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USCOM(4) Device Drivers Manual USCOM(4)

uscom
simple USB serial adapters

uscom* at uhub?
ucom* at uscom?

The uscom driver supports simple USB serial adapters that don't need a custom driver.
The following devices should work with the uscom driver:
HP 39G 
HP 49G

tty(4), ucom(4), uhub(4), usb(4)

The uscom device driver first appeared in OpenBSD 5.6.
March 25, 2014 OpenBSD-current