3.5. Flags Screen
Shows values of all 56 flags in one screen.
Figure 8. Flags Screen
3.6. LCD Screenshots
Hold [ SHIFT ] and press [ DISP ] to get a screenshot.
You will find a .bmp file named according to the current time and date in the /SCREENS folder of the
FAT drive.
3.7. OFF Images
The LCD display used in DM41X calculator behaves in similar way as e-ink displays and contents of
the LCD is visible for a long time after the calculator is turned OFF.
This feature is used to display images when the calculator is turned OFF.
Single hard-coded OFF image is present in calculator firmware and this image is displayed
whenever the calculator is turned OFF and FAT disk doesn’t contain any valid custom image or the
FAT disk is in error state.
Custom OFF images should be stored in /OFFIMG/ directory. All valid images are then cyclically
displayed one after each calculator OFF in the order how they appear in /OFFIMG/ directory.
OFF images require specific image format. It has to be .bmp file with dimensions 400 x 240 and 1 bit
depth.
Examples of OFF images can be found on "A collection of off-screen images" page.
3.8. RTC correction
Note that to apply RTC correction you have to know (measure and calculate) ppm drift of calculator
clock first.
Use following steps to apply clock frequency correction.
1. Calculate correction factor C which best matches required ppm correction P
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