Keyboard tester program (ROM/TAP)

[nuclear]

In the process of debugging a PS/2 keyboard controller prototype for the spectrum (well, pentagon), I made a simple keyboard tester utility. It builds as a ROM (which was useful in my case as the jumper-selectable second ROM of the pentagon, since I didn't have a keyboard to load it regularly), or as a tape file. Released it as public domain, in case it's useful to other people too. It really helped me figure out what was going wrong with my design :)

http://nuclear.mutantstargoat.com/sw/zxkeybtest/