  A prototype flash analog-to-digital readout system for cosmic ray detection
at energies below 10^18 eV has been designed and tested at Columbia University
Nevis Laboratories. The electronics consist of an FADC module that digitizes 16
photomultipliers at 40 MHz with 14-bit dynamic range. The module is read out to
a PC (running Linux) through a PCI interface. Taking advantage of the large
bandwidth provided by the PCI bus, we have implemented a software-based data
acquisition system. This note describes the software and electronics, as well
as preliminary tests carried out using a prototype FADC module.
