code cleanup and font fix

gpu.sv

@@ -0,0 +1,15 @@
+module gpu (
+    input wire [31:0] vram [0:2047]
+    );
+
+    import "DPI-C" function void init_screen();
+    import "DPI-C" function void draw_screen(logic [31:0] vram [0:2047]);
+
+    initial begin
+        init_screen();
+    end
+
+    always_comb begin
+       draw_screen(vram); 
+    end
+endmodule