diff --git a/fw/rtl/n64/n64_cfg.sv b/fw/rtl/n64/n64_cfg.sv
index aee93ce..1452f33 100644
--- a/fw/rtl/n64/n64_cfg.sv
+++ b/fw/rtl/n64/n64_cfg.sv
@@ -26,6 +26,9 @@ module n64_cfg (
                 9: bus.rdata = cfg.response[15:0];
                 10: bus.rdata = cfg.arg[0][31:16];
                 11: bus.rdata = cfg.arg[0][15:0];
+                // ...
+                14: bus.rdata = 16'h5343;
+                15: bus.rdata = 16'h7632;
                 default: bus.rdata = 16'd0;
             endcase
         end
diff --git a/sw/bootloader/src/main.c b/sw/bootloader/src/main.c
index 0e1aee4..26200c8 100644
--- a/sw/bootloader/src/main.c
+++ b/sw/bootloader/src/main.c
@@ -6,6 +6,8 @@ typedef struct sc64_cart_registers {
     __IO reg_t ARG[2];
     __IO reg_t RESPONSE;
     __IO reg_t BOOTSTRAP;
+    __IO reg_t ___unused;
+    __IO reg_t VERSION;
 } sc64_cfg_registers_t;
 
 #define SC64_CFG_BASE                       (0x1FFF0000)