I want to build a CPU or at least get going. I don't have a good graphics chip that I want to do graphics with so I may settle for an 128x128 LCD until I get my concept working. Here are the parts I have so far. I think I need an Eprom and I would be building this CPU from scratch using the below parts.

65c816

Color LCD 128x128 Nokia Knock-Off
sku: LCD-00569
http://www.sparkfun.com/commerce/produc ... cts_id=569

Fram from Mouser FM24C64-G
http://www.mouser.com/ProductDetail/Ram ... rsIsog38w=


Polymer Lithium Ion Batteries - 1000mAh
http://www.sparkfun.com/commerce/produc ... cts_id=339

Lithium Ion/Polymer USB Battery Charger IC - MAX1555
http://www.sparkfun.com/commerce/produc ... cts_id=674

PS2 Connector:
http://www.sparkfun.com/commerce/produc ... ts_id=8509

This may come later:
Breakout board for SD card(s) as I want two:

http://www.sparkfun.com/commerce/produc ... cts_id=204

What other components would be useful? Do I need a PIA and ACIA?

Have you looked into Darryl's SBC series? He has many good features you can look into ...

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"My biggest dream in life? Building black plywood Habitrails"

It is a very nice project.

Use as a springboard. My own pinball project started life as a similar setup to his SBC1, but it is veering off into wild directions so it will use a CPLD and sound system as well as drivers. Springboard and acknowledgement...

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"My biggest dream in life? Building black plywood Habitrails"

Yes, you will need some kind of I/O IC. The 6522 VIA is the prime candidate. The 6551 ACIA has commonly been used to do RS-232 with the 6502 family of processors. Although it's convenient to connect directly to the bus, and although I've used it myslef a lot, it's definitely not the ideal UART. For my next home-made computer, I plan to use the Maxim MAX3100, although I'll have to go through the 6522 to interface to it, since the MAX3100 has a synchronous serial interface (SPI, IIRC) and cannot be put directly on the bus.

Note that the FRAM linked to above cannot be connected directly to a processor's buses. You will need regular parallel RAM for that, SRAM being by far the easiest to implement.

Not sure what you'll be powering with the LiIon batteries. But since you'll be paying for batteries and a charger, a cheaper solution may be "supercaps" or "ultracaps". MultiFarad capacitors that they seem to be using for volatile memory backup. Just an idea. I've not used any yet, but they look interesting... Cap's have come a long way since the old days.

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65Org16:https://github.com/ElEctric-EyE/verilog-6502

I had looked at the MAX3100 for my POC contraption, but decided in favor of the SCC2962 DUART. The '816 bus interface proved to be trivial and once I figured out the STA $ABS,X hardware bug, trouble-free.

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x86?  We ain't got no x86.  We don't NEED no stinking x86!