Announcement

Collapse
No announcement yet.

PowerPC 40x Processor Support To Be Dropped From The Linux Kernel

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Eirikr1848
    replied
    I also have an old debugger / dev unit with a PPC 40x… something CPU, turned it on once and then it’s been behind things on shelves. I’d say that I would take it out to tinker and put through a final benchmark run… but I do not even know where to begin with getting a Linux variant onto this.

    Gentoo is an option, ArchLinuxPOWER is an option. So I guess… I’ll just let it lie until it’s time to mess with a BSD.

    EDIT: should have edited my post above instead of accidental post-bumping
    Last edited by Eirikr1848; 25 May 2024, 05:38 AM.

    Leave a comment:


  • Eirikr1848
    replied
    FYI NetBSD still supports PPC 405G.

    Just found a PCI IBM AIB with a PowerPC 405G in my collection and had to do some digging - sure enough - NetBSD 10.0 continues support for this and a lot of architectures, including Itanium!

    Leave a comment:


  • Developer12
    replied
    Originally posted by -MacNuke- View Post

    I am not talking about streaming services. I am talking about FreeTV OTA broadcasts.
    You yourself brought up the encrypted storage. It's still locked down to that device.

    VCRs and Linux OSs gave you total freedom.

    Leave a comment:


  • dragorth
    replied
    Originally posted by waxhead View Post

    It is but don't forget that clock cycles is not everything.. For example a 6510, 68000, PPC460, sx386 and a z80 for that matter would be vastly different if they all was running at 1Mhz for example (and of course the code would be different as well).
    Your correct, clock cycles aren't everything, but these devices all offer access to more memory, and the newer devices offer access to faster memory, things like PCI device access and more. It isn't just about the CPU, but I kept it to the CPU due to the subject of this post.

    Leave a comment:


  • waxhead
    replied
    Originally posted by dragorth View Post
    So, this isn't off topic, per say. Linux is still supporting those Amiga systems. It would be nice to be able to boot Linux directly on the PPC systems, rather than the m68K, because some of the PPC CPUs in the Open Source Project go up to 800Mhz, which is much faster than the stock 100Mhz max of the m68k.
    It is but don't forget that clock cycles is not everything.. For example a 6510, 68000, PPC460, sx386 and a z80 for that matter would be vastly different if they all was running at 1Mhz for example (and of course the code would be different as well).

    Leave a comment:


  • L_A_G
    replied
    Originally posted by commodore256 View Post
    I think NASA still uses PowerPC, they have to use hardware that's over 20 years old because low power and precision matters more in space. If your CPU is 75w in space, have fun dissipating that heat. They also need protection from cosmic rays and go with hardware rated to be space worthy.
    What you're referring to is the is the BAE RAD750, a radiation-hardened PowerPC 750, which is a few generations newer than what's being retired here. Apple called it the "G3" and used it across their late 90s model range in iMacs, iBooks, PowerBooks and PowerMacs. Nintendo also used it in the Gamecube, Wii and a heavily updated variant in the WiiU.

    I personally figured they'd have moved onto something slightly higher end with the complexity of sensors and the amount of data they produce, but apparently both the Perseverance Mars rover (launched in 2020) and the James Web Space Telescope (launched in 2021) still use them. I probably figured wrong and that most of the complex and heavier computational load from running those sensors is handled by DSPs closer to them. The fact that the Hubble Space Telescope originally ran on something so slow it got a 20x performance boost when it got upgraded to effectively a radiation hardened i486 should have made that obvious.

    Leave a comment:


  • jabl
    replied
    Originally posted by commodore256 View Post
    I think NASA still uses PowerPC, they have to use hardware that's over 20 years old because low power and precision matters more in space. If your CPU is 75w in space, have fun dissipating that heat. They also need protection from cosmic rays and go with hardware rated to be space worthy.
    That's the RAD750, a rad-hardened version of the PowerPC 750. It's 20 years old mainly because it's such a tiny market that all the NRE costs are amortized over a very small number of systems, so as long as it's workable it makes sense to avoid the enormous cost of developing a new platform. Per wiki list price for a RAD750 board is around $200k.

    A year or so(?) ago there was some announcement of a NASA program to make a rad-hardened RISC-V platform as the follow-on to RAD750. Not sure about the current status of that project.

    Leave a comment:


  • -MacNuke-
    replied
    Originally posted by Developer12 View Post
    Now anything can and will be yanked with the next software update, no matter how much you pay monthly.
    I am not talking about streaming services. I am talking about FreeTV OTA broadcasts.

    Leave a comment:


  • ribalda
    replied
    Aren't this the hard cores inside the Virtex 2 pro?

    It is a pity that we drop support for it

    Leave a comment:


  • commodore256
    replied
    I think NASA still uses PowerPC, they have to use hardware that's over 20 years old because low power and precision matters more in space. If your CPU is 75w in space, have fun dissipating that heat. They also need protection from cosmic rays and go with hardware rated to be space worthy.

    Though I think NASA is moving away from memory unsafe OSes. So I don't think Linux is space worthy for critical systems anymore. (fine for an Astronaut's laptop) Though I think there should be efforts in processing safe hardware. The damn branch predictors.

    Leave a comment:

Working...
X