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module setting_reg_masked
( input clock, input reset, input strobe, input wire [6:0] addr,
input wire [31:0] in, output reg [31:0] out, output reg changed);
/* upper 16 bits are mask, lower 16 bits are value
* Note that you get a 16 bit register, not a 32 bit one */
parameter my_addr = 0;
always @(posedge clock)
if(reset)
begin
out <= #1 32'd0;
changed <= #1 1'b0;
end
else
if(strobe & (my_addr==addr))
begin
out <= #1 (out & ~in[31:16]) | (in[15:0] & in[31:16] );
changed <= #1 1'b1;
end
else
changed <= #1 1'b0;
endmodule // setting_reg_masked
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