New Raspberry Pi Model B+ • Hacker News Board

Re: New Raspberry Pi Model B+

#141

Post by jimmies » Wed, Mar 14, 2018, 2:22 PM UTC

m-p-3 wrote: post #133

jimmies wrote: post #16

PXE booting is sweet. I develop an OS (Crankshaft) for the Pi, and a lot of times it just has been waiting to write a new OS to the SD card, waiting, plugging it in, realizing I forgot to do something, so I had to repeat. Each time it was 15 minutes of waiting. Pulling the card out and putting it back in, especially with the ribbon cable on the way (and a case too) has been really painful. PXE boot is going to solve…

If they added a TRRS connector it would be quite easy to plug an external mic that way.

They have always had a TRRS connector, just that the extra R is used for the video signal sadly.

Re: New Raspberry Pi Model B+

#142

Post by bunderbunder » Wed, Mar 14, 2018, 2:26 PM UTC

vardump wrote: post #136

bunderbunder wrote: post #125

Earlier quoted context omitted.

I'm really pretty OK with it. The thing only has 1GB of RAM, so there's not a whole lot of value in having a >4GB address space. Might as well default to having the perf boost and reduction in memory consumption that comes with pointers that are half as big. People who actually have a use for 64bit on their pis will generally know what to do, and I'm guessing most of of them won't have a whole lot of use for the stre…

> so there's not a whole lot of value in having a >4GB address space. Don't most ARMv7 CPUs (like A7, A15, etc.) have 1 TB address space? On LPAE ARM, 64-bit arch will only get you larger virtual address space, but you get same 40-bit address space in both cases. > reduction in memory consumption that comes with pointers that are half as big Nothing prevents you from running 32-bit binaries on 64-bit OS, as long as y…

What use to I have for being able to address a hypothetical 1TB of memory on a computer that's got a fixed 1GB of memory soldered to the board?

I can see having a bit of headroom for virtual memory, but I wouldn't want to actually use it. The non-volatile storage on this computer is an SD card, so paging will be particularly expensive. Are you really going to have more than 3GB of swap? That's a pretty big appetite for thrashing.

Regarding running 32-bit binaries on 64-bit OS, sure, and the code that lives in those binaries will run faster. But you'll still be needlessly taking a hit on the 64-bit kernel and userland.

Re: New Raspberry Pi Model B+

#143

Post by linker3000 » Wed, Mar 14, 2018, 2:27 PM UTC

majewsky wrote: post #25

danellis wrote: post #10

> If you’ve been a Raspberry Pi watcher for a while now, you’ll have a bit of a feel for how we update our products. Model B... Model A... Model B+... When can we expect to see the Raspberry Pi Master and the Raspberry Pi Master Compact?

Raspberry Pi Pro Raspberry Pi Air Retina Raspberry Pi

iPi

Re: New Raspberry Pi Model B+

#144

Post by dwheeler » Wed, Mar 14, 2018, 2:29 PM UTC

This is a nice minor upgrade, good job. That said, I'd love to see a new model with more memory. That would require Broadcom (or some other organization) to develop a revised SoC that supported more control pins, but in a large sense that's a small change, and memory is cheap enough that adding some more memory wouldn't significantly change the price. But it would greatly extend what software the Pi can usefully run. Most software developers don't care very much about memory size, leading to bloat in size. As a result, the little memory limits what applications the current Raspberry Pi can use, including many programs useful for education. I wish them luck!

Re: New Raspberry Pi Model B+

#145

Post by digi_owl » Wed, Mar 14, 2018, 2:38 PM UTC

Reminds me that i have a 3B sitting around that i have yet to do anything with.

Re: New Raspberry Pi Model B+

#146

Post by digi_owl » Wed, Mar 14, 2018, 2:40 PM UTC

dwheeler wrote: post #144

This is a nice minor upgrade, good job. That said, I'd love to see a new model with more memory. That would require Broadcom (or some other organization) to develop a revised SoC that supported more control pins, but in a large sense that's a small change, and memory is cheap enough that adding some more memory wouldn't significantly change the price. But it would greatly extend what software the Pi can usefully run.…

Or perhaps some kind of storage connectivity beyond USB.

Re: New Raspberry Pi Model B+

#147

Post by l1k » Wed, Mar 14, 2018, 2:41 PM UTC

qalmakka wrote: post #17

"Just over two years ago, we released Raspberry Pi 3 Model B. This was our first 64-bit product" Very unfortunate that their in-house developed and promoted OS ("Raspbian") only supports armv7, thus leaving the vast majority that doesn't know about the existence of (or how to use) archlinux ARM an the likes with a 32 bit os. Am I the only one that doesn't get the sense out of this here? Debian supports Aarch64 out of…

It's worse, Raspbian is compiled for armv6 to also support the BCM2835 (Raspberry Pi 1). Here's a performance comparison between a modern 64-bit armv8 Linux on a Le Potato SBC versus armv6 Raspbian on the Raspberry Pi 3:

https://libre.computer/2017/12/03/performance-and-power-cons...

Re: New Raspberry Pi Model B+

#148

Post by sp0ck » Wed, Mar 14, 2018, 2:41 PM UTC

What I'm missing is on board flash. Even 512MB would be such useful for many usage scenarios to put OS there. SD cards are biggest source of problems on long run RPi's without some tweaking. There are almost none SBC with built in flash (BeagleBone is shiny exception).

Re: New Raspberry Pi Model B+

#149

Post by tjoff » Wed, Mar 14, 2018, 2:42 PM UTC

nikofeyn wrote: post #106

Narishma wrote: post #41

Why was the title changed? It's misleading right now since there's already a Raspberry Pi Model B+ available for ages. Should be "New Raspberry Pi 3 Model B+" just like on the blog post.

in general, i find the aggressive title changing on hacker news confusing. it’s been happening a lot recently where i can’t find a post by eye where i know i knew the title or where the title was changed away from the exact title of the linked post or article.

Indeed it is quite frustrating and I often wonder why someone would waste energy in updating titles for no apparent reason.

Re: New Raspberry Pi Model B+

#150

Post by cordite » Wed, Mar 14, 2018, 2:42 PM UTC

boris wrote: post #12

>We use a magjack that supports Power over Ethernet (PoE), and bring the relevant signals to a new 4-pin header. We will shortly launch a PoE HAT which can generate the 5V necessary to power the Raspberry Pi from the 48V PoE supply. This is nice though I personally wish they used the same Silvertel PoE module as Arduino which you just solder onto the board. Plus their PoE hat has a spinning fan.

The video mentioned support for PoE (with a HAT) as a feature. Why would they specifically point out an addon that doesn't come with the board as a feature of the board? PoE HATs already exist apparently, and are quite pricy. But I don't consider Arduino ethernet shields saying arduino comes with ethernet.