Hello everyone,

This is my first post.

I wanted to share a PC/XT motherboard I designed, based on the IBM 5160 and influenced by the many Taiwanese turbo clones of the era. I called it the DubaiXTClone.

The main differences from a standard XT design: 8MHz turbo with runtime speed switching, static RAM (no refresh), reduced IC count, 4-layer PCB, and real-time bus activity LEDs driven by otherwise unused gate outputs.

Fully open hardware under CERN-OHL-W v2 — schematics, PCB and PAL source code all included.

Tested with JUKO 2.31, Turbo BIOS 3.1 and others. SVGA Trident, 3COM, RTC, Floppy, and XTIDE all confirmed working in turbo mode.

As a side note, it also runs LMChat (https://github.com/spencer-uk/LMChat), a chat client that connects the board to a local LLM via LMStudio.ai application - ELKS and MS-DOS, both are supported.

GitHub: https://github.com/spencer-uk/DubaiXTClone/

(in the picture: top board DubaiXTClone, bottom IBM5160 - for comparison)

Happy to answer any questions.

~Spencer