New ACA1233/55

[nicholas]

Well, that would be interesting, as the A3000 AFAIK requires MMU for the Zorro III bus to work.

As long as the FPGA is big enough is there any technical reason why an MMU couldn't be implemented at some point too?

[guest11527]

As long as the FPGA is big enough is there any technical reason why an MMU couldn't be implemented at some point too?

Sure, it could. It's just work. BTW, it's not really the FPGA or the Zorro-III bus that requires the MMU. Memory management is required for two reasons: First of all, the 68030 has a bug concerning its external "cache-inhibit" signal - or rather, due to design constraints it is impossible to honor the cache-inhibit line on write-accesses. Of course, there is no reason to mimic this bug on an FPGA design, but then again, it is really hard to avoid this problem without slowing down the bus access.


Second, proper cache management is a necessity in a system where you run DMA. The reasons for that are a bit technical, but roughly one has to ensure that data written to RAM due to a DMA-read access are not overwritten by stale data from the CPU cache. This problem also applies to FPGA implementations. As long as you only run PIO, you're fine, but DMA is creating headaches.

[guest11527]

359,94 euros for the 55 Mhz version ??

Aparently, the prices for after-sales products for the Amiga are growing, and he believes that he can sell new cards for this price. After all, Jens does not run a charity, but wants to make a living. Would I buy a 68030@55Mhz for this price? No, I wouldn't. But then again, I already have a 68060@50Mhz, so I'm not even a potential customer.

Remember : he have all the Apollo 1260/3060/4060 schematics who can save the Amiga Classics, but he prefere to push down our favorite machine with 020/030...

Major problem for the 68060 is really getting hold of the CPUs. What you get these days are mainly faked 68060s from dubious Chinese sellers where you do not really know what you're getting. It is a 68060 or a 68040? Is it a relabled EC version? Is it defective?

Yes, if you check the mot/freescale website for vendors, you'll still find some authorized dealers that claim to be able to sell authentic 68060 - for prices like 300$ per piece. And whether they can deliver is the next question. Just to give you an idea...

[Cosmos Amiga]

Major problem for the 68060 is really getting hold of the CPUs. What you get these days are mainly faked 68060s from dubious Chinese sellers where you do not really know what you're getting. It is a 68060 or a 68040? Is it a relabled EC version? Is it defective?

Yes, if you check the mot/freescale website for vendors, you'll still find some authorized dealers that claim to be able to sell authentic 68060 - for prices like 300$ per piece. And whether they can deliver is the next question. Just to give you an idea...

That's true for today...

When he purchased the Apollo schematics ? About ten years ago ?

Ten years ago, 060 are not so rare than today...

And when we discovered the rev 6 since about 6 years (2009), they were very cheap (about 25-35 euros with FPU & MMU and reach 105 Mhz on my Apollo 1260) and NOT rare...

[Djole]

I bet he has a stash of 060s laying around, if people are willing to pay 350e for 030 (with used CPU) imagine the price of a 060 card.... Current customers will "need" an upgrade in a few years.

He better hurry up tho or he might get bitten by a vampire

That's true for today...

When he purchased the Apollo schematics ? About ten years ago ?

Ten years ago, 060 are not so rare than today...

And when we discovered the rev 6 since about 6 years (2009), they were very cheap (about 25-35 euros with FPU & MMU and reach 105 Mhz on my Apollo 1260) and NOT rare...

[Oldsmobile_Mike]

He better hurry up tho or he might get bitten by a vampire

He better hurry up before his existing customer base dies off.  

[Cosmos Amiga]

He better hurry up before his existing customer base dies off.  

Since the end of Commodore, our "elite" have completely destroyed the original Amiga...

Hope they will find another toy to break now...