"Coulston" Computer

The "Coulston" computer, so named for Dr. Chris Coulston at Penn State, was a simple computer used to illustrate the architecture of a complete computer. The computer contained ALUs, barrel shift adders, carry look ahead adders, a control unit, a cpu, a datapath, decoders, full adders, multiplexors, RAM, registers, a register file, and TSBs.

Some of the VHDL components (in PDF format):

• ALU
• Barrel Shift Adder
• 4-bit Carry Look-ahead Adder
• 16-bit Carry Look-ahead Adder
• 32-bit Carry Look-ahead Adder
• The Control Unit
• The main CPU
• The Datapath
• A 5:32 Decoder
• Full Adder
• Nx2x1, Nx4x1, and 32x32x1 multiplexors
• Register File
• Tri State Buffer