adapting sidecar to CPU fast slot connector

[Cyberus]

The 86-pin connector on the side of the A500 is essentially the same as the A2000 CPU fast slot, except that pin 9(not connected on A500 bus) is a 28MHz line and pin 20 is not connected. So, in short, how would I go about adapting the A500 bus to take an A2000 CPU card?

Regards

[Cyberus]

Well, what I meant is, how do I go about getting the 28MHz to  the connector? It's just a case of taking it off the clock line on the motherboard and soldering a wire to pin 9 of the female connector on the mobo?
Or more importantly, a better question would be:
Is, and why is, the clock signal needed by an accelerator sitting in the CPU fast slot? Surely the accelerator generates its own clock signal?

[Cyberus]

Jope wrote:

Cyberus wrote:
Well, what I meant is, how do I go about getting the 28MHz to  the connector? It's just a case of taking it off the clock line on the motherboard and soldering a wire to pin 9 of the female connector on the mobo?
Or more importantly, a better question would be:
Is, and why is, the clock signal needed by an accelerator sitting in the CPU fast slot? Surely the accelerator generates its own clock signal?

Well, if you like, you can try it without the 28MHz signal, bu t otherwise you need to snipe it off the A500's mobo somewhere. Check the schematics. The Agnus has a 28MHz pin IIRC.

Yep, pin 34 of the Agnus is the 28MHz

[Cyberus]

Thanks! I had seen the adapter for the trumpcard before, but the DMA adapter would be perfect!

I will have to keep a look out for one. Things like this tend to appear on German ebay more than on UK ebay.

[Cyberus]

In fact, has anyone ever seen one? I mean, is it actually worth me looking :-?