doc improved

README.md

@@ -1475,7 +1475,7 @@ GEM5=/path/to/gem5/
 Optionally, export environment variables in your **~/.bashrc** file or
 equivalent and open a new terminal:
 
-```
+```bash
 # In this example gem5 is located at $HOME/gem5 (that is your home folder).
 # Modify the variable to use the correct location.
 export GEM5=$HOME/gem5
@@ -1524,16 +1524,18 @@ cd gem5/utils/tlm/
 ../../build/ARM/gem5.opt conf/tlm_slave.py
 ```
 
-The message
+Ignore the message below.
 ```
 "fatal: Can't find port handler type 'tlm_slave'"
 ```
-is totally okay. The configuration file config.ini will be stored in the m5out/
-directory.  Copy this configuration file to the building directory of DRAMSys:
+
+The configuration file config.ini will be stored in the **m5out** directory.
+Copy this configuration file to the building directory of DRAMSys:
 
 ```
 dram.vp.system/build-DRAMSys-Desktop_Qt_5_7_0_clang_64bit-Debug/gem5
 ```
+
 Also the traffic generatior configuration file (conf/tgen.cfg) must be stored
 in a conf directory of this building directory.
 
@@ -1575,20 +1577,20 @@ Command template for generating **.ini** configuration files follows:
 
 ```bash
 build/ARM/gem5.opt configs/example/se.py \
-        -c <application> --mem-size=512MB --mem-channels=1 \
-	--caches --l2cache --mem-type=SimpleMemory \
-	--cpu-type=TimingSimpleCPU --num-cpu=1 \
-	--tlm-memory=transactor
+  -c <application> --mem-size=512MB --mem-channels=1 \
+  --caches --l2cache --mem-type=SimpleMemory \
+  --cpu-type=TimingSimpleCPU --num-cpu=1 \
+  --tlm-memory=transactor
 ```
 
 An overview of the architcture being simulated is presented below:
 
-![arch](DRAMSys/docs/images/gem5_se_mode_arch.svg)
+![arch](DRAMSys/docs/images/gem5_se_mode_arch.png)
 
-Note: this is a gem5 generated file, therefore DRAMSys is omitted. DRAMSys is
+**Note**: this is a gem5 generated file, therefore DRAMSys is omitted. DRAMSys is
 direct connected as external tlm slave.
 
-Note: workaround in se.py required:
+**Note**: workaround in se.py required:
 
 ```python
 ...