NCR RealPOS 70 - Architecture; Display Data RAM

11-2 Chapter 11: APA Customer Display Interface
Architecture
Display Data RAM
Theon‐boardDisplayDataRAM(DDRAM)storesthepixel
informationusedfordisplayingimages.DDRAMisdividedintotwo
equalsections,Display0andDisplay1.Theimageineithersectioncan
bedisplayedand/orupdatedatanytimeusingtheDandHdisplay
controlbits.BothDDRAMsections
arefurtherdividedinto4equal
pages,Page0throughPage3.Thesepagesareusedtodisplay4‐level
grayscaleimages.
