Kritik sah

The Radio Shack TRS-80 Colour Computer may never have achieved the sales volume of its competitors from Commodore or Apple, but it offered a surprisingly capable set of hardware. There were three versions, with the final one being a significant upgrade in many ways. There was no upgrade path for owners of version 1 and 2 machines to have a version 3 back in the day, but now thanks to [Felipe Antoniosi] such an upgrade is possible. How? With a Tang Nano 20K FPGA board , of course! The CoCo 3 had a paged memory system for expansion up to 512k, as well as a significantly more capable graphics chip which while compatible with the original Motorola part offered enhanced graphics. The upgrade emulates these, and connects to the CoCo via a set of daughter boards that connect to where the various motherboard chips sat. it offers an HDMI output as well as analog video and enhanced sound capability, bringing the machine firmly into the 21st century. As mods go to classic hardware, this is quit...

For most people, just getting any old microcontroller or system on chip (SoC) from our favorite – or cheapest – vendor is more than good enough. But if you’re really into high assurance computing where every transistor has to be accounted for, you got a bit of a problem. This is basically why [Andrew “Bunnie” Huang] pitched in and had the Baochip-1x produced . This SoC’s design is based heavily on the FPGA-based CPU in the Precursor device , which itself is claimed to be a fully verifiable communicator design. Since it does have an MMU, you can run any software on it that supports the RV32IMAC RISC-V instruction set, with a Coder’s Guide available for those who might feel interested in this SoC, along with the SystemVerilog and Verilog-based sources . In addition to the DIY assembly process, you can even get a physical hardware version, including the ‘Dabao’ evaluation board with a very Raspberry Pi Pico-shaped form factor. Insid...

Years ago, I wrote an article describing different I2C-on-a-connector ecosystems , explaining their strengths, weaknesses, and implementation details, as well as piling on a heap of fun stories. Looking back at it, it’s a great reference article, if I do say so myself. In particular, I highlighted QWIIC, which is a Sparkfun-borne standard for putting 3.3 V I2C on a JST-SH (or compatible) 4-pin connector. I’ve since implemented a fair bit of QWIIC, and grew to like it so much more. I’m here to explain to you why you ought to be putting those JST-SH connectors in everything you design that touches I2C, all the cool things they let you do, where to buy a lot of cheap cables at once, and all the references you could need. I will also tell you about my USB pinout for QWIIC, something you should definitely know about. In2ispensable Interconnect There’s myriads of devices that speak I2C, and all of them are incredibly useful. Environmental sensors, GPIO expanders, A...

LEGO building blocks are a great toy, but every so often a hacker decides to take the little bricks outside of the toy room and make them an integral part of a build. [Adam Turaj] took that idea further than most with his Studprint, a 3D printer that’s 92% LEGO . We aren’t just talking LEGO bricks making up part of the frame here, or even the bed — though that’s obviously the case — but [Adam] goes so far that even the motion system is using LEGO leadscrews to drive the axes of this printer. Is it particularly capable? Well, no. He’s not boasting of a remarkable bed size or high speeds here because that’s really not the point. The point is that he made a printer in LEGO and if you don’t see the fun in that, we don’t know what to tell you. The whole project is open source, and includes the CAD files for the handful of non-LEGO bits you’ll need to mount the electronics, steppers and such. With an unheated bed of ABS bricks, you...

A few times in the life of someone interested in technology, there comes along something which after seeing it, you know the field is never going to be the same again. For a teenage future Hackaday writer this came in seeing  Elite , on a BBC Micro. Nowadays an open world game is normal, but in the mid-1980s it was mind-blowing. Of course, such a powerful piece of software couldn’t be ported to any old computer, so owners of less capable machines were left envious of their more well-heeled friends. It will be a surprise to Commodore Pet owners then, that over four decades later, [David Given] has ported the game to their platform . It’s not such a leap, as the Pet has the same (albeit slower) 6502 as the BBC Micro, and the game requires the Commodore machine to have 32k of memory. So what you get is Elite , but with the Pet’s block graphics rather than the higher-resolution you’d have seen on the newer machines. He admits it doesn’t play well and that the...

This week Jonathan chats with Sattyam Jain about Agent Audit Kit and Agent Airlock. We’re in a brave new world, where anyone can use AI to generate an AI agent. But what keeps those builds secure? And what can we do to prevent AI jailbreaking where it matters? Listen to find out! https://github.com/sattyamjjain agent-audit-kit: https://github.com/sattyamjjain/agent-audit-kit agent-airlock: https://github.com/sattyamjjain/agent-airlock Newsletter: https://theproductionagent.substack.com Did you know you can watch the live recording of the show right on our YouTube Channel ? Have someone you’d like us to interview? Let us know, or have the guest contact us! Take a look at the schedule here . Direct Download in DRM-free MP3. If you’d rather read along, here’s the transcript for this week’s episode . Places to follow the FLOSS Weekly Podcast: Spotify RSS Theme music: “Newer Wave” Kevin MacLeod (incompetech.com)...