Data processing interface apparatus.

摘要

Input data words of variable data field width are interfaced to a fixed width data bus. The apparatus includes a circuit incorporating a modulo Nc down shifter for translating an Nf bit length input data word into an Nc bit length output data word for interfacing with an Nc bit length data bus and further including mask means for generating a mask when the Nf bit length is not an even multiple of the Nc bit length.