Web-based NumWorks calculator OS updater (WebDFU fork)
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README.md

webdfu_numworks

This is a fork from the WebDFU demo (WebUSB DFU), but tailored for dumping/flashing the NumWorks calculator.

Note from the original Readme:

WebUSB is currently only supported by Chromium / Google Chrome.

For Chrome to communicate with a USB device, it must have permission to access the device and the operating system must be able to load a generic driver that libusb can talk to.

On Windows, that means that an appropriate WinUSB/libusb driver must first be installed. This can be done manually with programs such as Zadig or automatically (sometimes...) with WCID

On Linux, that means that the current user must have permission to access the device.

On macOS, it should work directly.