I want to make Atari joystick (5 wires plus ground so 5 inputs) to USB adapter to use the controller on PC. I've looked, it seems 32u4 has built in USB support but it does not come in DIP and it's a bit of a pain in the butt to wire deadbug on a small chip.
Is there other option? Maybe using ATTiny84 (9 IO pins if external clock is used, 4 available after I add in controller port) but most of ATTiny doesn't have its own serial pins. Can ATTiny bit bang over USB and fake itself as HID controller? The next smallest I could figure out is to use Arduino Pro board with built in USB.
DIP preferably for deadbug wiring, external clock is an option if the chip needs to run at specific frequency.