Motorola 68060 FPGA replacement module (idea)

[Bobo68]

It might be easier to design a processor card, but then we'd be limited to A3000s and A4000.

and towerized A1200

[Bobo68]

DDR = Double Data Rate. So a 1333MHz stick is running at half.. 666.5Mhz. However as it's double data rate RAM it can transfer twice as much data on one I/O bus clock, than the actual IO frequency so in fact it works out at 1333MHz.

So to if I break it down. 1333MHz is the data transfer rate. The I/O clock is 666.5MHz.

and memory clock is 166 MHz

[Bobo68]

Could it be possible implement cpu and gpu to FPGA? Something like ... Cirrus Logic GD5446 or S3 Virge?

whether their design is opened?

[Bobo68]

So if those are too slow, then what about PCI?

PCI is faster than the Amiga bus both in clock and throughput and has the same bus width.  It should just be a matter of timing and translation.

We've recently seen the Prometheus PCI open sourced so there is a ZorroIII to PCI interface that works and only needs 1-2 CPLDs.  It could be even simpler since there aren't multiple PCI devices, it would be a target not a host and you wouldn't need to multiplex the address and data lines.

I've recently seen PLX PCI9054 which converts 060 to PCI bus and don't need CPLD/FPGA...

[Bobo68]

ermmm.. what? where?

on ebay

[Bobo68]

I'm really surprised nobody hooked one up to make a PCI backplane though.

why nobody?
http://www.powerphenix.com/ctpci/english/overview.htm

[Bobo68]

Ok, nobody on Amiga

you'll try

[Bobo68]

Ok, nobody on Amiga

because there is m diator on amiga

[Bobo68]

I'd rather get an SOC as the CPU, then you'd get a PCI bus and all other devices on the chip essentially for free.

Show me the  SOC with 68K code

[Bobo68]

Forgive me if this sounds terribly stupid, but surely an Arm chip (for instance) has data and address buses that we could connect to the trapdoor slot via some relatively simple FPGA glue logic, just as we would a 68060?

I think the logic won't be so simple as we want.
because 020 and 060 buses so close each other