A3000 - how to switch off CPU Slot

[AmireX]

Hello, I'am a happy owner of two A3000's. One running Amix and the other one running AOS 3.9. Now I've got an order of my wife to reduce the waste of space and to use only one of these machines (an good idea at all :-)). But now my problem: I have the Amix harddisk built in the AOS 3.9 machine, so that I can select from where to boot via bootmenu. But in the AOS 3.9 machine a Cyberstorm 060 accelerator is running and so Amix is not working on this machine. Now I'm looking for a little hardware modification (motherboard or Cyberstorm) so that I can switch off the Cyberstorm via external switch before booting Amix. Is there a possibility to cut special bus request signals from the CPU slot like /CBR or /BOSS ?? I tried to cut the power for the CPU slot, but there are too many lines :-? Hope anybody can help (so my wife is happy again and I'm too  :-D

[AmireX]

Cyberstorm Mk II 060 50 MHz. The "a" key seems not to work :-( Is there a Cyberstorm card which could turned off via keyboard during startup ??

[AmireX]

I'm very nervous too :-). But I have 2 backup motherboards, but no backup cyberstorm .. So better the motherboard burns then the cyberstorm ..

But seriously .. Amix with 030 and AOS 3.9 with 060 on the same machine would be great for me. This makes a lot of things easier, for example the data exchange between the OS's via A3070 tape drive (Now I plug the drive from one into the other).

On the other hand, a man needs a problem  :-D

[AmireX]

So I have the wrong cyberstorm version :-( A very nice solution without soldering iron :-)

[AmireX]

The CS power ? Is this a signal name on the CPU slot ?

[AmireX]

Do you know such a program ? Never heard about this way ..

In the book "AMIGA intern" the communication between zorro cards or CPU Slot and the mainboard cpu is described as follows.

First the coprocessor sends a /CBR (not /BR like other custom chips) to request the bus. Via buster chip this signal goes to the mainboard processor and this one answer with /BG. This /BG goes via buster to the coprocessor as /CBG and this one gives back the /BOSS signal (not /BGACK). Now the bus is fully controlled by the new processor. All the other DMA cards and chips can access the bus via /BR -> /BG -> /BGACK and work like ever.

So my idea to cut the /CBR signal. This signal goes to a special PAL chip (U701) on pin 19. I have made the cut there but without success :-( Another signal /CBREQ is sended direct from cpu slot to the buster. But I havent found any description ..

Last not least my Amiga still works and is stronger then ever after this little operations :-)

[AmireX]

Today I bought a Cyberstorm MkIII from Effy and I'll tell wether I can switch off it and then rebooting to Amix.

So I can put away my soldering iron :-)