66 lines
2.1 KiB
Systemverilog
66 lines
2.1 KiB
Systemverilog
module yayacemu (
|
|
input wire clk_in
|
|
);
|
|
wire [31:0] vram [0:2047];
|
|
bit [7:0] memory [0:4095];
|
|
wire [7:0] registers [0:15];
|
|
logic [3:0] stack_pointer;
|
|
wire [15:0] stack [0:15];
|
|
logic [7:0] delay_timer;
|
|
logic [7:0] sound_timer;
|
|
bit keyboard [15:0];
|
|
int cycle_counter;
|
|
bit halt;
|
|
int watch_key;
|
|
|
|
logic [15:0] index_reg;
|
|
bit [7:0] rand_num;
|
|
logic rom_ready;
|
|
logic [15:0] program_counter;
|
|
|
|
bit [7:0] fontset [79:0];
|
|
|
|
randomizer randy(clk_in, program_counter, keyboard, cycle_counter, rand_num);
|
|
keyboard kb(clk_in, keyboard);
|
|
rom_loader rl (memory, rom_ready);
|
|
cpu cpu (memory, clk_in, keyboard, rand_num, vram, stack, index_reg, stack_pointer, registers, delay_timer, sound_timer, cycle_counter, program_counter, halt, watch_key);
|
|
beeper beeper(sound_timer);
|
|
gpu gpu (vram);
|
|
|
|
int i;
|
|
initial begin
|
|
fontset = {
|
|
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
|
|
};
|
|
watch_key = 255;
|
|
halt = 0;
|
|
for(i = 0; i < 80; i++) begin
|
|
memory[i] = fontset[i];
|
|
end
|
|
for(i = 0; i < 15; i++) begin
|
|
keyboard[i] = 0;
|
|
end
|
|
sound_timer = 0;
|
|
delay_timer = 0;
|
|
cycle_counter = 0;
|
|
program_counter = 'h200;
|
|
stack_pointer = 4'b0000;
|
|
end
|
|
|
|
endmodule
|