This C module is a rewrite I recently did of an assembly module I did long ago. This C version has little testing and was needed for a PIC 18F452 project. The original assembly module was thoroughly tested and for a PIC 16F77 and 16F877. The assembly code was wrote for a Noritake 2 x 20 vacuum florescent display, then adjusted to work with a similar Seiko LCD display. Supporting the LCD required adding longer delays for the much slower device. The main functionality of this C module has been tested with the PIC 18F452 and both mentioned VFD and LCD displays.

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