"Michael J. Mahon" <mjmahon@aol.com> writes:
So the bottom line is that, although building a RAM card for the IIgs
larger than 4MB is more complex, the 65816 _can_ directly address up
to 8MB of RAM. That could all be used by an operating system, if
needed.
I've inquired about this before, since 8 MB RAM cards for the GS have
been sold. Apparently using them requires some patches to the memory
manager. There's also a problem with DMA devices (e.g., Apple High Speed
SCSI card) because DMA from the bus is only possible to the first 4MB.
Eric