HP-67 stuck in scientific (DSP 0) mode

[rprosperi]

(07-18-2020 09:36 PM)tribidouille Wrote:  -I read "Woodstock Series" here and there. What is it exactly?

The Woodstock Series includes the HP-21, 22, 25, 25C, 27, and 29C; they share common industrial design and internal electronics technology. More details can be found here. As the article shows, several other models, including the HP-67, share the same electronics design (though with several key changes, such as Card Reader, improved power supply, etc.)