You may want to put a note about that address swap of the RS-232 Printer Interface in your MFM document.