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Author Topic: ADOOM on A600 running 22-35 FPS  (Read 55972 times)

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Offline Hattig

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Re: ADOOM on A600 running 22-35 FPS
« on: February 13, 2015, 11:03:39 PM »
Quote from: kolla;783552
Then CD32 is also not a 32bit console, and no m68k Amiga ever, for that matter.


Reading this thread, I remember why so many people have left Amiga.org, and also why many people give up on their personal Amiga hardware projects.

The A600 is a 32-bit computer (native register size) with 24-bit addressing (16MB), and a 16-bit ALU and data bus.

As this argument is all about addressing gigabytes of memory, then we have to take the addressing aspect. 24-bit. That's not 32-bit. End of story. You need to replace the main CPU in the A600 with one that has 32-bit addressing to get that capability.

And yes, this goes for the A1200 and CD32 as well, because they only have a 24-bit address bus on their CPUs. However the data bus is 32-bit, and the ALU is 32-bit, as well as the native 32-bit registers, so we can call the CD32 a 32-bit system, especially since it came out at a time when games consoles came with very little memory (the 2MB the CD32 was massive). Yet you could upgrade the CPU to get a full 32-bit address bus.

The A3000 or A4000 sed '030 and '040 CPUs with a 32-bit address bus from the beginning.

Anyway, the Vampire 600 is an amazing achievement (even with the old core, never mind the new core), and I think it is rude and unrealistic for people to expect it to have 2GB, and that because it doesn't it is somehow rubbish or sub-par.
 

Offline Hattig

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Re: ADOOM on A600 running 22-35 FPS
« Reply #1 on: February 13, 2015, 11:28:12 PM »
Haha.

Anyway, regardless of the New-ISA discussions, the main point is that there is something out there working today that works with the majority (all) the 68k Amiga code base, and does it very well, and that there is a new, generic board that should be even faster and expandable (and I'm sure we'll see a video of Quake on an A500 at some point).
 

Offline Hattig

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Re: ADOOM on A600 running 22-35 FPS
« Reply #2 on: February 14, 2015, 09:32:12 PM »
Quote from: ShK;783992
Here is the A600's main CPU replaced with the Vampire 600 Accelerator:

(Apollo mini) Phoenix Core BETA v.1996


Indeed, that's an A600 accelerator with it's own 32-bit address bus and 64MB local fast ram. I.e., not a stock A600 with a stock 68000 CPU. Anyway, enough of this.
 

Offline Hattig

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Re: ADOOM on A600 running 22-35 FPS
« Reply #3 on: February 16, 2015, 09:43:30 PM »
Even if a PS3 level performance was promised (I recall vaguely PS2 performance promises) it wouldn't have been with the Vampire 600 SoC, it would have been with the failed Natami board, which used a significantly larger FPGA and was to sell for hundreds of dollars/euros/pounds.
 

Offline Hattig

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Re: ADOOM on A600 running 22-35 FPS
« Reply #4 on: February 21, 2015, 10:10:13 PM »
Quote from: biggun;784977

Do we really need an ASIC?


Of course not, ASICs, even on an older process (90/65nm) are horrendously expensive for the potential market.

FPGAs are more than enough - a ~600Mhz 68020 equivalent is more than enough for any 68k Amiga software that's ever been written.

PowerPC? Well, some FPGAs include PowerPC cores that could potentially be wired in.