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@@ -139,6 +139,7 @@ https://www.pagetable.com/?p=410
 https://github.com/Klaus2m5/6502_65C02_functional_tests
 http://nparker.llx.com/a2/opcodes.html
 https://blog.scottlogic.com/2020/08/26/codegen-6502-webassembly.html
+http://www.righto.com/2012/12/the-6502-overflow-flag-explained.html
 
 testing:
 http://www.ucunit.org/_related__sites.html