Though FPGAs are a dominant implementation medium for digital circuits
, they do not support asynchronous circuits. This is a significant pro
blem because many aspects of glue logic and communication interfaces i
nvolve asynchronous elements, or require the interconnection of synchr
onous components operating under independent clocks. The authors descr
ibe the Montage FPGA, which explicitly supports asynchronous circuit i
mplementation, and its mapping software.