[En-Nut-Discussion] Ethernut 2.0 Alpha Schematic

[Mikael E.Pedersen (MEP)]

> -----Original Message-----
> From: Austin Schutz [mailto:tex at off.org]
>
> 	Ok, so here's one more idea:
> 	1. Leave 0x0000 - 0x7fff for controller
> 	2. Make 0x8000 - 0xbfff for decoded devices using 3to8 or 4to16
decoder
> 	3. Make 0xc000 - 0xffff for bank switched memory (~ 16k blocks)

How about swapping 2 and 3 ? So the bank switched mem is before the decoded
devices.
In that case it will be possible to use the Mega128 feature that can set
additional waitstates for high memory addresses.
Then you can have extra waitstates on the decoded devices (if needed), but
still have faster access to both the
standard 32k ram and the bank switched ram.

Best regards,
Mikael