The new 68060 100mhz work on amiga?

[DaNi]

The chip is this
http://e-www.motorola.com/files/shared/doc/pcn/945048375992collateral.html
and if used by atari for the moment and up to 100mhz!!! with full mmu and fpu (is MC version!)
Work change my old 060 chip with this model?

[Framiga]

Hi DaNi,

doesn't exists a 68060 100MHZ!

Atari uses those XC model @66mHZ (with the MOS11 mask set E41J), that "could be" overclocked to 100 MHZ.

I've seen some CSPPC, with the XC 060 too.. but hard to find in small stock.

Ciao

[Lemmink]

It wouldn`t help anyway, as Amiga Accelerators aren`t meant for this high busspeeds. Even if the CPU would manage the 100 MHz the rest of the board won`t even if it is only for the RAM that can`t keep up.
This Atari Accelerator is specifically designed for 100 MHz so you don`t have this Problem there.

[whabang]

Motorola does not produce 68060s at speeds over 66 MHz. There is a "light"-version at 75, but that doesn't have FPU or MMU. It is probanbly possible to OC both to 100+ MHz speeds, though.

[Karlos]

It's a pity later amiga accelerators didn't go for SDRAM :-(

It irks me to think the old arch nemesis Atari has the CT60 cards :-)

Oh well. Not that a 100MHz 060 is any competition for an A1 or Pegasos ;-)

[Orjan]

Nope... But a .1 GHz classic Amiga would be very cool...

[Karlos]

Well, I do have a .025GHz 68040. And a .24 GHz 603 :-)

[NightShade737]

It wouldn`t help anyway, as Amiga Accelerators aren`t meant for this high busspeeds. Even if the CPU would manage the 100 MHz the rest of the board won`t even if it is only for the RAM that can`t keep up.

What are you talking about? The bus-speed would be exactly the same as all the other 060s and the board and RAM wouldn't need to 'keep up' anyway as it is pure processor speed. It isn't like putting 30ns RAM in a board that only takes 70...

[bloodline]

NightShade737 wrote:

It wouldn`t help anyway, as Amiga Accelerators aren`t meant for this high busspeeds. Even if the CPU would manage the 100 MHz the rest of the board won`t even if it is only for the RAM that can`t keep up.

What are you talking about? The bus-speed would be exactly the same as all the other 060s and the board and RAM wouldn't need to 'keep up' anyway as it is pure processor speed. It isn't like putting 30ns RAM in a board that only takes 70...

The Processor gets it's frequency from the Front side bus. The Amiga CPU boards used the same clock for the CPU as they did for the RAM usually a 50MHz clock.

If you put a 100Mhz crystal in there, the CPU and RAM would then run at 100Mhz. The CPU might be able to cope with that frequency, but the ram will fail.

[Karlos]

@Nightshade737

The 060 does not use a multiplier (or rather it uses a multiplier of 1x).

It's not like PPC or x86 where the CPU speed can be mch higher than the bus.

So a 66MHz 060 has a 66MHz bus to the outside world (that includes the memory). Clock it to 100MHz and the bus is also 100MHz. The point is that existing accelerators aren't designed for these high speed signals. 60/70ns SIMM RAM simply won't operate reliably at 100MHz.

-edit-

Matt beat me to it :-D

[NightShade737]

So 25MHz 040s have the RAM running at 25MHz?

[bloodline]

Karlos wrote:
-edit-

Matt beat me to it :-D

Great minds... etc... ;-)

[bloodline]

NightShade737 wrote:
So 25MHz 040s have the RAM running at 25MHz?

the 25Mhz 040 has a 50Mhz cpu clock :-)

-Edit- The 25Mhz 040 has a 0.5 multiplier :-)

[NightShade737]

So what is to stop you from using a 2x multiplier on a 50MHz 060 board?

[bloodline]

NightShade737 wrote:
So what is to stop you from using a 2x multiplier on a 50MHz 060 board?

I don't know any 060's that had a multiplier in them and you can't rework the board electronics.