Arduino Nano - simulate 1MHz pulse

I was bitten by the 65C0x bug while living and working in Munich in the 1980s. The technical magazine MC had a special issue that described the "EMUF", a complete 65C04 computer with just a few chips. I had a lot of fun with that board, and still have both that issue of MC and EMUF, somewhere.

http://retro.hansotten.nl/6502-sbc/emuf-and-mc/