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+# Change Log Marlin bugfix-2.1.x fork for Ender 3 S1 Pro/Plus/noneProPlus
+This is a fork of a fork.
+
+The initial port of the Creality lcd_rts.cpp was made by Synman.
+
+After this i forked Synmans repository and created my own fork.
+
+All notable changes to this project will be documented in this file.
+
+I hope you like my work.
+
+## [MARLIN-S1FORK-BYTT-1] - 2023-03-31
+ 
+This release is called "M600 fix"
+
+I also reverted a critical linear advance commit. 
+2 of about 25 testers experiences printer halts on the skirt. 
+Reverting this commit fixed it for one of them.
+
+The second has yet to respond. As i could reproduce this i will push the revert as we did not have this problem before.
+ 
+### Added
+- [MARLIN-S1FORK-BYTT-add1] Changelog added
+
+### Changed
+- [MARLIN-S1FORK-BYTT-change1] Buffers reduced as they are not needed so high and sometimes lower buffers (faster reaction of the printer) are better.
+
+before:
+
+#define BLOCK_BUFFER_SIZE  64
+
+#define BUFSIZE 64
+
+#define TX_BUFFER_SIZE 128
+
+
+now:
+
+#define BLOCK_BUFFER_SIZE  16
+
+#define BUFSIZE 8
+
+#define TX_BUFFER_SIZE 128
+
+
+### Fixed
+- [MARLIN-S1FORK-BYTT-fix1] Reverted Linear Advance Marlin commit https://github.com/MarlinFirmware/Marlin/commit/ca77850cbb8ed57d4cdcf29a12a278d6bfa5c0d5
+- [MARLIN-S1FORK-BYTT-fix2] M600 filament runout fixed. You can now use M600 in your gcode.