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Author Topic: NatAmi 68070 design draft  (Read 25087 times)

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Offline Hans_

Re: NatAmi 68070 design draft
« on: June 24, 2008, 10:41:57 PM »
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Zac67 wrote:
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The Motorola 68060 CPU was designed that way. Its a CISC decoder in front of a RISC execution pipeline.

Err...

The '060 has no RISC core - this is garbage. RISC starts with Coldfire.

And I'd like a to see an available 5 GHz RISC CPU...



Err...

Wrong. The 68040 and 68060 convert CISC instructions to RISC for their internal core in a similar fashion to the way that the x86 does. Externally, it looks like a CISC processor. Coldfire has been called a "variable-length-risc"  processor because they made changes to the instruction set that put it more in-line with RISC architectures (i.e. they don't need the CISC to RISC conversion).

Hans
Join the Kea Campus - upgrade your skills; support my work; enjoy the Amiga corner.
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Offline Hans_

Re: NatAmi 68070 design draft
« Reply #1 on: June 25, 2008, 02:35:40 PM »
@all

Could I suggest that people be a bit more careful with unit prefixes? For example, 200-400 mHz would be 200-400 milli-Hertz, i.e., one cycle every 2.5 - 5 seconds. I am absolutely sure that the Natami team can beat that clock speed. I am also certain that you would not be happy with such performance.  :lol:

200-400 MHz (or mega-Hertz) on the other hand, would be orders of magnitude better.

Hans
Join the Kea Campus - upgrade your skills; support my work; enjoy the Amiga corner.
https://keasigmadelta.com/ - see more of my work
 

Offline Hans_

Re: NatAmi 68070 design draft
« Reply #2 on: June 28, 2008, 03:54:56 AM »
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RedskullDC wrote:
Hi Piru, et al.
Quote

Piru wrote:
http://www.amigahistory.co.uk/boxer.html


"It was only when the motherboard entered final prototype that the design was demonstrated."

Presumably they finished the HDL code used on the 2000 prototype model.
From the pics it appears the 2000 prototype used 3 small (by today's standards) Altera flex devices.

Does anyone know if the HDL code the BoXeR team wrote still exists, or who may have it/where it might be?
Perhaps they could be persuaded to release it?

Red


The BoXeR project just suddenly disappeared without a trace. We don't actually need their HDL code since NatAmi already has AGA support, etc.

Peronally I think that they're getting a little ahead of themselves with announcing a soft-CPU. Giving speed estimates is risky too, as it's very uncertain whether they will be able to reach it. Just don't expect to see this 68070 any time soon.

Hans
Join the Kea Campus - upgrade your skills; support my work; enjoy the Amiga corner.
https://keasigmadelta.com/ - see more of my work