I am going to start a project "AVR-based PC".
It should be based on 8515 + 32K external RAM, serial flash ( as a storage ). I think it will be 24c64 with an ability of upgrade ( since a new address is not require extra addr pins :) ). UART to connect it to the PC. And the simple keyboard, modeling the arrow pad of the pc-keyboard + enter key :). Also i am going to use LCD connecting it as an external memory ( time-diagrams on the datasheet give me a hope it will work :) so forget me if i change my plans of interracting with the LCD via rd, wr ;-) )
Now i have it all seperated as a parts and gathered as an idea :) The main aim is to build the cheap ( i am going to use just an old parts as a 100% poor hobbist :) ) book-reader, menu based notes reader, reminder. As an extension - model-independed avr-based portable pc.
So if anyone has any helpful ideas or remarks - i am ready to discuss those before i start.
Also everybody who wants to join the project (to build his own device) are welcome.