diff --git a/doc/README.dk1c20_std32 b/doc/README.dk1c20_std32
index 4822c6f..521fab7 100644
--- a/doc/README.dk1c20_std32
+++ b/doc/README.dk1c20_std32
@@ -91,10 +91,10 @@
   0x02000000 ---32-----------16|15------------0-
 	       |	       :	       | \
 	       |	       :	       | |
-  SDRAM	       |	       :	       |  > CFG_NIOS_CPU_SRAM_SIZE
+  SDRAM	       |	       :	       |  > CFG_NIOS_CPU_SDRAM_SIZE
 	       |	       :	       | |   = 0x01000000
 	       |	       :	       | /
-  0x01000000 ---32-----------16|15------------0-    CFG_NIOS_CPU_SRAM_BASE
+  0x01000000 ---32-----------16|15------------0-    CFG_NIOS_CPU_SDRAM_BASE
 	       |			       |
 	       :	      gap	       :
 	       :			       :
@@ -345,6 +345,7 @@
 	       |	       :	       | |
   0x00040000 --+- - - - - - - -:- - - - - - - -+-|- u-boot _start()
 	       |	       :	       | /
+  0x00000000   |- - - - - - - -:- - - - - - - -+- - u-boot environment
   0x00000000 ---8-------------4|3-------------0-