[En-Nut-Discussion] Reserved Memory Allocations

[Harald Kipp]

Hi Grahame,

As a general rule for AVR based Ethernuts, use

0xD000-0xDFFF for fast devices
0xE000-0xEFFF for devices which require additional wait states

For Ethernut 3 the situation is completely different,
because the first 256 kByte are occupied by RAM and
we got 32 bit addresses with configurable chip selects.
But the expansion port address bus is connected to a
CPLD and would be able to drive existing hardware
for Ethernut 1/2.

Harald

At 16:44 27.07.2005 +1000, you wrote:
>Hi Harald.
>
>Given the Ethernut Series 3 is soon to be born, can you quickly update the
>Nut/OS Memory Considerations document, for those of us that wish to use
>memory mapped I/O devices, which hopefully will not interfere with Ethernut
>1,2, or 3 nor future development or any reserved memory banks you may have
>planned for.
>
>--
>Thanks. Grahame