Designed by Sophie Wilson and Steve Furber before there was an ARM Ltd., the Acorn RISC Machine was the first of a line of processors that power our cell phones and tablets today. Unlike our projects based on microscope images, the Visual ARM was created from a resurrected .cif chip layout file, used under our license agreement with ARM. We also photographed one of the few ARM1 chips at very high resolution, and our photograph is featured at the Centre for Computing History in Cambridge.
Credit goes to ARM founding engineers John Biggs for inspiring the project, discovering the tape, and recovering a usable .cif file, Lee Smith for spotting the variable record format used to encode the file (an artifact of the VMS on Acorn's VAX that at first appeared to be widespread corruption of the file), to Cambridge University Computing Services for reading the Exabyte tape, and to ARM founder Dave Howard for help unraveling the VLSI CIF dialect. Our chip simulation and visualization was developed by Barry Silverman, Brian Silverman, Ed Spittles, and Greg James.
- Micro-SD card slot
- mini-HDMI socket for 1080p60 video output
- Micro-USB sockets for data and power
- Identical pinout to Model A+/B+/2B
- An unpopulated composite video header
- "Our smallest ever form factor, at 65mm x 30mm x 5mm"
New submitter graffitiwriter adds a note that the newest Pi has "already been turned into a retro gaming console. It turns out the Pi Zero is more than capable of running Retro Pie and other emulators, and even has a video output that lets you play games on an old CRT TV."
It was not immediately clear who destroyed the main electric pylons on Friday and Sunday, but the blasted-away stump of at least one tower near the demonstrators was wrapped in the distinctive blue Crimean Tatar flag with a yellow trident in the upper left-hand corner. Tatar activists blockaded the site, saying they would prevent repairs until Russia released political prisoners and allowed international organizations to monitor human rights in Crimea. The activists claim that the 300,000-member minority has faced systematic repression since Russia annexed the peninsula in March 2014. In the meantime Russia is building an "energy bridge" to Crimea that officials hope will supply most of the peninsula's need and its first phase will begin operating by the end of this year.
Defending the power grid in the United States is challenging from an organizational point of view. There are about 3,200 utilities, all of which operate a portion of the electricity grid, but most of these individual networks are interconnected. The latest version of The Department of Defense's Cyber Strategy has as its third strategic goal, "Be prepared to defend the U.S. homeland and U.S. vital interests from disruptive or destructive cyberattacks of significant consequence."