This reminds me of hacking ANSI.SYS escape sequences back in the day. You could create a text file which would be "executed" when someone entered "type readme.t

This reminds me of hacking ANSI.SYS escape sequences back in the day. You could create a text file which would be "executed" when someone entered "type readme.txt" at the DOS prompt, by using keyboard remappings and so on. I remember creating a fairly unsuccessful "text file virus" that would try to copy itself around our school network and reboot people's machines. Good times...