AmigaOS 3.1.4

The official update you’ve been waiting for.The new, cleaned-up, polished Amiga operating system for your 68K machine fixes all the small annoyances that have piled up over the years. Originally intended as a bug-fix release, it also modernizes many system components previously upgraded in OS 3.9. Contrary to its modest revision number, AmigaOS 3.1.4 is arguably as large an upgrade as OS 3.9 was, and surpasses it in stability and robustness. Over 320K of release notes cover almost every aspect of your favourite classic AmigaOS — from bootmenu to datatypes.Some highlights: Over 20 Kickstart ROM modules and many more disk-based core OS components were fixed, updated, or added.Native support for all Motorola 68000-68060 CPUs, and a more robust Auto-Configuration process.Support for large hard disks, including boot, for any OS 2.x/3.x-compliant controller driver supporting HD_SCSI_CMD, TD_64 and/or NSD. Dedicated boot partitions are a thing of the past, even on legacy devices. You can


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Dropbox traffic infrastructure: Edge network

In this post we will describe the Edge network part of Dropbox traffic infrastructure. This is an extended transcript of our NginxConf 2018 presentation. Around the same time last year we described low-level aspects of our infra in the Optimizing web servers for high throughput and low latency post. This time we’ll cover higher-level things like our points of presence around the world, GSLB, RUM DNS, L4 loadbalancers, nginx setup and its dynamic configuration, and a bit of gRPC proxying.
Dropbox scale
Dropbox has more than half a billion registered users who trust us with exabytes of data and petabytes of corresponding metadata. For the Traffic team this means millions of HTTP requests and terabits of traffic. To support all of that we’ve built an extensive network of points of presence (PoPs) around the world that we call Edge.
Why do we need Edge?
Many of the readers know the basic idea of CDNs:


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How to Play Commodore 64 Games Online for Free

Last month, the Internet Archive added a Commodore 64 emulator to its ever-growing library of historical software, effectively bringing the retro computer/game console to the public domain. Like the Internet Archive’s libraries of MS-DOS and Apple II programs, every program they’ve archived is now available on the…Read more…


Original URL: https://lifehacker.com/how-to-play-commodore-64-games-online-for-free-1829660762

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Art of Prolog 2nd edition in open access

Summary

This new edition of The Art of Prolog contains a number of important changes. Most background sections at the end of each chapter have been updated to take account of important recent research results, the references have been greatly expanded, and more advanced exercises have been added which have been used successfully in teaching the course.Part II, The Prolog Language, has been modified to be compatible with the new Prolog standard, and the chapter on program development has been significantly altered: the predicates defined have been moved to more appropriate chapters, the section on efficiency has been moved to the considerably expanded chapter on cuts and negation, and a new section has been added on stepwise enhancement—a systematic way of constructing Prolog programs developed by Leon Sterling. All but one of the chapters in Part III, Advanced Prolog Programming Techniques, have been substantially changed, with some


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Kahoot, the educational gaming startup, has raised another $15M, now at a $300M valuation

School’s back in session and a startup that’s building games to help students learn has moved to the top of the class. Kahoot — the educational gaming startup out of Norway that has been a quick hit with schools in the US and elsewhere — today announced that it has raised 126.5 million Norwegian krone (around $15.4 million), its second round this year, at a valuation of about 2.55 billion krone ($300 million), tripling its valuation in 7 months.
For some context, the company raised $17 million in March at a $100 million valuation.
Kahoot has been around since 2006 — originally as a gamefied education app called Lecture Quiz — although its rise in popularity and usage has been a more recent shift, dovetailing with how teachers are increasingly using more learning aids that are in tune with two of the more popular pastimes among kids these days: playing around on devices with screens,


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Internet Archive Launches a Commodore 64 Emulator

The Internet Archive has launched a free, browser-based Commodore 64 Emulator with over 10,500 programs that are “working and tested for at least booting properly.” Interestingly, the emulator comes just before the launch of Commodore’s own C64 Mini. “It’s based off the VICE emulator version 3.2, which is a triumph of engineering,” adds HardOCP.

Read more of this story at Slashdot.


Original URL: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/BjCvWEU9rSQ/internet-archive-launches-a-commodore-64-emulator

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Stellar Smart Contracts

Stellar can be used to build sophisticated smart contracts. Smart contracts are computer programs that can automatically execute an agreement based on programmed logic.
The concept of integrating technology and legal contracts dates back to the 1950s when scholars built computational methods that could enforce legal rules without involving traditional legal processes. Smart contracts were formally defined by Nick Szabo in 1997:

Smart contracts combine protocols with user interfaces to formalize and secure relationships over computer networks. Objectives and principles for the design of these systems are derived from legal principles, economic theory, and theories of reliable and secure protocols.

In recent years, blockchain technology has enabled a new breed of smart contracts with immutable storage of agreement terms, cryptographic authorization, and integrated transfers of value.
For the Stellar Network, smart contracts are manifested as Stellar Smart Contracts. A Stellar Smart Contract (SSC) is expressed as compositions of transactions that are connected and executed


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