From 6cf87e5fd5c4ba54fb3d95c90d56e6a1f14d4966 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sat, 16 Jan 2016 14:39:05 -0600
Subject: [PATCH] update a README

---
 configs/arduino-mega2560/README.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/configs/arduino-mega2560/README.txt b/configs/arduino-mega2560/README.txt
index a6d203af64..25f339d7a7 100644
--- a/configs/arduino-mega2560/README.txt
+++ b/configs/arduino-mega2560/README.txt
@@ -81,3 +81,24 @@ Configurations
     This is a reduce NuttShell (NSH) configuration using apps/example/nsh.
     The serial console is provided on USART0 and can be accessed via
     an external RS-232 driver as described above under "Serial Console".
+
+    NOTES:
+
+    1. As of 2015-01-16, the default static memory usage is:
+
+       $ size nuttx.elf
+        text    data     bss     dec     hex filename
+       34348    2117     944   37409    9221 nuttx.elf
+
+       And dynamic, heap usage:
+
+       nsh> free
+                    total       used       free    largest
+       Mem:          4736       1768       2968       2968
+
+       There is plenty of FLASH space, so many additional NSH featurs
+       could be enabled.  There is, however, not a lot of free SRAM.
+
+       NOTE: There is partial support for the MEMX pointer in apps/nshlib.
+       If that support were completed then some reduction of the static
+       .data allocation could be achieved by enabling the MEMX pointer.