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Nicholas Orlowsky 2024-04-07 23:39:15 -05:00
parent fdd6553f11
commit f2c0935b60
Signed by: nickorlow
GPG key ID: 838827D8C4611687
128 changed files with 39530 additions and 530 deletions
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163
chip8.sv
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@ -1,143 +1,38 @@
module chip8 (
input wire clk_in,
input wire rst_in
input wire fpga_clk,
input wire rst_in,
output logic lcd_clk,
output logic lcd_data,
output logic [5:0] led
);
bit [7:0] vram[0:1023];
bit [7:0] memory[0:4095];
bit keyboard[15:0];
bit [7:0] sound_timer;
bit [15:0] program_counter;
logic [7:0] rd_memory_data;
logic [11:0] rd_memory_address;
logic [11:0] wr_memory_address;
logic [7:0] wr_memory_data;
logic wr_go;
memory #(4096) mem (
fpga_clk,
wr_go,
wr_memory_address,
wr_memory_data,
rd_memory_address,
rd_memory_data
);
int cycle_counter;
bit rom_ready;
bit font_ready;
bit system_ready;
bit halt;
bit [7:0] random_number;
and(system_ready, rom_ready, font_ready);
beeper beeper (sound_timer);
cpu cpu (
system_ready,
memory,
clk_in,
keyboard,
random_number,
fpga_clk,
rd_memory_data,
cycle_counter,
program_counter,
vram,
sound_timer
rd_memory_address,
wr_memory_address,
wr_memory_data,
wr_go,
lcd_clk,
lcd_data,
led
);
gpu gpu (vram);
keyboard kb (
clk_in,
keyboard
);
rng randy (
clk_in,
program_counter,
keyboard,
cycle_counter,
random_number
);
rom_loader loader (clk_in, rst_in, memory, rom_ready);
always_ff @(negedge clk_in) begin
if (~font_ready) begin
bit [7:0] fontset[79:0] = {
8'hF0,
8'h90,
8'h90,
8'h90,
8'hF0, // 0
8'h20,
8'h60,
8'h20,
8'h20,
8'h70, // 1
8'hF0,
8'h10,
8'hF0,
8'h80,
8'hF0, // 2
8'hF0,
8'h10,
8'hF0,
8'h10,
8'hF0, // 3
8'h90,
8'h90,
8'hF0,
8'h10,
8'h10, // 4
8'hF0,
8'h80,
8'hF0,
8'h10,
8'hF0, // 5
8'hF0,
8'h80,
8'hF0,
8'h90,
8'hF0, // 6
8'hF0,
8'h10,
8'h20,
8'h40,
8'h40, // 7
8'hF0,
8'h90,
8'hF0,
8'h90,
8'hF0, // 8
8'hF0,
8'h90,
8'hF0,
8'h10,
8'hF0, // 9
8'hF0,
8'h90,
8'hF0,
8'h90,
8'h90, // A
8'hE0,
8'h90,
8'hE0,
8'h90,
8'hE0, // B
8'hF0,
8'h80,
8'h80,
8'h80,
8'hF0, // C
8'hE0,
8'h90,
8'h90,
8'h90,
8'hE0, // D
8'hF0,
8'h80,
8'hF0,
8'h80,
8'hF0, // E
8'hF0,
8'h80,
8'hF0,
8'h80,
8'h80 // F
};
// Load fontset into memory
for (int i = 0; i < 80; i++) begin
memory[i] = fontset[79-i];
end
font_ready = 1;
end
end
endmodule