https://andrewdorey.com/ Retro computers, electronics projects and other tech articles from Andrew Dorey 2026 Andrew Dorey Wed, 15 Apr 2026 06:33:14 +0100 restoring-a-bbc-micro-computer-part-3 https://andrewdorey.com/post/restoring-a-bbc-micro-computer-part-3 More upgrades to my BBC Micro Model B computer. Adding a floppy drive and an SD card interface. Fri, 21 Nov 2025 12:20:20 Z monroe-l-200x-mechanical-calculator https://andrewdorey.com/post/monroe-l-200x-mechanical-calculator Attempts to repair a vintage masterpiece of engineering from the mid-20th century. Sun, 16 Nov 2025 12:17:22 Z apple-macintosh-lc-software https://andrewdorey.com/post/apple-macintosh-lc-software Floppy disks, Greaseweazles, Serial Ports and BlueSCSI. The different ways you can install software on retro computers. Fri, 05 Sep 2025 16:52:04 +0100 apple-macintosh-lc-repair https://andrewdorey.com/post/apple-macintosh-lc-repair My latest restoration project is a vintage Apple Macintosh LC (model M0350) from 1990. It came complete in its original box, along with a keyboard, mouse, power cables, and a selection of floppy disks. Sun, 10 Aug 2025 18:19:16 +0100 amstrad-cpc-464-repair https://andrewdorey.com/post/amstrad-cpc-464-repair Repairing an Amstrad CPC 464 from the mid 1980s. Mon, 24 Mar 2025 16:40:21 Z atari-st-memory-upgrade https://andrewdorey.com/post/atari-st-memory-upgrade Installing a Marpet Developments RAM upgrade kit in the recently refurbished Atari 1040 STFM. Sat, 15 Feb 2025 15:55:58 Z atari-st-repairs-and-restoration https://andrewdorey.com/post/atari-st-repairs-and-restoration The latest addition to the collection of old classic computers came from the same place as most of my other computers, eBay. Two Atari ST computers a 520ST and 1040ST. Both in need of repair and restoration. Wed, 05 Feb 2025 18:14:10 Z restoring-a-bbc-micro-computer-part-2 https://andrewdorey.com/post/restoring-a-bbc-micro-computer-part-2 In this second instalment of the BBC Micro restoration series, I tackle a memory fault that caused strange graphical glitches on the display. Diagnosing the issue with a BASIC program, identifying the faulty memory chip, and carefully replacing it, restored the BBC Micro to its former glory. Sun, 12 Jan 2025 16:03:52 Z restoring-a-bbc-micro-computer-part-1 https://andrewdorey.com/post/restoring-a-bbc-micro-computer-part-1 A new addition to the collection, a BBC Micro computer from 1982. Manufactured by Acorn Computers, it is in need of restoration and repair. Sat, 28 Dec 2024 12:21:47 Z welcome https://andrewdorey.com/post/welcome Thank you for taking the time to visit my blog. This blog is a place where I will share my experiences repairing and restoring retro computers and electronic equipment.  Mon, 16 Dec 2024 12:26:19 Z