100MHz Next Gen TTL 6502

Follow the progress of a new Next Generation TTL 6502 targeting a 100MHz clock-rate!

An often repeated refrain is that homebuilt CPUs are constrained to single-digit clock-rates by limitations inherent in discrete-component design. But we know that’s not true. The C74-6502 achieved a 20MHz clock-rate while still being a full-fledged cycle-accurate 6502. It’s worth asking, then, could a humble TTL 6502 reach that rarified air above 100MHz? It’s not clear such a thing is possible, but the challenge is on!

See the project forum thread.