diff --git a/.gitignore b/.gitignore
index 3c8c0fe5c..d88f1f2da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -72,3 +72,4 @@ nbproject
 build/macosx/esptool-*-osx.zip
 
 build/macosx/dist/osx-xtensa-lx106-elf.tgz
+/hardware/esp8266com/esp8266/tools
diff --git a/cores/esp8266/debug.cpp b/cores/esp8266/debug.cpp
index 5e280122e..68d3a6b82 100644
--- a/cores/esp8266/debug.cpp
+++ b/cores/esp8266/debug.cpp
@@ -26,6 +26,7 @@ void ICACHE_RAM_ATTR hexdump(uint8_t *mem, uint32_t len, uint8_t cols) {
     for(uint32_t i = 0; i < len; i++) {
         if(i % cols == 0) {
             os_printf("\n[0x%08X] 0x%08X: ", mem, i);
+        	yield();
         }
         os_printf("%02X ", *mem);
         mem++;