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Author Topic: HP-Prime DVT prototype test and pictures  (Read 20172 times)

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Offline Adriweb

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Re: HP-Prime DVT prototype test and pictures
« Reply #15 on: August 09, 2013, 04:11:33 am »
Why would I be ? :)

It'd be in fact simpler this way, since there is twice the RAM on the CX ;)
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Offline Lionel Debroux

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Re: HP-Prime DVT prototype test and pictures
« Reply #16 on: August 09, 2013, 04:20:54 am »
Lack of 2D acceleration on the Nspire, and the much slower processor, will suck for emulating the Prime, though.
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Offline Adriweb

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Re: HP-Prime DVT prototype test and pictures
« Reply #17 on: August 09, 2013, 04:55:10 am »
Yes...

But oh well, it's kind of the same struggle that with the GBA...
« Last Edit: August 09, 2013, 04:55:26 am by adriweb »
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Offline Streetwalrus

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Re: HP-Prime DVT prototype test and pictures
« Reply #18 on: August 09, 2013, 08:19:06 am »
Quote from: Lionel Debroux on August 09, 2013, 04:20:54 am
Lack of 2D acceleration on the Nspire, and the much slower processor, will suck for emulating the Prime, though.
The Prime has 2D acceleration ? O.O And yeah that's the cpu speed difference that I was worrying about.

Quote from: adriweb on August 09, 2013, 04:55:10 am
Yes...

But oh well, it's kind of the same struggle that with the GBA...
The Nspire CX's CPU is already 8 times faster than the GBA's (~128 MHz without Nover VS 16 MHz) and the RAM is plentiful so we have a lot of headroom to emulate the GBA. ;) With the Prime you are swapping roles. :P
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Offline Adriweb

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Re: HP-Prime DVT prototype test and pictures
« Reply #19 on: August 09, 2013, 08:25:03 am »
The GBA has a dedicated graphics controller which the CX doesn't, which is why there is frame skipping.

Prime emulation is possible - it will just be painfully slow, probably.
(Oh and BTW, the CPU in the prime might not be running at 400 MHz all the time, but at 266 MHz.)
« Last Edit: August 09, 2013, 08:25:28 am by adriweb »
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Offline Streetwalrus

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Re: HP-Prime DVT prototype test and pictures
« Reply #20 on: August 09, 2013, 08:49:20 am »
Quote from: adriweb on August 09, 2013, 08:25:03 am
The GBA has a dedicated graphics controller which the CX doesn't, which is why there is frame skipping.
Yeah that's what I meant. ;)

Also now that I've read the test I'd like to mention that on the HP40G you could hold Alpha/Shift like the modifiers (Ctrl/Alt/Shift/Win) on your computer keyboard. I hope this is still here because it was very handy. ;)
Also no surprise that Xcas is the CAS engine in there since Bernard Parisse (Xcas's lead developper) was the one who wrote the CAS on previous HP calcs. ;)
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Offline DJ Omnimaga

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Re: Re: HP-Prime DVT prototype test and pictures
« Reply #21 on: August 09, 2013, 08:49:26 am »
I hope that the Prime CPU won't constantly switch speed such as based on battery power, though x.x
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Offline Streetwalrus

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Re: HP-Prime DVT prototype test and pictures
« Reply #22 on: August 09, 2013, 08:57:12 am »
If HP engineers are smart enough (probably the case) then it'll run at 266 MHz all the time and 400 MHz will be accessible to native programmers.
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Offline DJ Omnimaga

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Re: Re: HP-Prime DVT prototype test and pictures
« Reply #23 on: August 09, 2013, 05:47:43 pm »
Yeah I just hope that if that's the case, that the current prototypes are also running at 266 MHz, else it woud suck if our programs ran slower on the final machine than critor's calc, giving us false hope. That said, 266 should still be fast enough.

What's the maintenance menu key btw? I knoe on the 39gII it was ON+F4, but on the prime there is no F keys.
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