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A comment on Apple's follow-up to M1 chip goes into mass production for Mac. Parent comment

Re:Apple's follow-up to M1 chip goes into mass production fo... by mcphage on Tuesday April 27, 2021 @12:44PM (#26958355)
> The main reason the M1 doesn't have good IO is that it's a beefed up ipad CPU. This was the first generation where they were putting the chips in systems that can use IO

Could you explain what you mean by this? I don't think I understand.

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Re:Apple's follow-up to M1 chip goes into mass production fo... by hans-moleman on Tuesday April 27, 2021 @01:27PM (#26958915)
All of Apple’s prior ARM experience comes from iOS devices. They had no need to develop io capabilities for iPhones and iPads with a single port. Now they put the chips in computers but most likely haven’t fully yet developed extended io capabilities.
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Re:Apple's follow-up to M1 chip goes into mass production fo... by mcphage on Tuesday April 27, 2021 @01:46PM (#26959125)
Hmm, but wouldn't features like wifi, all the cameras, the touchscreen, Cellular data, NFC, touch ID, speakers, bluetooth, and so on all come in via IO as well? You're right that they only have one port, but they still connect to a lot of different components.
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Re:Apple's follow-up to M1 chip goes into mass production fo... by adgjlsfhk1 on Tuesday April 27, 2021 @02:28PM (#26959603)
The problem with this analogy is that NFC, touch ID, speakers, and bluetooth are all in the MB/s or less range. On the desktop side, you have to deal with 10gb/s ethernet and 50-100gb/s for ram. It's just a whole different ballgame.
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Re:Apple's follow-up to M1 chip goes into mass production fo... by mcphage on Tuesday April 27, 2021 @07:29PM (#26963410)
Ah, that makes sense. Do iPhones connect to their RAM differently? I know it’s physically different than desktop RAM (for obvious reasons), but I don’t really know enough about hardware to know how it connects.
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Re:Apple's follow-up to M1 chip goes into mass production fo... by dijit on Tuesday April 27, 2021 @02:16PM (#26959464)
Those usually connect over serial-esque busses, and they connect via a security chip. (Akin to the t2 chip but much lighter)

A far cry from the kind of tolerances and sustained high throughput of PCIe.

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