USB has a bootstrap profile mode, intended for keyboard/mouse for a simple BIOS routine during booting and in the BIOS setup program.
Do contemporary PC BIOSes not need that mode, i.e., can use the same USB profile that a Windows HID uses?
Goal: Microprocessor with USB that can send a string upon pushing a button on the microprocessor, and that string will work with either the BIOS or with Windows' HID drivers.
BIOS and Windows must detect device.
I suspect that BIOSes of the last 2 years or so don't need the special boot profile? Yes?