FORTH for the SHARP PC-E500 (S)

[Klaus Overhage]

Thank you for all the detailed information. Large files are slower with MBSharpNotepad, but editing and loading normal source texts, whether BASIC or Forth, is really easy with it. I tried the example on strings at the end of manual.md on two PC-E500s. Both times most of it worked only strlower and strupper not:

name type
John Doe
name strlower
Exception #-4
name type
John Doe
name strupper
Exception #-4
name type
éohn Doe

Exception #-4: "stack underflow"

Is Forth500 only generated from the assembler source code Forth500.s or are there other Forth source codes that are part of Forth500?