Check the listing for details. Ariel PC-C25 DSP Board - Free Shipping. Listed at 30.00 USD. Ariel PC-C25 DSP Board - Free Shipping The Ariel PC-C25 is a Digital Signal Processing board that relies on a Texas Instruments TLC3204x AIC (analog interface chip) connected to the TMS320C25 serial port to provide a single channel of 14-bit A/D and D/A. The PC-C25 is shipped standard with 8k x 16 of data memory and 8k x 16 of program memory. It is a full length board with 8-bit ISA bus XT-style connector. It has an RCA input and an RCA output on the board mounting bracket and a ribbon cable connector for Parallel I/O. These boards were acquired from an auction some time ago. They are in electro-static bags in their original boxes. The bags and boxs are not sealed. It is not known if these boards were used although they look new. It is not know if the boards work and we have no way to test them. They have been sitting in our warehouse for many years. There is no manual or software included, just the board. Used Gear Return Policy: We offer a 7 day guarantee on our used merchandise. If the unit does not work or quits within 7 days of receipt, we will replace or refund your money at our discretion.