Final Project ECE 385

Our final project is a mostly complete NES emulator on the FPGA that can successfully run Donkey Kong, Super Mario Bros., and Xevious (more games using NROM may run, but were untested). It has a single virtual “controller” that is mapped to our PS/2 keyboard with WASD for movement, and F, G, V, and B for buttons B, A, select, and start respectively. The output is rendered to a VGA output, upscaled by 2x.

The high level components of our design were the 6502 CPU (processor), the PPU (Picture Processing Unit) (graphics processor), the VGA controller (which uses a double buffer), the mapper for the cartridge, and the PS/2 controller to NES virtual controller interface. Additionally, we only support mapper 0 (a.k.a. NROM) as each cartridge is an ASIC which can contain special hardware for sound (e.g. Castlevania III), rendering, math, etc. Mapper zero is the simplest mapper.

Our processor only supports the official 6502 instructions (many later games in the NES generation used unofficial instructions which were not intended for use, but they still had functionality). We used the PS/2 keyboard for input. The instructions are stored in SRAM.

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
.qsys_edit		.qsys_edit
final_project_soc		final_project_soc
ps2_driver		ps2_driver
src		src
.gitignore		.gitignore
Makefile		Makefile
README.md		README.md
VGA_controller.sv		VGA_controller.sv
alu_6502.sv		alu_6502.sv
bram.sv		bram.sv
bram_color.sv		bram_color.sv
clock_divider.sv		clock_divider.sv
compare_output.c		compare_output.c
controller_interface.sv		controller_interface.sv
controller_interface_ps2.sv		controller_interface_ps2.sv
donkey_kong_photo.jpg		donkey_kong_photo.jpg
final_project.qpf		final_project.qpf
final_project.qsf		final_project.qsf
final_project.sdc		final_project.sdc
final_project.srf		final_project.srf
final_project.sv		final_project.sv
final_project_assignment_defaults.qdf		final_project_assignment_defaults.qdf
final_project_soc.qsys		final_project_soc.qsys
final_project_soc.sopcinfo		final_project_soc.sopcinfo
full_adder.sv		full_adder.sv
hex_display_driver.sv		hex_display_driver.sv
incrementer_16_bit.sv		incrementer_16_bit.sv
inverter_9_bit.sv		inverter_9_bit.sv
memory_contents.sv		memory_contents.sv
memory_interface.sv		memory_interface.sv
nes_mapper_base.sv		nes_mapper_base.sv
nes_mapper_one.sv		nes_mapper_one.sv
nes_mapper_zero.sv		nes_mapper_zero.sv
nes_palette_to_rgb.sv		nes_palette_to_rgb.sv
nes_ppu.sv		nes_ppu.sv
nes_to_dat.c		nes_to_dat.c
nmi_handler.sv		nmi_handler.sv
oam_memory.sv		oam_memory.sv
ppu_shift_reg.sv		ppu_shift_reg.sv
ppu_to_vga.sv		ppu_to_vga.sv
processor_6502.sv		processor_6502.sv
qflow_exec.sh		qflow_exec.sh
qflow_vars.sh		qflow_vars.sh
ripple_adder_8.sv		ripple_adder_8.sv
shift_register.sv		shift_register.sv
status_calc.sv		status_calc.sv
test_memory.sv		test_memory.sv
testbench_alu.sv		testbench_alu.sv
testbench_clock_divider.sv		testbench_clock_divider.sv
testbench_mapper_one.sv		testbench_mapper_one.sv
testbench_processor.sv		testbench_processor.sv
testbench_processor_via_mapper.sv		testbench_processor_via_mapper.sv
testbench_processor_via_mapper_two.sv		testbench_processor_via_mapper_two.sv
testbench_top.sv		testbench_top.sv
top_fast_wrapper.sv		top_fast_wrapper.sv
verilator_test_wrapper.sv		verilator_test_wrapper.sv

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