This turned up on hacker news today: JTAG ‘Hacking’ the Original Xbox in 2023 – Using Intel CPU JTAG to dump the secret bootrom in Microsoft’s original Xbox. There’s some info being collected on github: github.com/Necrosys/x86-JTAG-Information.
Category Archives: Programming
Time and Space Complexity
This is good: Time and Space Complexity. If I find myself needing to explain algorithmic complexity to someone I will refer them to this.
Interlude #11: Playing with WeAct Studio Epaper Modules on ESP32-C3 MCU | In The Lab With Jay Jay
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
In this video we play around with the 2.13″ and 2.9″ WeAct Studio Epaper Modules available here: WeAct 2.9” 2.13″ 2.9 2.13 Inch Epaper Module E-paper E-Ink EInk Display Screen SPI Black-White Black-White-Red.
As I mention in the video I was having a hard time getting good solder joints from my Horusdy Soldering Station. This was annoying me so much that I went and purchased a new soldering iron! My new iron is an Metcal PS-900 Soldering Station and I love it! This is what a soldering iron should be!
We use the Arduino IDE and the sample code from WeAct Studio but we don’t successfully load content into our Epaper Module.
We use the Rigol MSO5074 Mixed Signal Oscilloscope to and the Rigol PLA2216 Logic Probe to wire up a Logic Analyzer to instrument out circuit, but we don’t follow through with that in the end. We run out of time. We will try again another day.
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Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
Yum Cha 58-pcs Stainless Steel Thread Pitch Gauge![]() |
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AMBA specification
Today I learned of the Advanced Microcontroller Bus Architecture. There is detailed information to be found on the ARM website: AMBA Specifications.
Debugging
I’ve been reading Debugging: The 9 Indispensable Rules for Finding Even the Most Elusive Software and Hardware Problems. My mate @indigo suggested I read David A. Wheeler’s summary of it over here: David A. Wheeler’s Review of Debugging by David J. Agans. I know David A. Wheeler from his work on sloccount.
Essential CLI/TUI Tools for Developers
There are some interesting tools to learn about here: Essential CLI/TUI Tools for Developers.
Mail Call #16: METCAL PS-900; Peak Atlas DCA75 Pro, LCR45, ESR70; ESP32; Pi Zero, Pico; and More!
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
In this video I receive the following equipment in the mail:
- ESP32-CAM-MB WiFi Module Serial to WiFi ESP32 CAM Development Board 5V Bluetooth with OV2640 Camera DIY
- Red Board GY-NEO6MV2 Flight Control GPS Module APM2.5 Flight Control NEO-6M
- RP2040-Zero RP2040 for Raspberry Pi Microcontroller PICO Development Board Module Dual-core Cortex M0+ Processor 2MB Flash
- Raspberry Pi Pico Board RP2040 PICO W Dual-Core 264KB ARM Low-Power Microcomputers High-Performance Cortex-M0+ Processor
- WeAct ESP32 ESP-32 ESP32C3 ESP32-C3FH4 Development Board Wireless WiFi Bluetooth-compatible Module Micropython
- WeAct BlackPill STM32F411CEU6 STM32F4 STM32 Core Board Learning Board Development Micropython
- 4Pack Original [Apple MFi Certified] Charger Lightning to USB Charging Cable 6FT Cord Compatible iPhone 14/13/12/11 Pro/11/XS MAX/XR/8/7/6s Plus,iPad Pro/Air/Mini,iPod Touch
- Star Schema The Complete Reference
- The Architecture of Open Source Applications, Volume II
- METCAL PS-900 Soldering Station
- METCAL SFV-CH10, 30° Chisel, 1 mm Soldering Iron Tip
- METCAL SFV-CH20, 30° Chisel, 2 mm Soldering Iron Tip
- METCAL SFV-CN05, Conical, 0.5 mm Soldering Iron Tip
- Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer
- Peak Electronic Design Atlas LCR45 LCR Meter
- Peak Electronic Design Atlas ESR70 Gold ESR Meter
As I mentioned the open-source architecture books are available free online: The Architecture of Open Source Applications.
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
Aussishop Calipers![]() |
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Mail Call #15: iPhone 6s, USB Accessories, Software Books, IEC Power Adapters, and More!
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
In this video I open the stuff that has arrived in the mail recently:
- Original Quality USB Charger Cable for iPhone 14 8 7 6S Plus 13 12 Pro XS Max XR SE Fast Charging Cord Data Sync Line 1m 2m 3m (0.2m)
- USED EX-DEMO | iPhone 6S | 64GB | Space Grey | Unlocked
- The Architecture of Open Source Applications
- 500 Lines or Less
- IEC 320 C14 to C13 Left Right Angle AC Adapter IEC 3Pole IEC 320 3pin Male to Female extend 90 Degree Down Up Angle AC converter (Type 1, 2, 3, 4)
- Universal IEC320 C13 C14 to C5 C6 C7 C8 C19 C20 C21 Convert Connector UPS PDU Male to Female EU US power plug adapter Socket (C14 to C5 and C14 to C7)
- 8pcs CPU IC Glue Remover Phone Repair Tool C Chip Repair Thin Blades Piratical Repair Hand Tool For Mobile Phone Computer
- NEWACALOX 4 PCB Circuit Board Holder with Strong Magnetic Base for Soldering Repair, Modeling, DIY, Jewelry and Hobbies
- USB Tester DC Type-C PD Digital Voltmeter Amper Voltage Current Monitor Ammeter Detector Power Bank Charger Capacity Meter 6.5A
- PP Cutting Mat Workbench Patchwork Cut Pad Sewing Manual DIY Knife Engraving Leather Cutter Board Single Side Underlay (A5 green)
- Power Bank Charger Indicator 4-30V USB Color Screen Digital Display Voltage Current Charger Detector
- Blue 10CM/20CM/30CM USB 3.0 Extension Cable Type A Male to Female (3x 10cm; 2x 20cm; 3x 30cm)
- RIDEN AT35 5 digits USB 3.0 color LCD Voltmeter ammeter voltage current meter multimeter power bank USB Tester ⭐
I mention that I’m working on a new book teardown for God Created the Integers.
The epaper modules I’m working with are these ones: WeAct 2.9” 2.13″ 2.9 2.13 Inch Epaper Module E-paper E-Ink EInk Display Screen SPI Black-White Black-White-Red and the microcontrollers I’m experimenting with are these ones: WeAct ESP32 ESP-32 ESP32C3 ESP32-C3FH4 Development Board Wireless WiFi Bluetooth-compatible Module Micropython.
The Arduino Nano you see is one of these: Mini / Type-C / Micro USB Nano 3.0 With the bootloader compatible Nano controller for arduino CH340 USB driver 16Mhz ATMEGA328P connected to an OLED display like this: 1.3″ OLED Display Module White/Blue Color Drive Chip SH1106 128X64 1.3 inch OLED LCD LED IIC I2C Communicate.
The video I mention about the test clips is this one: Unboxing #9: Unboxing of Sudake SDK07 and SKD08 IC Clip SMD Gripper Test Probe | In The Lab.
If you’re interested in the old iPhone 6s you can find more information at Wikipedia: iPhone 6s or from Apple: iPhone 6s – Technical Specifications.
My iPod touch is 7th generation, you can get more info from Apple: iPod touch (7th generation) – Technical Specifications.
I mention that I listen to di.fm. If you’re into electronic music, check it out.
I keep my notes which I display on my bench iPhones on the web, over here: https://www.jj5.net/display/
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
3ELIGHTING 10″-26″ VESA Wall Mount![]() |
Let’s go shopping!
Trick Out Your Excel Quick Access Toolbar with these Hidden Powerful Features
This was less cool than I thought it might be. Still worth watching though. Trick Out Your Excel Quick Access Toolbar with these Hidden Powerful Features.
Stuff Made Here
Today I discovered a new YouTube channel Stuff Made Here. They had this fun video: What if we made a camera that sees in reverse?