The XMOS XS1-L1 (eval) is a development board that utilizes the XMOS XS1-L1 microprocessor. The XS1-L1 is part of XMOS's family of multi-core microcontrollers, specifically designed for high-performance applications in audio, communications, and embedded systems. The "eval" (evaluation) part typically indicates that it's an evaluation or development board meant for developers to experiment with and prototype applications using the XS1-L1 chip.

If you're working with the XMOS XS1-L1 (eval) board, you likely need to install the appropriate Windows drivers to interface with the board for programming, debugging, or running applications. These drivers ensure that Windows can communicate with the hardware through USB or other interfaces.