Project Description Rowhammer haunted us for the better part of the past decade. Most DDR3 modules were found to be susceptible to this vulnerability which can compromise data directly inside the memory cells. What made it so scary was the fact that it could be exploited from software on PCs, clouds, smartphones, over…
The RISC-V version of uLisp is designed to support microcontroller boards based on the RISC-V processor.
The revolutionary Intel 8086 microprocessor was introduced 42 years ago this month so I've been studying its die. 1 I came across two 8...
If you’ve been unable to create a bootable external disk to use with your M1 Mac, this explains what you need and its limitations and quirks.
A common myth about USB keyboards is that they can only support 6-key rollover, and not report more than 6 keys being pressed at a time. In fact, this is wholly untrue; the USB HID device class can support full N-key rollover (NKRO). While keyboards which purport to support USB NKRO are now common, some of them have…
For a long time when I’ve wanted to test the latency of computers and UIs I’ve used the Is It Snappy app with my iPhone’s high speed camera to count frames between when I press a key and when the screen changes. However the problem with that is it takes a while to find the exact frames you want, which is annoying when…
I bought a Pinebook Pro in the first batch, and have been using it on and off for several months now. Some people I know wanted to know if ...
AndreGarzia.com website
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
Modern Apple computers can no longer be fully used and maintained in 100% offline environments, or in ways that will reasonably ensure that the computer is…
What is electricity? This question is impossible to answer because the word " Electricity " has several contradictory meanings. These different meanings are incompatible, and the contradictions confuse everyone. If you don't understand electricity, you're not alone. Even teachers, engineers, and scientists have a hard…
The Xen Project is excited to share that the Xen Hypervisor now runs on Raspberry Pi. This is an exciting step for both hobbyists and industries. Read more to learn about how Xen now runs on RPi and how to get started. Written by Stefano Stabellini and Roman Shaposhnik, originally
Can you run a 8086 PC-XT emulation with 640K RAM, 80×25 CGA composite video and a 1.44MB MS-DOS disk on a ESP12E without additional components? Yes, you can and I did. The CPU emulator is a po…
In 2004 I built the first AppleCrate , an 8-board system, as an inexpensive, easy to program vehicle for experiments in parallel programming�a kind of "blade server" for the Apple II, if you will! AppleCrate I (at the time I didn't realize that it was number "I" ;-) was great fun, and it enabled some very interesting…
From OP 2230, "Workmanship and Design Practices for Electronic Equipment" , published by the direction of the chief of the Bureau of Naval Weapons , 1 December, 1962. pp. 7-9 --- 7-14.
As I was debugging a wireless mouse based on a 2.4 GHz proprietary protocol, I wanted to detect the transmitted signals. Note that I purposefully wrote “detect”: It was sufficient to see how often the transmission occurred (and if at all) and whether the link was unidirectional – i.e., only the mouse transmits and the…
At the end of 2019, I traded in my two-year-old 15-inch MacBook Pro, sold off some older Apple gear (an iPad and older iPhones), and decided to spring for one of the newer 16-inch laptops. I had us…
When I was young I owned a PlayStation 1 (PS1). It was one of the first, if not the first, game consoles I owned and it had a profound effect on my future. I can trace the history of how I got involved in computers back to playing and modding
Iran’s new military satellite, NOUR 01, most interesting fact may not be that it resembles a college engineering experiment but rather that it may have a connection to a Mexican military payl…
Analysis of electric vehicle battery health of 22K+ EVs reveals a 2.3% average battery degradation rate. High-power DC fast charging is the top risk factor.
The GDP was exclusively object oriented - normal linear memory access wasn't allowed, and there was hardware support for data hiding, methods, inheritance, late binding, and access protection, and it was promoted as being ideal for the Ada programming language. To enforce this, permission and type checks for every…
How to connect a 68k Mac to the internet without an ethernet card!
Last year, I wrote a blog post titled The Raspberry Pi 4 needs a fan. And in a video to go along with that post, I detailed the process of drilling out a hole in the top of the official Pi 4 case and installing a 5v fan inside. But that solution wasn't great. The fan was a little loud and annoying, and would stay on…
All you need is a text editor, a makefile and a USB-serial cable.
TSMC showed the power of modularization, and now they are core to the U.S. national security strategy.
December 10, 2020 – Post updated for the extension of the T4g free-trial until March 31, 2021. During the free-trial period, customers who run a t4g.micro instance will automatically get 750 free hours per month deducted from their bill during each month. T4g free-trial will be available in addition to the existing…
