Re: Possibility of open-sourcing GS/OS

[Eric Smith <eric@brouhaha.com>]

"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