Defending against page-cache attacks [LWN.net]

Defending against page-cache attacks

Posted Jan 28, 2019 7:55 UTC (Mon) by paulj (subscriber, #341)
In reply to: Defending against page-cache attacks by farnz
Parent article: Defending against page-cache attacks

Complete tangent from the story: That 16 KiB ZX81 RAM pack - it was wobbly, and just as you'd be getting into the end of (what felt like to a 9yo anyway) hours of typing in some programme, it'd wobble, the ZX81 would reset and everything would be gone! Oh that RAM pack, so frustrating! :)

Defending against page-cache attacks

Posted Jan 30, 2019 14:42 UTC (Wed) by nix (subscriber, #2304) [Link]

I had a wobbly RAM pack with an extra flaw: the PSU on my ZX81 was underspec so it didn't generate quite enough power to power the RAM and screen at once. The video signal generation was the first thing to go: you got waves of sync problems like a bad VHS video player working their way over the screen. But it didn't take long for eight-year-old me to figure out that the RAM wasn't holding its content either...

(Obviously I couldn't fix it. An eight year old with terrible coordination go messing in a power supply?! HELL NO.)