Tag: ibm xt

Adapts a modern ATX power supply to an IBM XT and recreates the missing -5 V rail.

Retro Electronics listed one board in stock on 2026-07-25. The board does not include an AT P8/P9 connector or its cables; the buyer must supply and solder them.

Builds a compact modular IBM PC/XT-compatible computer with an 8088 or NEC V20, up to 640 KB of base RAM, optional upper memory, and 8-bit ISA expansion.

The GPL-3.0 project provides KiCad files, Gerbers, a bill of materials, BIOS, programmable-logic files, and build instructions. Retro Electronics had six bare ENIG PCBs in stock on 2026-07-27; every component and all assembly are excluded. Weird Electronics' board and complete-kit listings were temporarily unavailable while the seller takes a break through August 20, 2026. A separate assembled-board listing had been sold out since May 11, 2026. Weird Electronics sells a Version 1.4 PCB with larger Flash-ROM support, while the repository README documents layouts through Version 1.3; follow the documentation for the board actually supplied.

Programmed replacement ROM variants for diagnosing IBM PC, XT, and AT motherboard faults.

All three machine-family variants were listed in stock on 2026-07-25. Each replaces original motherboard ROM hardware temporarily; match the exact machine and sockets, observe chip orientation, and retain the original ROMs.