Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
Trust the World's Fastest VPN with Your Internet Security & Freedom - A Lifetime Subscription of PureVPN at 88% off. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. ×

Comment Re:ECC (Score 1) 258

No boot ROM means that a hardware device constructed from discrete logic and analog chips directly demodulates digital data from the radio, addresses the memory, and writes the data. Once this process is completed, it de-asserts the RESET line of the CPU and the CPU starts executing from an address in memory. Really no ROM!

Comment Re: Windows (Score 1) 204

I recall recently, from ESR's stuff hackers used to know article:

That property is still useful, and thus in 2017 the AT convention has survived in some interesting places. AT commands have been found to perform control functions on 3G and 4G cellular modems used in smartphones. On one widely deployed variety, "AT+QLINUXCMD=" is a prefix that passes commands to an instance of Linux running in firmware on the chip itself (separately from whatever OS might be running visibly on the phone).

As well as in TVs (e.g. my Bravia), synth workstations, etc. Once you take an interest in how stuff works, it is astonishing how ubiquitous Linux has become. Some point to the 'dont make money in those areas' arguments, but forget history and the consequences when cheap commodity and consumer goods become good enough in an area which was previously the preserve of high end equipment.

Comment Re:@Intel: Why no ECC for consumer-grade processor (Score 1) 258

You hit a LSB and something is off by one. You hit a MSB and you're potentially off by trillions.

That's a good argument for Gray code.

I have to take issue with the assumption that nothing clears errors better than a hard reset. There are very many known strategies for dealing with errors on a running system, and a reset only clears persistent and cumulative error, rather than transient ones. Since we can assume that your computer doesn't keep the same data in memory all of the time, most will be transient.

Comment Re:ECC (Score 1) 258

The situation for AMSAT is still pretty bad, as far as I've heard. As a radio amateur group (and one that has launched quite a few satellites as space hitch-hikers) they can't afford the good stuff, but they get some donated by NASA and some of the commercial satellite companies. Only a few years ago they were still using the 1802 as their main vehicle controller, as that was their main choice in silicon-on-sapphire CPUs. They get some donations of space-qualified solar cells. They scrub their memory continuously, They use no boot ROMS. The program is loaded entirely by hardware, and then the CPU is started.

Slashdot Top Deals

You know you've landed gear-up when it takes full power to taxi.

Working...