DriveWire is still very much a thing - the original hasn’t been updated in quite some time, but the new software to do this is called pyDriveWire:
https://github.com/n6il/pyDriveWire
You need a cable to connect between the coco and the computer:
https://www.cocopedia.com/wiki/index.php/How_to_build_a_DriveWire_serial_cable
http://colorcomputer.net/serialcable.php
I’ve found them for sale every now and then as well, though they are pretty easy to make too.
You’ll also need to load a Drivewire capable DOS (like HDB-DOS.) You can get a cartridge that does it or even load it from tape / audio.
Once you get it going though Drivewire (or pydrivewire) has a ton of features and is a lot of fun to play with.
Let me know if you have any questions or problems.