Woodstock Display Upgrade (a sight for sore eyes)

[markhen]

Bob - thank you,, I'm glad you enjoy :-) I will update all developments here on the forum.

Tangdfx - this module uses HCMS-3906 and HCMS-3916 which are more expensive (3.3V - 5V versions). What are prices on these parts in China? I can try to see if other HCMS could work, Vdisplay is nominally < 5V, but in practice I'm seeing close to 5V (in sample of 2).

Pauln - nice catch :-) The DP does indeed take a full digit. The code looks at the calculator display and decides if it has enough digits to display all digits, or not (for example, your "-1.2345678-25" case). If there is no minus sign on the mantissa, it will use the left-most digit to display a digit (this is something the base calculator never does (in "RUN" mode). In the event the display mode and display value exceed 12 digits, the least significant digit is dropped (truncated). This could easily be changed to round (vs. truncate).