根据提供的代码，我注意到在VirtualBoard模块中存在一些错误和未定义的信号。下面是对代码进行修正后的示例：
`default_nettype none
module RightShifter #(parameter N=4)
(
input logic Clk,
input logic Reset,
input logic iLoad,
input logic iEnable,
input logic iLeftIn,
input logic [N-1:0] iD,
output logic [N-1:0] oQ
);
always @(posedge Clk or posedge Reset)
if(Reset)
oQ <= 1;
else if(iLoad)
oQ <= iD[N-1:0];
else if(iEnable)
oQ <= {oQ[0], oQ[N-1:1]};
endmodule
module VirtualBoard (
input wire CLOCK, // 10 MHz Input Clock
input wire [19:0] PB, // 20 Push Buttons, logical 1 when pressed
input wire [35:0] S, // 36 Switches
output logic [35:0] L, // 36 LEDs, drive logical 1 to light up
output logic [7:0] SD7, // 8 common anode Seven-segment Display
output logic [7:0] SD6,
output logic [7:0] SD5,
output logic [7:0] SD4,
output logic [7:0] SD3,
output logic [7:0] SD2,
output logic [7:0] SD1,
output logic [7:0] SD0
);
/** The input ports are replaced with internal signals **/
wire reset = PB[19];
wire clk = PB[18];
wire [7:0] data = S[7:0];
wire load = S[8];
wire enable = S[9];
/************* The logic of this experiment *************/
logic [7:0] q;
localparam N = 8;
RightShifter #(N) R0(.Clk(clk), .Reset(reset), .iLoad(load), .iEnable(enable), .iD(data), .oQ(q));
always @(posedge clk or posedge reset)
if (load)
q <= data;
else if (reset)
q <= 1;
else
q <= {q[6:0], q[7]};
/****** Internal signal assignment to output ports *******/
assign L[35:0] = {32{1'b0}}, L[7:0] = q;
endmodule
这个修正后的代码将修复了输入端口iD(In)和其他一些错误。请注意，此处仅给出了修正示例，并没有对功能逻辑进行更改。你可以根据自己的需求进一步修改。
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