[sdiy] My first big project

[David Brännvall]

first of all, sorry Paul for the private duplicate of this message, im just
so use to hit the reply button, that works in some other mailinglists.

> > The largest external memory size for AVRs is 64k right?
>
> Nativly addressable, yes..
>
> I've seen people using 1Mbyte of memory.
> You just need to use a 74hc138 and use ChipSelects...
> I can think of any 8 bit micros that have more than 64Kbyte of nativly
> addressable space.. infact MANY 8bit micros dont have built in support for
> external SRAM, you have to write your own 'peek()' and 'poke()' functions.

Mmm bankswitching ofcourse, you make everything sound so simple! This
74HC138 seems great, TTL level right? I should be able to handle that,
though I feel a bit lost in this wonderful new territory of hardware.

I could use this 74HC138 thingy to get lots of buttons on a few pins to!
Same thing for leds, with some extra d-latch or something, I think I will
work that out.

I think I got leds/buttons covered now.
DAs are available on the AVRs or PICs (this has the lowest proprity right
now).
Midi is simple serial communication.
I found a serial lcd display to, should be easy enough to drive with another
uart.
Bankswitching for the memory.

I guess I just haveto decide on wich processor/memory to use. Buy a dev kit.
and get busy.

And when I get stuck, kindly ask you nice people for help.

All of you, thanks.

regards,
David