david@ms.uky.edu (David Herron -- One of the vertebrae) (04/09/88)
wait
They don't need to abandon the Zorro II bus at all, AND they can also
have the 32 bit memory they'll need in order to run a 68030 properly.
What you do is borrow a technique from the uVaxII ... have a seperate
memory bus.
Disk controllers, ethernet cards, and most of the gadgets that you'd
want to have in your machine all will work fine on a 16 bit bus.
The only thing you really need a 32 bit bus for is full speed memory
access.
Am I missing something?
I suppose that the cards in the 16 bit bus will need to write to
memory eventually. Now, the uVaxII has 1 meg on its processor card
to handle this situation, the same could be done by providing some
memory for the 16 bit bus and fixing the OS to have devices write
to the 16 bit memory area.
Any other problems?
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