Linked by Thom Holwerda on Tue 10th Sep 2013 18:25 UTC
Apple Apple's event is going on right now - and most of the new stuff already leaked weeks and months ahead of time. So, we're getting an iPhone 5S, an iPhone 5C, and iOS7 will be available later this month. I like the design of the 5C more than of the 5S; it's more playful, colourful - harking back to the coloured iMacs and PowerMac G3s. Too bad it doesn't come in red.

The fingerprint sensor in the 5S is interesting, but I wonder how accurate it will be in the real world; on top of that, with all the NSA news, I'm not particularly keen on Apple reading my fingerprint all the time. Supposedly, applications don't have access to it and it's not stored in the cloud, but I have little to no trust for companies.

The biggest news for me is the fact that the iPhone 5S has a new chip - the A7 - which has the honour of being the first 64bit chip inside a smartphone. iOS7 and first party Apple applications are all 64bit, and Xcode obviously supports it. While this obviously future-proofs the platform for more RAM, I wonder what other motives are involved here. ARM desktops and laptops, perhaps?

I doubt 64bit will provide much benefit today, but you have to hand it to Apple: at least they're done with the transition before it's even needed.

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Coprocessor
by Neolander on Tue 10th Sep 2013 18:41 UTC
Neolander
Member since:
2010-03-08

This idea of putting a low-power Mx ARM processor alongside an Ax "main" processor, so as to save battery in periods of low activity, sounds quite a bit familiar. Can't tell where I have seen it before though... Perhaps it was an ARM reference design or something like that.

Edited 2013-09-10 18:42 UTC

Reply Score: 3

RE: Coprocessor
by cpuobsessed on Tue 10th Sep 2013 18:54 in reply to "Coprocessor"
cpuobsessed Member since:
2009-06-09

Erm....Galaxy S4
Dual quad core running at different speeds (1.8 and 1.2Ghz I think)

Reply Parent Score: 6

RE: Coprocessor
by smashIt on Tue 10th Sep 2013 18:56 in reply to "Coprocessor"
smashIt Member since:
2005-07-06

sounds quite a bit familiar. Can't tell where I have seen it before though...


same here

it took me some time but then it dawned on me:
Nintendo DS!
ARM9 67 MHz and ARM7 33 MHz

Reply Parent Score: 5

RE[2]: Coprocessor
by zima on Tue 10th Sep 2013 19:05 in reply to "RE: Coprocessor"
zima Member since:
2005-07-06

Though DS has that ARM7 for entirely different kind of reason - compatibility with Game Boy Advance games.

Reply Parent Score: 4

RE: Coprocessor
by p13. on Tue 10th Sep 2013 20:30 in reply to "Coprocessor"
p13. Member since:
2005-07-10

Tegra 3 had four main cores and one low power core.

Reply Parent Score: 3

RE: Coprocessor
by viton on Tue 10th Sep 2013 22:13 in reply to "Coprocessor"
viton Member since:
2005-08-09

M7 is a different chip, not a just another core inside "main" chip. Every big enough chip like radio-module / wifi has its own dedicated processor.

Reply Parent Score: 4

RE[2]: Coprocessor
by tylerdurden on Wed 11th Sep 2013 00:19 in reply to "RE: Coprocessor"
tylerdurden Member since:
2009-03-17

If that is the case, then that means Apple's ASIC design team is really really behind the times.

Reply Parent Score: 1

RE: Coprocessor
by galvanash on Wed 11th Sep 2013 17:13 in reply to "Coprocessor"
galvanash Member since:
2006-01-25

This idea of putting a low-power Mx ARM processor alongside an Ax "main" processor, so as to save battery in periods of low activity, sounds quite a bit familiar. Can't tell where I have seen it before though... Perhaps it was an ARM reference design or something like that.


The M7 is not a low-power general purpose core - it is an ASIC that performs only a few specific functions. Similar to the 2 "extra" cores in the X8 on the Moto X (although on that device the ASIC is for different stuff, specifically for voice recognition in that example). In either case, the additional cores are processors, but they are not general purpose processors, and they are generally managed in completely difference power domains (they are kept on almost all the time).

Reply Parent Score: 2

RE[2]: Coprocessor
by Neolander on Wed 11th Sep 2013 20:27 in reply to "RE: Coprocessor"
Neolander Member since:
2010-03-08

"This idea of putting a low-power Mx ARM processor alongside an Ax "main" processor, so as to save battery in periods of low activity, sounds quite a bit familiar. Can't tell where I have seen it before though... Perhaps it was an ARM reference design or something like that."

The M7 is not a low-power general purpose core - it is an ASIC that performs only a few specific functions. Similar to the 2 "extra" cores in the X8 on the Moto X (although on that device the ASIC is for different stuff, specifically for voice recognition in that example). In either case, the additional cores are processors, but they are not general purpose processors, and they are generally managed in completely difference power domains (they are kept on almost all the time).

I see, thanks for the clarification ! I did think this was just a low-performance, power-efficient "extra core", as in Tegra 3, rather than special-purpose silicon.

Edited 2013-09-11 20:33 UTC

Reply Parent Score: 1