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Downtown Doug Brown

downtowndougbrown.com

2026

Apple’s Performa in-store demo software from 1993original ↗
22 Sept 2026
Fixing an NZXT Signal 4K30 part 2: the green/pink video bugoriginal ↗
13 Sept 2026
Fixing an eMachines EL1200 BIOS bug with Claudeoriginal ↗
23 Aug 2026

2025

Finding a broken trace on my old Mac with the help of its ROM diagnosticsoriginal ↗
30 Dec 2025
Debugging BeagleBoard USB boot with a sniffer: fixing omap_loader on modern PCsoriginal ↗
8 Nov 2025
An update about the hidden Performa 550 recovery partitionoriginal ↗
28 Aug 2025
Finding a 27-year-old easter egg in the Power Mac G3 ROMoriginal ↗
24 Jun 2025
Modifying an HDMI dummy plug’s EDID using a Raspberry Pioriginal ↗
15 Jun 2025
Please don’t ship heavy, fragile vintage computers. They will be destroyed.original ↗
25 May 2025
How I fixed the infamous Basilisk II Windows “Black Screen” bug in 2013original ↗
15 May 2025
Apple’s long-lost hidden recovery partition from 1994 has been foundoriginal ↗
15 Mar 2025
The gooey rubber that’s slowly ruining old hard drivesoriginal ↗
2 Mar 2025
The invalid 68030 instruction that accidentally allowed the Mac Classic II to successfully boot uporiginal ↗
25 Jan 2025
Easy repair of a defective NZXT Signal 4K30 capture cardoriginal ↗
7 Jan 2025

2024

How webcams with focus control work (Razer Kiyo Pro repair)original ↗
30 Dec 2024
The capacitor that Apple soldered incorrectly at the factoryoriginal ↗
27 Nov 2024
Hardware repair of an Elgato HD60 S that only worked on Macoriginal ↗
25 Oct 2024
Are wireless gamepads terrible? Mario Maker TAS playback with an RP2040original ↗
15 Oct 2024
Fixing an Elgato HD60 S HDMI capture device with the help of Ghidraoriginal ↗
15 Sept 2024
Upgrading my Chumby 8 kernel part 13: the endoriginal ↗
3 Aug 2024
Fixing more cheap Altera USB Blaster clones: CPLD adventuresoriginal ↗
27 Jul 2024
I fixed a 6-year-old .deb installation bug in Ubuntu MATE and Xubuntuoriginal ↗
10 Jul 2024
Upgrading my Chumby 8 kernel part 12: UART woesoriginal ↗
4 Jul 2024
Playing 1080p H.264 video on my old 256 MB Raspberry Pioriginal ↗
30 Jun 2024
Upgrading my Chumby 8 kernel part 11: SD/CF card readeroriginal ↗
21 Jun 2024
Fixing a knockoff Altera USB Blaster that never workedoriginal ↗
9 Jun 2024
Upgrading my Chumby 8 kernel part 10: RTCoriginal ↗
2 Jun 2024
How to fix Windows 10 KB5034441 update installation error 0x80070643original ↗
4 May 2024
Why is my CPU usage always 100%? (Upgrading my Chumby 8 kernel part 9)original ↗
26 Apr 2024
Upgrading my Chumby 8 kernel part 8: audiooriginal ↗
15 Apr 2024

2023

More fun with Apple’s internal tools: creating a PDS cardoriginal ↗
30 Dec 2023
How Apple’s developers reflashed Mac ROMs in the ’90soriginal ↗
25 Nov 2023
Upgrading my Chumby 8 kernel part 7: touchscreenoriginal ↗
3 Nov 2023
Revisiting programmable Mac ROM SIMMs in Quadrasoriginal ↗
19 Sept 2023
Porting my Mac ROM SIMM programmer from AVR to ARMoriginal ↗
10 Sept 2023
How am I supposed to safely disable this warning on ARM GCC?original ↗
2 Sept 2023
How to create a Qt 5 ARM/Intel universal binary for Macoriginal ↗
28 Aug 2023
Upgrading my Chumby 8 kernel part 6: PWM backlightoriginal ↗
12 Aug 2023
Building Alex Taradov’s open-source USB snifferoriginal ↗
6 Aug 2023
Upgrading my Chumby 8 kernel part 5: graphicsoriginal ↗
11 Jun 2023
What happened with ASUS routers this morning?original ↗
18 May 2023
Diagnosing and repairing a Brother fax/printer USB failureoriginal ↗
23 Apr 2023
Upgrading my Chumby 8 kernel part 4: reboot/powerofforiginal ↗
16 Mar 2023
Customizing the startup chime on a 1999 G3 iMacoriginal ↗
4 Mar 2023
Upgrading my Chumby 8 kernel part 3: Wi-Fioriginal ↗
16 Jan 2023

2022

Upgrading my Chumby 8 kernel part 2: Initial Linux bootoriginal ↗
28 Dec 2022
Upgrading my old Chumby 8 Linux kernel part 1: U-Bootoriginal ↗
18 Dec 2022
Getting ChatGPT to write a Linux kernel module for meoriginal ↗
6 Dec 2022
Solving my truck’s TPMS sensor problem with the help of an RTL-SDR dongleoriginal ↗
22 Aug 2022
A small update on my Windows 10 upload speed problemoriginal ↗
29 May 2022
Why can’t Windows 10 make use of all my upstream internet bandwidth?original ↗
23 May 2022
Fun with font rendering consistency in Pythonoriginal ↗
26 Mar 2022

2021

Upgrading a motherboard’s BIOS/UEFI (the hard way)original ↗
19 Dec 2021
How to run Ubuntu 20.04 server with only 256 MB of RAMoriginal ↗
6 Jun 2021
Finding and fixing a VMware Xorg video display bug using GStreameroriginal ↗
9 Apr 2021
Tracking down a segfault that suddenly started happeningoriginal ↗
18 Jan 2021

2020

Using Apple EarPods with a Windows or Linux PC (working mic and buttons)original ↗
23 Sept 2020
Hacking up a fix for the broken AppleTalk kernel module in Linux 5.1 and neweroriginal ↗
1 Aug 2020
Repairing a Microsoft IntelliMouse Explorer 4.0original ↗
25 Jul 2020
Fixing my dead Intel DX58SO motherboardoriginal ↗
10 May 2020

2019

Fix: Dell Inspiron 3650 won’t boot, powers itself on and off every 5 secondsoriginal ↗
29 Jun 2019
Adventures of putting 16 GB of RAM in a motherboard that doesn’t support itoriginal ↗
4 Apr 2019

2018

USB mass storage with embedded devices: tips and quirksoriginal ↗
8 Dec 2018
Connecting an RCA Viking Pro 10.1″ tablet to your computer through USBoriginal ↗
14 Aug 2018
Fix: Lenovo IdeaPad Z510 unable to run system recoveryoriginal ↗
12 May 2018
Fix: Ubuntu MATE scrollbar click jumps to click position after 16.04 to 18.04 upgradeoriginal ↗
28 Apr 2018
Fix: Ubuntu MATE network notification icon missing after 18.04 upgradeoriginal ↗
28 Apr 2018
Fix: Ubuntu MATE 18.04 login screen is empty after upgrade from 16.04original ↗
28 Apr 2018
Mounting a Windows 98 computer’s SMB share in Linuxoriginal ↗
13 Feb 2018

2017

Virtualizing Mac OS X 10.4 with VMwareoriginal ↗
2 Oct 2017
Generating an Excel .xls file with a microcontrolleroriginal ↗
23 Jul 2017
Connecting an iOS device to an Ethernet networkoriginal ↗
22 May 2017
Windows 10 upgrade fails with error 0x800703edoriginal ↗
16 May 2017
Fix: Volume list appears empty on AppleTalk clients with netatalk 2.2.5 installed with Ubuntu 16.04original ↗
16 May 2017
Hosting Ubuntu 16.04 Desktop Live Install ISO on a PXE netboot server (BIOS and UEFI simultaneously)original ↗
23 Mar 2017

2016

Fix for USB serial port being opened by ModemManager at startuporiginal ↗
26 Oct 2016

2015

Fixing broken Huawei H110C displayoriginal ↗
10 Jun 2015
Explanation of the Macintosh II/IIx power on/off circuitoriginal ↗
1 Mar 2015

2014

Detecting parallel ports and their I/O addresses in Windowsoriginal ↗
21 Nov 2014
Microcontrollers: UARTsoriginal ↗
16 Aug 2014
Creating Python bindings for a Qt library in Ubuntu 14.04original ↗
15 Aug 2014
Using a Willem programmer in Linux with Wineoriginal ↗
15 Aug 2014
Automatically bringing up your CAN adapter in Ubuntu 14.04original ↗
30 Jul 2014
Soldering using solder paste, a dispenser, and a toaster ovenoriginal ↗
13 Apr 2014
Linux udev rulesoriginal ↗
3 Mar 2014
Automatically compiling SVN revision into a Qt program on Linuxoriginal ↗
14 Feb 2014

2013

Linux – custom serial baud ratesoriginal ↗
14 Nov 2013
Mac triple-boot setup (Mac OS X 10.6, Windows XP, Ubuntu 13.04)original ↗
6 Aug 2013
Parallel Port Testeroriginal ↗
23 Jun 2013
Willem programmers with add-on parallel port cards: More compatibility notesoriginal ↗
17 Jun 2013
Legacy Apple Backup file format on floppy disksoriginal ↗
9 Jun 2013
Homebrew SNES 4 player multitap adapteroriginal ↗
4 Apr 2013
Getting X-CTU in Wine to detect your serial portsoriginal ↗
30 Mar 2013
Microcontrollers: Interrupt-safe ring buffersoriginal ↗
12 Jan 2013
8 MB Mac ROM SIMMoriginal ↗
2 Jan 2013

2012

WordPress, lighttpd, and WP Super Cache without mod_magnetoriginal ↗
26 Dec 2012
Tethering iPhone 5 over USB on Ubuntu 12.10 (ugly hack)original ↗
23 Dec 2012
Mac ROM SIMM programmeroriginal ↗
13 Aug 2012
Controlling Linkskey LKU-UA02 from Linux and Mac OS Xoriginal ↗
1 Aug 2012
Power Macintosh G3 Blue and White custom startup soundoriginal ↗
14 Jul 2012
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