I finally got around to completely reverse-engineering a spare Micro-SCI floppy disk controller, and have managed to duplicate it.  It has been running in my ACE1000 all morning, and appears to be working correctly.

usci.png

Some time ago I found an old Brose ASCII keyboard from Germany (post some more about this later), which I want to use with my Apple-1 build. I thought it was smart to test it in isolation before hooking it up to an Apple-1 or ][. As a software guy I am quite new to electronics. So I came up with a design of an ASCII Keyboard Tester / breakout board. Maybe it has been done before, but I thought it was a good excercise for me anyway.