Explicit timeout

src/vme_data_bus.vhd

@@ -148,7 +148,7 @@ entity vme_data_bus is
 
     -- This is asserted when not IDLE.
     signal busy                 : out std_logic := '0';
-
+    
     -- Latched from last VME read operation.
     -- This is valid when int_data_strobe is high.
     signal int_data_o           : out vme_vec_64_t;
@@ -180,7 +180,8 @@ entity vme_data_bus is
 
 
     signal int_blt_decided      : in std_logic;
-    signal int_blt_continue     : in std_logic
+    signal int_blt_continue     : in std_logic;
+    signal int_timeout_n        : in std_logic;
 
     );
 end entity;
@@ -471,10 +472,14 @@ begin
           -- [30 ns]
           --
           -- Munk: Thus we can only catch BERR* here.
-          if (vme_berr_n_i = '0') then
+          if (vme_berr_n_i & int_timeout_n /= "11") then
             vme_ds_n_o <= "11";
-            vme_as_n_o <= '1';            
-            int_err_code <= c_ERR_BERR;
+            vme_as_n_o <= '1';
+            if (int_timeout_n = '0') then
+              int_err_code <= c_ERR_TIMEOUT;
+            else
+              int_err_code <= c_ERR_BERR;
+            end if;            
             busy <= '0';
             state <= IDLE;