This release includes updates to the bitmap graphics code to use separate operation constants with drawing operations, fixes to simple lock code that did not function properly when tasks of differing priorities attempted to claim them, a fix to fill, which was causing garbage on the stack if specified with a byte count of 0, and the addition of a "core lock" mechanism for ensuring control of a core without having to devote a hardware spinlock to the purpose.

Due to issues with uploading files, to download zeptoforth 0.61.0 go to https://github.com/tabemann/zeptoforth/releases/tag/v0.61.0.