A3000 - how to switch off CPU Slot

[Framiga]

Which Cyberstorm model?

Try to press the "a" key during the boot.

[Framiga]

Cyberstorm MKIII and CyberstormPPC as well even if, to be honest, i've never tryed it (A4000 here).

By the RomUpdate doc:

o Key "2" disables the processor on an 1200 ONLY.
  o Key "s" pressed during booting disables the SCSI,
            cdrive, bootmenu, bootmenu settings.
  o Key "c" pressed during booting disables 31khz bootmonitor
            and cvppc support
  o Key "m" pressed during booting disables the memory
  o Key "p" pressed during booting disables the pci
  o Key "a" pressed during booting disables all

[Framiga]

I'm sure, that there is someone here who could help you about the hardware route.

The MK2 works with the clock source in INT mode (as the built-in 030)

mhh . . .don't know . . . if it would enough to cutOFF the CS power, still the problem with all the signal addresses lines . . . don't know

[Framiga]

no, no CS as CyberStorm power lines.

but . . ."don't try this at home" :-)