diff --git a/Doc/ChangeLog.txt b/Doc/ChangeLog.txt
index 2014093a..b10f4955 100644
--- a/Doc/ChangeLog.txt
+++ b/Doc/ChangeLog.txt
@@ -18,6 +18,7 @@ Version 2.9.2
 - WBW: Support disk I/O to any memory bank
 - WBW: Fix floppy I/O error on slow CPUs w/ ints active (credit Jorge Rodrigues)
 - WBW: Support for KIO chip (based on board by Tom Szolyga)
+- N?B: Made ZCAL Y2K compliant
 
 Version 2.9.1
 -------------
diff --git a/Source/Images/fd1/u0/ZCAL.COM b/Source/Images/fd1/u0/ZCAL.COM
index a5add241..f239e952 100644
Binary files a/Source/Images/fd1/u0/ZCAL.COM and b/Source/Images/fd1/u0/ZCAL.COM differ
diff --git a/Source/Images/hd0/s1/u0/ZCAL.COM b/Source/Images/hd0/s1/u0/ZCAL.COM
index a5add241..f239e952 100644
Binary files a/Source/Images/hd0/s1/u0/ZCAL.COM and b/Source/Images/hd0/s1/u0/ZCAL.COM differ
diff --git a/Source/RomDsk/ROM_1024KB/ZCAL.COM b/Source/RomDsk/ROM_1024KB/ZCAL.COM
index a5add241..f239e952 100644
Binary files a/Source/RomDsk/ROM_1024KB/ZCAL.COM and b/Source/RomDsk/ROM_1024KB/ZCAL.COM differ
diff --git a/Source/RomDsk/ROM_512KB/ZCAL.COM b/Source/RomDsk/ROM_512KB/ZCAL.COM
index a5add241..f239e952 100644
Binary files a/Source/RomDsk/ROM_512KB/ZCAL.COM and b/Source/RomDsk/ROM_512KB/ZCAL.COM differ