NCR RealPOS 70 - Write Data W;Shift (07 H, DIRECTION, ROW, BYTE1, BYTE2

Chapter 11: APA Customer Display Interface 11-9
Write Data w/Shift (07h, DIRECTION, ROW, BYTE1, BYTE2,... BYTE32)
Thiscommandshiftstheimagedata,selectedbytheROWbyteandthe
datacontrolbits,onecolumntotheleftorrightdependingonthe
DIRECTIONbyteandfillstheemptycolumninDDRAMwithnew
data.Datashiftedofftheendofeachrowislost.Bit0of
the
DIRECTIONbyteselectstheshiftdirection,0=left,1=right,bits7
through*2areignored.
EachbitoftheROWbyteselectswhetheragivenrowisshiftedornot,
1=rowisshifted,0=rownotshifted.ROWbytebit0representsthetop
row(XAR=0),bit1thenextrow
(XAR=1),...andbit7thebottomrow
(XAR=7).Thedatabytes,BYTE1,BYTE2,...BYTE32filltheempty
columnfromthetoprowtothebottomrowskippingnon‐shiftedrows,
startingwithPage0followedbyPages1,2,and3wheninthe
grayscalemode.
Onedatabyteisrequired
foreachrowshiftedwheninthe
monochromemode(G=0),4arerequiredforeachrowshiftedwhenin
thegrayscalemode(G=1).TheXAR,theYAR,andthedisplaycontrol
bitsarenotaffectedbythiscommand.
*‐Ifbit1oftheDIRECTIONbyteisset,themodule
willuseBYTE1as
thecharactercodeandBYTE2asthecharactercolumnnumberforthe
ʺnewʺdataforfillingtheemptycolumninDDRAM.