A list of things I still need to figure out or accomplish:

• 4MHz clock generation: what do I need?
  • Also, can I run the components at closer to 5MHz without things frying?
• I need to make really, really sure I understand the factors involved in hooking up power to my components without it ending in a tragic, smoking ruin.
• Finding a power supply:
  • Can I use a 12V AC-to-DC converter, and derive the 5V I need for the components from that? This would provide both voltages I need...
• Can I combine multiple outputs onto one input without using an OR gate, and not have some electrical principle I don't understand muck up the whole works?
• I kind of want to add a write-enable register for the EEPROM, to enable reprogramming the BIOS from the computer itself. However, I'm not 100% sure this is a good idea. At any rate, if I do this, it will be after I've got everything else working.
• At some point, I want to put together something for the expansion port. Things I want to include:
  • Some form of battery-backed real-time clock, possibly with some battery-backed RAM as well.
  • If I'm feeling really extravagant and want to totally betray my commitment to simplicity, I might try for an SDHC reader to serve as mass storage...
  • Possibly 4KB of RAM or 4KB of ROM in the expansion area (not sure what I'd put in the ROM, but the RAM would basically just extend the common area out to a solid 20KB...)