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diff --git a/Doc/RomWBW System Guide.pdf b/Doc/RomWBW System Guide.pdf
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diff --git a/Doc/RomWBW User Guide.pdf b/Doc/RomWBW User Guide.pdf
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diff --git a/ReadMe.md b/ReadMe.md
index 8a3b37af..0af2d378 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -3,7 +3,7 @@
 **RomWBW ReadMe** \
 Version 3.5 \
 Wayne Warthen  ([wwarthen@gmail.com](mailto:wwarthen@gmail.com)) \
-28 Jul 2024
+31 Jul 2024
 
 # Overview
 
diff --git a/ReadMe.txt b/ReadMe.txt
index 8f9c3b0d..4b9c23de 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -1,6 +1,6 @@
 RomWBW ReadMe
 Wayne Warthen (wwarthen@gmail.com)
-28 Jul 2024
+31 Jul 2024
 
 
 
diff --git a/Source/Doc/SystemGuide.md b/Source/Doc/SystemGuide.md
index a1a68c0d..9c498866 100644
--- a/Source/Doc/SystemGuide.md
+++ b/Source/Doc/SystemGuide.md
@@ -2409,6 +2409,9 @@ a double-word binary value.  The frequency of the system timer in Hertz
 is returned in Frequency (C). The returned Status (A) is a standard HBIOS
 result code.
 
+The tick count is a 32 bit binary value.  It will rollover to zero
+if the maximum value for a 32 bit number is reached.
+
 Note that not all hardware configuration have a system timer.  You
 can determine if a timer exists by calling this function repeatedly
 to see if it is incrementing.