Multichannel analyzers, as used in energy dispersive X-ray spectrometers using Si (Li), High Purity Ge, or other types of detectors, receive a series of pulses, generally in the 5 to 10 volt range full scale, which they measure and count in memory. Some are constructed using hardwired digital logic circuits to perform these memory control operations, while others incorporate standard computer memories and central processing units, with programmed logic for storing, displaying and (generally) processing the spectrum, with the advent of ever more powerful and lower cost microcomputers, it becomes increasingly attractive to adapt one to this purpose. We have done so, using an Apple II, and will describe the hardware of the interface, the logic of the data acquisition programs, and the utilization of memory in the computer.