Computers

Coputer topics

HP ENVY 17 fan repair

The HP Envy (stylized as HP ENVY) is a line of consumer-oriented high-end laptops, desktop computers and printers manufactured and sold by HP Inc. They started as a high-end version of the HP Pavilion line. I have had a HP ENCY 17 laptop for many years. It has worked well. But just some days ago

HP LaserJet 1200 printer repair

I started to have paper jamming problems on my old HP Laserjet 1200n printer. It is a printer model released in around 2001. The HP 1200 printer has both parallel and USB ports, the N version comes with Ethernet network adapter box that plugs to USB port. The native control language is PCL 5 and

CES 2023

The Consumer Electronics Show, or CES, is held every year in Las Vegas. The world’s biggest annual consumer technology show is ready and raring to welcome back thousands of exhibitors and media to Las Vegas in the first week of the year. CES 2023 will host around 2,400 exhibitors. CES is typically where many of

PostScript source code available

PostScript (PS) is a page description language in the electronic publishing and desktop publishing realm. It is a dynamically typed, concatenative programming language. It was created at Adobe Systems by John Warnock, Charles Geschke, Doug Brotz, Ed Taft and Bill Paxton from 1982 to 1984. PostScript is the precursor to PDF, and at the time

About leap seconds

Doing away with leap seconds has been up for debate since at least 2013, on grounds that they’re more trouble than they’re worth. Leap seconds have represented risks to important communications and computing systems. Time Lords decree an end to leap seconds before risky attempt to reverse time article tells that The Bureau International des

PC hardware vulnerabilities of summer 2022

There has been several BWAIN PC hardware vulnerabilities published this summer. BWAIN is a short name for a Bug With An Impressive Name. BWAIN is an accolade that we hand out when a new cybersecurity flaw not only turns out to be interesting and important, but also turns up with its own logo, domain name

Atari at 50

Atari At 50: The Story Of Our Lives https://hackaday.com/2022/06/27/atari-at-50-the-story-of-our-lives/ It’s been a year of anniversaries, what with the 40th birthday of both the Commodore 64 and the Sinclair ZX Spectrum. There has been 50 years since Nolan Bushnell and Ted Dabney incorporated Atari Inc, a name that will forever be synonymous with the development of

HDMI firewall

Any device sporting a chip and some form of communications protocol can be hacked – that’s almost as strong a law as those governing gravity. Besides audio and video data, there are a number of parallel protocols in HDMI that transmit more information than we’d expect. There is I2C configuration data, HDCP (High-bandwidth Digital Content

LUMI supercomputer

New European supercomputer is inaugurated in Finland. LUMI is the fastest and most energy-efficient supercomputer in Europe, ranked also the third fastest in the world. It will have an expected peak performance of 550 petaflops (550 million billion calculations per second) while being fully powered by renewable energy: LUMI uses natural cooling systems and its