Multiple width data bus for a microsequencer bus controller system

Abstract

A bus architecture and associated circuitry for providing communication between processors and multiple gate arrays whereby the size of the data being transferred may be either full words of 32-bits or 36-bits per word, or half words of 16-bits or 18-bits per word. Parity generation logic operates on the data to be sent over the bus to generate a parity value from the correct data bits depending on the selected data word size. Parity checking logic operates on the data received from the bus to check the parity of the correct data bits depending on the selected data word size.