| OSContrastDn | Function (ROM Call 0x297*)

system.h

void OSContrastDn (void);

Decreases the contrast.

OSContrastDn decreases the display contrast. It is actually a library function calling the real TIOS function called OSContrastDn, because the TIOS function destroys the content of a register which needs to be preserved.

Uses: AB_getGateArrayVersion

See also: OSContrastUp, OSContrastAddress, OSContrastValue