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Thread: kernel mode knowledge quest

                  
   
  1. #1
    DCEmu Newbie hibbity's Avatar
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    Default kernel mode knowledge quest

    can someone explain the major differences between user and kernel mode.

    does kernel mode have more memory or is it something else?
    it seems to be important looking in from the ignorant outside, but i want to understand why, and why only some kernel mode apps work on 2.0+. please explain.

  2. #2
    DCEmu Newbie jairolas's Avatar
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    use more ram, less ram. in other words More power, less power lol

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    DCEmu Old Pro SSaxdude's Avatar
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    Kernal mode has to do with Wifi and Infared also.

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    DCEmu Coder BrooksyX's Avatar
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    Kernal mode gives you full access to the psp's hardware. Without it coders wouldnt be able to use the gpu and wifi to their advantage when they make their applications. So without kernal everything has to be emulated in the cpu and ram. Thats why 2.0 and above applications dont run as well as those made for 1.5 and lower because 2.0 and above cannot use kernal.


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    soo.. basically the n64 emulator would run better if it was coded to use kernel mode..

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    DCEmu Newbie ZFB8's Avatar
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    Yes, and eventually he plans to use kernel mode, but as he has ALREADY stated, for what he's coding right now, there's no point in kernel mode, and he wants to keep it 2.0+ friendly for as long as possible.

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    No no no no no no no no no no.
    Not a single person here has it right.

    User mode gives restrictive access to special parts of the psp hardware (flash/prx loading/etc). Kernal mode gives unrestricted access. It does not unlock any power. A User & Kernal app would run at the same speed.

    Iris is using hw 3d and its in user mode. Monkey64 is still in user mode and rendering 3d.

    The reason why wifi needs kernal mode is to load and init prx (think of them as the psp version to a dll) files to access the wifi hardware.

  8. #8

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    But User mode does have wifi.........

  9. #9

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    AHA... GREAT NEWS!!!

    fanjita has created a new eloader for 2.01+ fw which can use wifi... so you wont need to use kernal!

    this rocks... PS: please dont use kernal mode!

  10. #10
    DCEmu Pro Cooe14's Avatar
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    Question

    Quote Originally Posted by PSmonkey
    No no no no no no no no no no.
    Not a single person here has it right.

    User mode gives restrictive access to special parts of the psp hardware (flash/prx loading/etc). Kernal mode gives unrestricted access. It does not unlock any power. A User & Kernal app would run at the same speed.

    Iris is using hw 3d and its in user mode. Monkey64 is still in user mode and rendering 3d.

    The reason why wifi needs kernal mode is to load and init prx (think of them as the psp version to a dll) files to access the wifi hardware.
    Than why do programs seem to run faster with kernel (1.50) than without (2.0+) ?

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