🚀 go-pugleaf

I know this is s fairly stupid question, but I am having a remarkable
amount of confusion over it...


I have a far * to a structure.  I need to share this with a device driver, by
writing the pointer to a location in memory.

the location in RAM that I have to write to is 2xsizeof(far *) or 8 bytes back
from a specific location in memory.

I know where I need to write the pointer, and what I need to write, but for
some strange reason I cannot get it to do what I want...

take:

void far *ptr = far pointer to a structure;

desiredDestinationPtr = (locationPtr - sizeof(void far *));

All I want to do is copy the 4 byte seg/offset pointer that ptr points to
into physical memory...  Aargh...  It shouldn't be this difficult...  
Too much coffee...  Please respond via email asap...

Thanks