PX41CX extra characters on terminal connection

[agarza]

(08-31-2024 06:08 AM)krischik Wrote:  When DUMPin the calculator content I get all sorts of extra characters:

The PX-41CX shares the SPI (Display) and UART (Serial data) ports due to the limited number of pins on the AVR128DA.

The noise you’re seeing is actually the data being sent to the display.

When dumping the PX-41CX memory, an FF character is transmitted at the start, and an EOT character at the end of transmission.
This helps reduce noise, as CoolTerm allows you to set these characters as filters. In CoolTerm, configure FF (Clear on Form Feed) and EOT (Update the Display on End of Text) in the Data Handling section.

Hope I made sense.