[Fw_Os_Forum] Capturing output from EFI loader on systems with no serial port

[Brett Stahlman]

What is the best way to capture log output and/or debug a UEFI loader
on a system that has USB but no serial port? Is there some way to
redirect output to the USB serial ports? Alternatively, is there
something like EFI_SERIAL_IO_PROTOCOL for USB?

Thanks,
Brett S.