Upgraded the company’s base station firmware and hardware , implementing flow control, improve error detection/correction and increase throughput, thus extending the life of a key company product.
Challenges:
Upgrading clock rate Z80 processor causes memory faults. Read data book and debugged timing with storage oscilloscope.
Error checking consisted of a check-sum and sending data packets twice. Employed 1 1/2 times Viterbi encoding,
interleaving and CRCs to correct and check data packets.