2nd Processor Poll

Test you knowledge of the 2nd Core 940T

  • The second core is a 2d accelerator

    Votes: 0 0.0%
  • The second core is a fully programmable ARM9 co-processor

    Votes: 0 0.0%

  • Total voters
    0

nubie

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I have to do something to clear up all the crap going around.

1. The second core is NOT a 2d accelerator

2. The 2d accelerator is a different hardware part of the chip

3. The second core can run code just like a standard processor.

4. The second core has no MMU and therefore Linux can't use it as a multiprocessor computer natively, programs must be specially written.

5. HH mode has no problem using both cores to the full potential of the system.
 
The Arm940T actually has some 2D instructions built in afaik, but I could be wrong there, none the less it's fully programable, so I voted for that. ATI's ImageOn, that is built in the Zodiac is a 2D Accellerator, however I am also not really sure if it can't be used as a simple CPU as well nor if it is comparable to the Arm9 Series...
 
Mr. Anderson posted on Dec 4 2005 at 12:25 PM said:
The Arm940T actually has some 2D instructions built in afaik, but I could be wrong there, none the less it's fully programable, so I voted for that. ATI's ImageOn, that is built in the Zodiac is a 2D Accellerator, however I am also not really sure if it can't be used as a simple CPU as well nor if it is comparable to the Arm9 Series...

From what I remember from reading the magic eye doco a long time ago, the 2nd core is coupled to the 2d accelerator, where the first one is not.

This has been repeated by others. And from what I understand, we can not use it for homebrew, until Magic Eye supplies more information.

This is the reason it was dubbed the video co-processor. It's even called this in the magic eye doco. This is the pupose of the 2nd core. But it does not stop people from using it diffrently, as it really is just the first core, with less cache.
 
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Oh there is documentation about the 940T allready, no need to wait for magiceye docs(I don't think they care about that anyway their solution is aimed mainly at video-handhelds not at gaming machines), coming from ARM themselfs. If you care to read dozens of Pages, here it is: *download*
 
I think gph announced the 940t as a video co-processor because they planned to use the 940t for some of sdls functions. I guess we will find out when they release a final version of the sdk
 
If you go to wikipedia and search for "GP2X" youll find all the specifications you desire.

product_mmsp2_04-5.gif
 
dioxide posted on Dec 4 2005 at 02:11 AM said:
If you go to wikipedia and search for "GP2X" youll find all the specifications you desire.

product_mmsp2_04-5.gif


Oh that's the Magic Eye board... very interesting, so it has various chipsets as well... I wonder if someone would be able to use them...
 
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Mr. Anderson posted on Dec 3 2005 at 09:13 PM said:
Oh that's the Magic Eye board... very interesting, so it has various chipsets as well... I wonder if someone would be able to use them...

It would seem rather silly to have a product that doesen't use them. How do you know they're not used?
 
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dioxide posted on Dec 4 2005 at 03:30 AM said:
Mr. Anderson posted on Dec 3 2005 at 09:13 PM said:
Oh that's the Magic Eye board... very interesting, so it has various chipsets as well... I wonder if someone would be able to use them...

It would seem rather silly to have a product that doesen't use them. How do you know they're not used?

Well, Usb 1.1 and host mode are not used. :rolleyes:

Trooper
 
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Would it be possible for the GP2X to recognize a USB device, such as a USB hard drive?

I have a MP3/Hard drive player from iAudio, its very compact and can store 20GB, it would be pretty cool if i could connect it to the GP2X.
 
icurafu posted on Dec 4 2005 at 11:33 AM said:
From what I remember from reading the magic eye doco a long time ago, the 2nd core is coupled to the 2d accelerator, where the first one is not.

This has been repeated by others. And from what I understand, we can not use it for homebrew, until Magic Eye supplies more information.

This is the reason it was dubbed the video co-processor. It's even called this in the magic eye doco. This is the pupose of the 2nd core. But it does not stop people from using it diffrently, as it really is just the first core, with less cache.
Have you seen Squidge's sample 940T code in one of the other threads about this same topic? It can and has been used by homebrew apps.

The 2D graphic accelerator is not linked to the 940T. The MP2520F datasheet chapter about the 2D graphic accelerator does not mention the 940T in any way.

Its role as a video co-processor is limited to decoding video data. To do this, it has no special instructions or anything like that. It gets given a packet of data by the 920T, then it decodes that using standard ARM code, and hands the decoded packet back to the 920T.
 
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dioxide posted on Dec 4 2005 at 01:33 PM said:
Would it be possible for the GP2X to recognize a USB device, such as a USB hard drive?

I have a MP3/Hard drive player from iAudio, its very compact and can store 20GB, it would be pretty cool if i could connect it to the GP2X.
No. Not at all. The USB chip used in the GP2X is a USB client only.
 
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dioxide posted on Dec 4 2005 at 12:30 PM said:
Mr. Anderson posted on Dec 3 2005 at 09:13 PM said:
Oh that's the Magic Eye board... very interesting, so it has various chipsets as well... I wonder if someone would be able to use them...

It would seem rather silly to have a product that doesen't use them. How do you know they're not used?
Things like the IDE port (IDE hard drive, CD-ROM drive), SPDIF (digital audio) and camera interface are not physically connected anywhere, so no they cannot be used.
 
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Thanks for acknowledging what I thought, seems that people on here won't just go to the MagicEyes website, open their eyes, and read the specs for themselves like I did when I pre-ordered in September.

Beware of AireTamStorm, he/she believes firmly that the 2d accelerator is actually the 940T.

thread on processor
 
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icurafu said:
From what I remember from reading the magic eye doco a long time ago, the 2nd core is coupled to the 2d accelerator, where the first one is not.
both cores have full acces to the 2d accerlator.
 
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Vimacs posted on Dec 4 2005 at 12:52 AM said:
both cores have full acces to the 2d accerlator.


? :huh:

No argument here, where did that come from?
 
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nubie posted on Dec 4 2005 at 06:58 PM said:
Vimacs posted on Dec 4 2005 at 12:52 AM said:
both cores have full acces to the 2d accerlator.


? :huh:

No argument here, where did that come from?

There was a lot going on about the 2nd core being the only one to access the 2D accelerator. It's good to clear it up. I'm reading the source example now...
 
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I gotcha, I didn't realize that was such a common misconception, I didn't even see how someone could assume that.

I guess I forget all the training I have in PC repair helps me a lot in grasping bus concepts. B)


So thanks for the inclusion. :D
 
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