An Interview With Bil Herd - Zany Z80 Zygology
Bil Herd, a recovering Commodore engineer, recounts the chaotic development of the Commodore 128, explaining how they integrated a Z80 processor to ensure CPM compatibility and bypass TI interference. He details the extreme time pressures of the 1985 CES cycle, describing how the team used 'dirty design' tricks like phase-locked clocks and hand-wired jumpers to fix metastability and signal reflection issues in custom NMOS chips. Herd also discusses the company's flat, high-stress culture under Jack Tramiel, the transition from hand-taped layouts to early CAD, and the eventual cancellation of the Commodore LCD laptop project.