1-bit Microprocessor This project, in VHDL, implements a single-bit microprocessor based on the now obsolete Motorola MC14500B Industrial Control Unit. The ICU is basically a logic sequencer with a 4-bit instruction unit (16-instructions). In addition to the ICU, the project has a 12-bit program counter module, jump/branch units and 16-bits of I/O.
8b10b Encoder/Decoder This project, written in generic synthesizable VHDL, provides two separate cores for encoding and decoding byte data according to the 8b/10b protocol. 8b/10b is widely used in high speed serial communication standards that need a run-length limited, DC balanced data stream for reliable data transmission and clock recovery. The encoder accepts a parallel 8-bit raw input and generates a parallel 10-bit encoded value based on the data along with a running disparity value. The decoder does the inverse, providing a decoded 8-bit value from the 10-bit encoded input. These cores can be easily incorporated into serializer/deserializer (serdes) communications applications.
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