Turbo Clock Switcher - Engineering Application
Clock profile switcher for timing-sensitive software and test harnesses, enabling controlled transitions between true legacy rates and turbo operation.
- Profiles
- 4.77MHz, 8MHz, 12MHz, board turbo
- Switching Logic
- Debounced hardware line with deterministic latch state
- Feedback
- Status LED map plus software verification hooks
- Compatibility
- AT clones, 386SX, selected 486DX boards
- Use Cases
- Cycle-sensitive DOS software and diagnostics harnesses
- Field Harness
- Front-panel and relay control compatible
Software Compatibility
The PC1640 was sufficiently powerful to run major office software of the late 1980s and early 1990s: WordPerfect 5.1, Microsoft Word 4/5 for DOS, Lotus 1-2-3, Matlab, dBase III+, and Ashton-Tate's Framework II. It shipped with Digital Research's GEM as a graphical shell and could also run GEOS Ensemble (up to v2.1) and Microsoft Windows up to 3.0 in real mode. Games like The Secret of Monkey Island, Maniac Mansion, and Prince of Persia all ran on the 8086 CPU.
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