Lopo wrote on Today, 06:37:

Just sent my first PCB revision to fabrication - a reverse-engineered duplicate of the DataExpert 367C motherboard with UniChip […]
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Just sent my first PCB revision to fabrication - a reverse-engineered duplicate of the DataExpert 367C motherboard with UniChip U4800-VLX chipset.
The challenge: there's no datasheet for the U4800-VLX anywhere. All 160 pins had to be mapped from scratch using PCB scans, photos, multimeter tracing, and cross-referencing with other designs (Groza's OPTi 495XLC SBC, Skiselev's SARC RC2016 386SX board).
This v0.1 is essentially a 1:1 copy to verify the reverse engineering is correct. If it works, future revisions will diverge with improvements (ATX power, VLB slots, expanded cache, etc.)

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Fingers crossed! 🤞

This is simply amazing, I commend you for your hard work and look forward to an ATX version.

Worked on my video card Memory Tester Launcher. Boots from a USB stick. It’s just a simple BAT file but consolidates all the memory testing tools in one place and makes sure logs are easy to access.