diff --git a/configs/xtrs/README.txt b/configs/xtrs/README.txt
index f40e859fa28..5137d1674db 100644
--- a/configs/xtrs/README.txt
+++ b/configs/xtrs/README.txt
@@ -98,3 +98,29 @@ Then make the SDCC binaries
 and install SDCC:
 
   sudo make install
+
+SDCC Update
+^^^^^^^^^^^
+
+I have had some problems building sdcc-2.6.0 on my current UBUNTU
+release (9.10).  I had other problems building sdcc-2.9.0 on UBUNTU 9.10.
+I suspect that the newer gcc toolchains are causing problems for these
+older SDCC releases.
+
+A 20091106 snapshot did build with no major problems on UBUNTU 9.10, but
+has some compatibilty problems with the older SDCC compiler.  For one, you
+will need to change the Z80 assember name and options in the Make.defs
+files as follows:
+
+-AS			= as-z80
++AS			= sdasz80
+ 
+-	@$(AS) $(ASFLAGS) $2 $1
++	$(AS) $(ASFLAGS) $1
+
+For another, I had other problems building with that 20091106 that look
+like compiler bugs.  If you are using UBUNTU 9.10, you may have to either
+(1) downgrade your GCC compiler to a version 3.x compiler and use one of
+the older stable releases, or (2) wait for the next stable SDCC release
+after 2.9.0.
+
diff --git a/configs/z80sim/README.txt b/configs/z80sim/README.txt
index 77972c2d4ec..cacca297464 100644
--- a/configs/z80sim/README.txt
+++ b/configs/z80sim/README.txt
@@ -73,3 +73,32 @@ Then make the SDCC binaries
 and install SDCC:
 
   sudo make install
+
+SDCC Update
+^^^^^^^^^^^
+
+I have had some problems building sdcc-2.6.0 on my current UBUNTU
+release (9.10).  I had other problems building sdcc-2.9.0 on UBUNTU 9.10.
+I suspect that the newer gcc toolchains are causing problems for these
+older SDCC releases.
+
+A 20091106 snapshot did build with no major problems on UBUNTU 9.10, but
+has some compatibilty problems with the older SDCC compiler.  For one, you
+will need to change the Z80 assember name and options in the Make.defs
+files as follows:
+
+-AS			= as-z80
++AS			= sdasz80
+ 
+-	@$(AS) $(ASFLAGS) $2 $1
++	$(AS) $(ASFLAGS) $1
+
+For another, I had other problems building with that 20091106 that look
+like compiler bugs.  If you are using UBUNTU 9.10, you may have to either
+(1) downgrade your GCC compiler to a version 3.x compiler and use one of
+the older stable releases, or (2) wait for the next stable SDCC release
+after 2.9.0.
+
+
+ 
+