diff --git a/hw/fpga/addr_decode.sv b/hw/fpga/addr_decode.sv
index c127697..bcfde85 100644
--- a/hw/fpga/addr_decode.sv
+++ b/hw/fpga/addr_decode.sv
@@ -18,7 +18,7 @@ assign hex_cs = addr >= 24'h007ff0 && addr < 24'h007ff4;
 assign uart_cs = addr >= 24'h007ff4 && addr < 24'h007ff6;
 assign board_io_cs = addr == 24'h007ff6;
 assign mm_cs2 = addr == 24'h007ff7;
-assign sd_cs = addr >= 24'h007ff8 && addr < 24'h007ffd;
+assign sd_cs = addr >= 24'h007ff8 && addr < 24'h007ffe;
 assign irq_cs  = addr == 24'h007fff;
 
 endmodule
diff --git a/hw/fpga/hvl/cs_testbench.sv b/hw/fpga/hvl/cs_testbench.sv
index 64dbe7f..3e69518 100644
--- a/hw/fpga/hvl/cs_testbench.sv
+++ b/hw/fpga/hvl/cs_testbench.sv
@@ -57,7 +57,7 @@ initial begin : TEST_VECTORS
             else
                 $error("Bad CS! addr=%4x should have mm_cs1!", addr);
         end
-        if (i >= 24'h007ff8 && i < 24'h007ffd) begin
+        if (i >= 24'h007ff8 && i < 24'h007ffe) begin
             assert(sd_cs == '1)
             else
             $error("Bad CS! addr=%4x should have sd_cs!", addr);