Custom chipset WIP updates.

diff --git a/custom.cpp b/custom.cpp
index 88b8ef5fc7fa4adfddb96295b2c2f16d337499cf..3da3a23552fa6045cf50502c0f00c86dddf5d435 100644 (file)
--- a/custom.cpp
+++ b/custom.cpp
@@ -1240,6 +1240,7 @@ static uae_u8 estimated_cycles_empty[256];
 static int estimate_cycles_empty_index = -1;
 static uae_u16 estimated_bplcon0, estimated_fm, estimated_plfstrt, estimated_plfstop;
 static uae_u8* estimated_cycles = estimated_cycles_empty;
+static bool estimated_empty;
 
 #if ESTIMATED_FETCH_MODE
 
@@ -1271,6 +1272,7 @@ static void end_estimate_last_fetch_cycle(int hpos)
                memset(estimated_cycles + start_pos, 0, hpos - start_pos);
        }
 #endif
+       estimated_empty = true;
 }
 
 static void estimate_last_fetch_cycle(int hpos)
@@ -1348,16 +1350,17 @@ static void estimate_last_fetch_cycle(int hpos)
                        }
                }
 #if OPTIMIZED_ESTIMATE
-               // zero rest of buffer
-               if (end_pos != start_pos2) {
-                       if (end_pos > start_pos2) {
-                               memset(estimated_cycles + end_pos, 0, maxhpos - end_pos);
-                               memset(estimated_cycles, 0, start_pos2);
-                       } else {
-                               memset(estimated_cycles + end_pos, 0, start_pos2 - end_pos);
+               if (estimated_empty && plfstrt == hpos && !ddf_stopping) {
+                       estimated_empty = false;
+                       // zero rest of buffer
+                       if (end_pos != start_pos2) {
+                               if (end_pos > start_pos2) {
+                                       memset(estimated_cycles + end_pos, 0, maxhpos - end_pos);
+                                       memset(estimated_cycles, 0, start_pos2);
+                               } else {
+                                       memset(estimated_cycles + end_pos, 0, start_pos2 - end_pos);
+                               }
                        }
-               }
-               if (plfstrt == hpos && !ddf_stopping) {
                        estimated_bplcon0 = bplcon0;
                        estimated_plfstrt = plfstrt;
                        estimated_plfstop = plfstop;