Travis Smith, the designer of TennsyROM, has just posted an updated release on his project.
Since the last update, I’ve added MIDI card emulation (Sequential/Datel/Passport/Sentech) to use your USB MIDI keyboard to play with Cynthcart, SIDWizard, etc.
Swiftlink cartridge + 38.4k modem emulation has also recently been added. This allows you to connect to the internet (BBSs, etc) using the Ethernet connection.
All the same super fast-load features are still there, and a few more.
Let me know if there are questions or interest in Beta testing or collaboration. Thank you!
For more information check out the TeensyROM Github Page.
TeensyROM is based on the Teensy 4.1 Development Board by PJRC.