Nico8 CPU

An 8bit computer built in Logisim that features

• All of the basic things like registers, r/w to RAM, jumps, moving data, ALU operations, etc.
• Mulitple memory references per instruction
• 16bit register pairs for mathematical operations
• Interrupts
• IO ports
• Segmentation

Documentation here

How to Run

• Download and install Logisim Evolution
• Download all .circ files
• Load CPU.circ into logisim
• Click reset button (top left next to RAM)
• Example programs (load into PROGRAM RAM):
  • interrupt.bin loads r2 with the joystick when there is an interrupt
  • display_joy.bin Puts the joystick data on the display when there is an interrupt
• Enable clock ticks