Question to the tech guys

[AeroMan]

Hi,

   I've been analysing the A1200 schematics and I came up with a little doubt.
   The FC signals from the 020 are connected to Gayle. Their function is to identify which memory space the processor is trying to access. The question is: Does anybody knows what they are used for in the Amiga ? I can't see a reason to use them

[AeroMan]

No one have a clue ?  :-?

[AeroMan]

Zac67 wrote:
I know that some Ramsey registers on the A3000 are only accessible while in supervisor mode - probably the same with Gayle here.

@CLS2086: the 020 has nothing to do with the amount of chipram.

@A6000: I'm not into 68k bus protocols any more, but that's very possible.

This sounds possible... in the schematics, it decodes only the two lower bits, so basically it can detect supervisor and user mode.

Coprocessor may also be a thing, since it has some signals on Gayle.

Thanks for the help to everybody. If someone confirm the answer, please post  :-)