Full Boot From Bios

[crempp]

The goal of this PR it to get some BIOS to boot fully and without error. This will end up being a huge PR but it will keep the main dev branch clean while I work on it. It will also likely need refactoring when complete but we'll see what we have when we finish.

• [x] Implement 100% of instructions
• [x] Implement input/output
• [ ] Implement required components for boot
  • [ ] DMA8237
  • [ ] PIC8259
  • [x] PIT8253
  • [ ] PPI8255
  • [x] NMIMaskRegister
  • [ ] VideoMDA
• [ ] Implement interrupts.

Bonus points, implement non-required components

• [ ] Game port
• [ ] Expansion Unit
• [ ] Serial port 1 & 2
• [ ] Prototype card
• [ ] Fixed disk
• [ ] Parallel port 1
• [ ] SDLC bi-synchronous 2
• [ ] CGA
• [ ] Floppy disk