We read this article on oddball open-source operating systems by [Bryan Lunduke] of the “Linux Action Show” podcast, and it caused us to play around in an Amiga-like operating system (running as a VM) for an hour. We’re pretty sure that you’ll succumb to the same fate. But even worse, the article is just the first in a series. There goes your weekend hacking productivity for the foreseeable future.
AROS is an open-source, API-compatible rewrite of the Amiga OS. Now, AROS is no fancy-schmancy AmigaOS4. No sir, the AROS project started in 1995 and settled on Amiga OS API version 3.1, and it stays true to its roots.
But this doesn’t mean that you’re going to have to give up the creature comforts of life in the 21st century. Get yourself a full-fledged AROS distribution, like icaros desktop, and you’ll find a pretty beefy ecosystem of applications included. It’s mostly what you’d want out of an Amiga — games, audio, video, and graphics editing software, a WebKit-based browser, and even a super-minimal word processor.
It’s retro, it’s sexy, and it’s fun. Just the ticket for running on that unused craptop gathering dust in the corner. (It’s also reported to run on Raspberry Pi running Linux.) Still not convinced? Lemmings.
Today when you want to upgrade your computer you slap in a card, back in the early 80’s things were not always as simple. When [Carsten] was digging around the house he found his old, and heavily modified Rockwell AIM 65 single board computer, flipped the switch and the primitive 6502 machine popped to life.
Added to the computer was a pile of wires and PCB’s in order to expand the RAM, the I/O to form a “crate bus” and of course tons of LED blinkenlights! On that bus a few cards were installed, including a decoder board to handle all the slots, a monitor controller, a massive GPIO card, and even a universal EEPROM programmer.
If that was not enough there was even a OS upgrade from the standard issue BASIC, to a dual-boot BASIC and FORTH. Though again unlike today where upgrading your OS requires a button click and a reboot, making all these upgrades are planned out on paper, which were scanned for any retro computer buff to pour through.
[Carsten] posted a video of this computer loading the CRT initilization program from a cassette. You can watch, but shouldn’t listen to that video here.
The BBC has developed a computer to be used by thousands of students across the UK. While not very powerful in terms of hardware, it comes with an interpreted language that will get students writing their own code and will launch the careers of an entire generation of web developers. This is, of course, the BBC Micro, a computer introduced in 1981, but is still deeply revered by millions of former students.
Microcontrollers are everywhere now, and the BBC is looking to replicate their success with the micro:bit. Unlike the BBC Micro, this isn’t a proper computer with a keyboard and a monitor. Instead, it’s a microcontroller development platform based on an ARM chip. Now, the micro:bit is getting Python, the BASIC of today, and will assuredly be even more useful in UK classrooms.
The initial development for Python on the micro:bit started down the road of using Microsoft’s TouchDevelop as a browser-based IDE that would send C++ code to an mBed cloud compilation service. A hex file would be generated, this would be downloaded to the local file system, and finally the student would simply drag the hex file over to the micro:bit since it appeared on the desktop as a USB storage device. This was a terrible idea, because MicroPython exists. The current way of running Python on the micro:bit is as simple as plugging it in to a USB port, opening a terminal, and writing some code. It’s the closest you’re ever going to get to a computer with BASIC in ROM, and it’s the best device for millions of 11-year-olds to learn how to code.
Thanks [dassheep] for the tip.
What does it mean to “build your own computer?” Today, it is likely to mean you bought a motherboard, a power supply, and a case and put it all together. You might even have made an embedded computer using a few chips, including an off the shelf CPU. However, there are those guys (like me) who have built entire computers using FPGAs and some (not like me) who have built computers out of TTL chips, discrete components, and even relays and we have covered quite a few of them.
It hasn’t always been that easy. Components are readily available now and relatively cheap (especially considering inflation). In the 1960’s, simple components cost more than you pay for them today and back then your hypothetical self was making less money. In just about every way imaginable, the cost was prohibitive.
So what did you do if you were a kid saving money from a paper route in 1968 and you wanted to build a computer? Maybe you turned to How to Build a Working Digital Computer a book published in 1968 by [Edward Alcosser], [James Phillips], and [Allen Wolk]. This book did as the title promised: you could build a working digital computer. The components, though, were paper clips, tin cans, thread spools, and other household items. The only real electronic components you had to use were light bulbs and a battery, although you might also use store-bought switches in some places instead of the homemade versions shown in the book.
Continue reading “DIY Computer — 1968 Style”
If you find yourself in the vicinity of Mountain View, California you really should stop by the Computer History Museum. Even if you aren’t into the retrocomputer scene, there’s so much cool hardware ranging from a replica of the Babbage engine to nearly modern PCs. There’s even a room dedicated to classic video games. There are two fully working old computers at the museum that have their own special rooms: a PDP-1 (complete with vector scope to run Space War) and an IBM 1401.
The IBM 1401 looks like big iron, but in its day it was a low-end machine (costing an innovative business about $2500 a month). The base unit had 4000 words of magnetic core memory, but if you had a hankering for more memory, you could add the 350 pound dishwasher-sized IBM 1406 (for only $1575 a month or you could buy for $55100). How much memory did you get for $18900 a year? An extra 12000 words!
The problem is, the museum’s 1406 had developed a problem. Some addresses ending in 2, 4 or 6 failed and they were all in the same 4K block. [Ken Shirriff] was asked to go in and try to find the problem. We don’t want to give away the story, but [Ken] wrote up his experience (with lots of pictures).
Continue reading “Repairing $55,000 of Vintage Core Memory”
Electronics leak waves and if you know what you’re doing you can steal people’s data using this phenomenon. How thick is your tinfoil hat? And you sure it’s thick enough? Well, it turns out that there’s a (secret) government standard for all of this: TEMPEST. Yes, all-caps. No, it’s not an acronym. It’s a secret codename, and codenames are more fun WHEN SHOUTED OUT LOUD!
The TEMPEST idea in a nutshell is that electronic devices leak electromagnetic waves when they do things like switch bits from ones to zeros or move electron beams around to make images on CRT screens. If an adversary can remotely listen in to these unintentional broadcasts, they can potentially figure out what’s going on inside your computer. Read on and find out about the history of TEMPEST, modern research, and finally how you can try it out yourself at home!
Continue reading “TEMPEST: a Tin Foil Hat for Your Electronics and Their Secrets”
There are so many hacks in this project it’s hard to know where to start. So let’s start at the SailPi tablet which is a Raspberry Pi running the Sailfish OS on an LCD touch screen powered by a cell phone battery pack. The design looks more like a high-tech sandwich with the Pi in the middle than a tablet. Despite the appearance it works, at that’s what counts. The creator, [Aleksi Suomalainen] expended a lot of effort pulling all the pieces together on this project.
The Sailfish OS project is targeted at creating a new OS for mobile devices, especially cell phones. It is open source which invites developers to contribute to the project. The touch screen user interface is designed for ease of use by gestures from one finger on the hand holding the phone.
[Aleksi] ported Sailfish to a Pi 2 during a hacking week. He’s shared the code for it on his blog. During the hack week he played with accessing the GPIO on the Pi to flash an LED. To get you up and running quickly he provided an image you can load onto an SD.
It appears the Pi is finding a niche for OS hackers in addition to the hardware hackers using the GPIO.
Don’t miss the demo after the break to see the OS running on the Pi. Continue reading “Raspberry Pi Tablet Based on Sailfish OS”