I love this. When I was young I saw a hack for an Amstrad which added light pen support. If I recall it effectively synced with the scans on the crt which tells

I love this. When I was young I saw a hack for an Amstrad which added light pen support. If I recall it effectively synced with the scans on the crt which tells you your coordinates. I wanted to build it so much as a kid, but never could. It’s the sort of thing that really fired my imagination and helped me fall in love with computers.