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Author Topic: Amiga Coldfire project dead?  (Read 31084 times)

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Offline Karlos

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Re: Amiga Coldfire project dead?
« Reply #89 from previous page: November 18, 2010, 01:41:01 PM »
Quote from: bloodline;592768
Put more simply, had commodore realeased both the A1200 and the falcon (running AmigaOS of course, possibly with a cost option for ECS compatibility)... I would have opted for the Falcon... How about you?

Well, I nearly bought a Falcon instead of my first accelerator card, so I guess I was always a bit on the fence. I'd have absolutely no qualms with an AROS based Falcon / CT060 :D

All things being equal, if we're talking ideals here, I would have preferred an A1200 with at least a SIMM slot on the motherboard, even if it only took a maximum 4MB (for PCMCIA friendliness) with the 020 clocked directly from the motherboard's 28MHz signal, rather than 14. Of course, that might actually have made it a bit faster than some of their big box 030/25MHz machines. It would have been nice if it had some chunky support, even if it was just hardware C2P and not a framebuffer.

Speaking of which, the Akiko's C2P was another massive let-down. Instead of writing 8 32-bit words of chunky data to it and reading it back as 8 32-bit words of planar data then pushing that to your Chip RAM, it should have had 8 address registers that you set up to point to your planes and then write to it and it writes the planar data to those addresses (incrementing as it goes). At worst, you'd need to reset the pointers once per scanline, or more likely once per frame. You might have some wait states whilst it's busy but a properly constructed loop could always find some other useful stuff to do whilst the hardware was converting/writing.
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Offline bloodline

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Re: Amiga Coldfire project dead?
« Reply #90 on: November 18, 2010, 01:59:29 PM »
It wasn't until very recently that (I think) Piru explained how Akiko worked to me... I was horrified... It is a total waste of time, clearly they had a bit of space left on the CD controller silicon and squeezed it in :(

I had thought it was (at least) more like a blotter that performed the bit translation on the fly...

Yeah, had the A1200 had fast ram as standard the CPU performance would have pissed on the Falcon base model... But we are dreaming again :(

Offline Piru

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Re: Amiga Coldfire project dead?
« Reply #91 on: November 18, 2010, 02:06:44 PM »
Quote from: Amiga_Nut;592762
If I meant Mac I would have said Mac, I meant PPC as in OS4 compatible or any embedded controller type setup people might want to make useable with OS4/AROS/MoS ie non-Apple Mac hardware.
You're right, there's no such hardware if you exclude Apple. But I wonder why you would do that?

Apple PowerPC hardware is still the best there is, and it has great support and repair services. Why go for some rare (tiny production runs), prohibitively expensive custom HW with substandard support when there are better options around?

Try to get support, spare parts and/or repairs for AmigaONE SE/XE or Micro-A1 today and you get the idea.
« Last Edit: November 18, 2010, 02:09:44 PM by Piru »
 

Offline Karlos

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Re: Amiga Coldfire project dead?
« Reply #92 on: November 18, 2010, 02:08:13 PM »
Quote from: bloodline;592777
But we are dreaming again :(


Considering we were just talking about the "AmigaOS running Falcon", I thought that was the point :)
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Offline AJCopland

Re: Amiga Coldfire project dead?
« Reply #93 on: November 18, 2010, 02:16:06 PM »
Quote from: bloodline;592777
It wasn't until very recently that (I think) Piru explained how Akiko worked to me... I was horrified... It is a total waste of time, clearly they had a bit of space left on the CD controller silicon and squeezed it in :(

I had thought it was (at least) more like a blotter that performed the bit translation on the fly...

Yeah, had the A1200 had fast ram as standard the CPU performance would have pissed on the Falcon base model... But we are dreaming again :(


@Piro/Bloodline
How does Akiko work? I take it you mean C2P conversion. I never bothered to find out before.

Andy
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Offline billt

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Re: Amiga Coldfire project dead?
« Reply #94 on: November 18, 2010, 02:22:26 PM »
Quote from: Amiga_Nut;592762
I meant PPC as in OS4 compatible or any embedded controller type setup people might want to make useable with OS4/AROS/MoS ie non-Apple Mac hardware.


PPC that is OS4 compatible only excludes Apple because someone says so. Why should it not be in the list? Because someone already said so? They're the only PPC laptops worth mentioning. (I'm not excited about that low-end CherryPal thing).

I think it's very disappointing that whoever decided Apple PPC won't be supported by OS4. Be it in an unchangabe contract or whatever that is now, I really wish it was not that way, as Apple PC is really the most sensible way to get an "Amiga" laptop at this point. Believe you me, making a new PPC laptop to satisfy those who make the rules is no easy task, I've been pondering that conundrum for 6 or 8 years and have nothing more than ideas to show for it, and I am an engineer.
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Offline bloodline

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Re: Amiga Coldfire project dead?
« Reply #95 on: November 18, 2010, 02:22:52 PM »
Quote from: AJCopland;592788
@Piro/Bloodline
How does Akiko work? I take it you mean C2P conversion. I never bothered to find out before.

Andy
Read Karlos's post :)

You write chunky pixel data, read back planar...

Offline Piru

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Re: Amiga Coldfire project dead?
« Reply #96 on: November 18, 2010, 02:28:29 PM »
Quote from: AJCopland;592788
@Piro/Bloodline
How does Akiko work? I take it you mean C2P conversion.

There's a single 32bit register. In order to convert 32 pixels you write 8 32-bit (4 byte) chunky pixels. Then reading back the 32bit register 8 times you get the planar data out. IIRC you get the least significant bits out first so that you can omit reading some planes if you use say 128 or 64 colours.
 

Offline Karlos

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Re: Amiga Coldfire project dead?
« Reply #97 on: November 18, 2010, 02:40:31 PM »
Quote from: Piru;592793
There's a single 32bit register. In order to convert 32 pixels you write 8 32-bit (4 byte) chunky pixels. Then reading back the 32bit register 8 times you get the planar data out. IIRC you get the least significant bits out first so that you can omit reading some planes if you use say 128 or 64 colours.

That's not quite how I remembered it (I thought there were actually 8 registers), but your recollection is probably better than mine. Either way, it was a write and read back mechanism that meant you still had to push the data back to the bitplanes yourself.
« Last Edit: November 18, 2010, 02:45:47 PM by Karlos »
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Offline Piru

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Re: Amiga Coldfire project dead?
« Reply #98 on: November 18, 2010, 02:47:33 PM »
Quote from: Karlos;592799
That's not quite how I remembered it (I thought there were actually 8 registers), but your recollection is probably better than mine. Either way, it was a write and read back mechanism that meant you still had to push the data back to the bitplanes yourself.
Well either way, it sucks the same :)
 

Offline Karlos

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Re: Amiga Coldfire project dead?
« Reply #99 on: November 18, 2010, 02:50:56 PM »
Quote from: Piru;592801
Well either way, it sucks the same :)


Amen to that, was such a waste. Just being able to write to the chip ram by itself would have made it so much more useful. After all, if you are doing software texture-mapped 3D type stuff, you are going to want to have your accumulation buffer in fast ram. You might just get away with reading that to a set of registers once per frame. However, the amount of shuffling you actually had to do with akiko rendered it all but pointless.
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Offline Franko

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Re: Amiga Coldfire project dead?
« Reply #100 on: November 18, 2010, 02:54:14 PM »
Holy crap... :eek:

Sorry for butting in here, but I'm totally amazed, I've got this old G5 up and running and it's wireless, I've even seen moving pictures on You Tube (not slide shows that I was getting on the G4) you can even scroll the window while a videos playing and Im sitting here in my kitchen on the internet...

Wow never knew you could do such things on a computer,  aren't these new fangled computers amazing... :)

Well Im off to see what other amazing things this can do... :)

Sorry, but I just had to tell someone... :D
 

Offline bloodline

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Re: Amiga Coldfire project dead?
« Reply #101 on: November 18, 2010, 03:12:48 PM »
Quote from: Franko;592806
Holy crap... :eek:



Well Im off to see what other amazing things this can do... :)

Sorry, but I just had to tell someone... :D


Just wait until you try an intel Mac... I guess you'll get one next boring Sunday :)

Offline Iggy

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Re: Amiga Coldfire project dead?
« Reply #102 on: November 18, 2010, 04:24:23 PM »
Quote from: Franko;592806
Holy crap... :eek:

Sorry for butting in here, but I'm totally amazed, I've got this old G5 up and running and it's wireless, I've even seen moving pictures on You Tube (not slide shows that I was getting on the G4) you can even scroll the window while a videos playing and Im sitting here in my kitchen on the internet...

Wow never knew you could do such things on a computer,  aren't these new fangled computers amazing... :)

Well Im off to see what other amazing things this can do... :)

Sorry, but I just had to tell someone... :D


Glad to hear that the G5 turned out to be a worthwhile purchase. It is amazing what a reasonably powerful computer can do, isn't it?
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Offline Tension

Re: Amiga Coldfire project dead?
« Reply #103 on: November 18, 2010, 04:27:36 PM »
Quote from: Iggy;592828
Glad to hear that the G5 turned out to be a worthwhile purchase. It is amazing what a reasonably powerful computer can do, isn't it?


What is amazing is that a 500Mhz PC from 6 years ago can run youtube fine, but a G4 mac mini chokes to death on youtube.

Fanbois of the world unite.

Offline Piru

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Re: Amiga Coldfire project dead?
« Reply #104 on: November 18, 2010, 04:47:42 PM »
Quote from: Tension;592830
What is amazing is that a 500Mhz PC from 6 years ago can run youtube fine, but a G4 mac mini chokes to death on youtube.

Well it's no secret that windoze flash is better accelerated.