Debug NSH on z80sim

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@474 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 28 insertions, 3 deletions

diff --git a/nuttx/configs/z80sim/README.txt b/nuttx/configs/z80sim/README.txt
index ff9754c04..4988dc34e 100644
--- a/nuttx/configs/z80sim/README.txt
+++ b/nuttx/configs/z80sim/README.txt
@@ -1,11 +1,36 @@
-pjrc-8051 README
-^^^^^^^^^^^^^^^^
+z80sim README
+^^^^^^^^^^^^^
 
-This port uses a primitive, simulated Z80 and the SDCC toolchain.
+This port uses a primitive, emulated Z80 and the SDCC toolchain.
+The instruction set emulator can be found in the NuttX CVS at
+http://nuttx.cvs.sourceforge.net/nuttx/misc/sims/z80sim
 
 The SDCC toolchain is available from http://sdcc.sourceforge.net/.  All
 testing has been performed using verison 2.6.0 of the SDDC toolchain.
 
+Configuring NuttX
+^^^^^^^^^^^^^^^^^
+
+  defconfig
+    The default configuration file, defconfig, performs a simple,
+    minimal OS test using examples/ostest.  This can be
+    configurated as follows:
+
+	cd tools
+	./configure.sh z80sim
+	cd -
+	. ./setenv.sh
+
+
+  nshconfig
+    This configuration file builds NSH (examples/nsh).
+
+    This alternative configurations can be selected by:
+
+	(Seleted the default configuration as show above)
+	cp config/z80sim/nshconfig .config
+
+
 Building the SDCC toolchain
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^