Lexmark T630n Technical Reference - Page 104
Delta Row
UPC - 734646532211
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2-92 PCL Delta Row Delta Row is a compression mode that identifies and transmits only those bytes different from the ones in a preceding row. The control byte consists of two parts: • High 3 bits: Number of bytes to replace +1 (1 to 8). • Low 5 bits: Offset from last unmodified byte (0-30); if the offset is 31, the next byte(s) is added to the offset until the next byte is not 255. Example: ESC*p300x1200Y ESC*b3M ESC*r1A ESC*b9W 'E0FFFFFFFFFFFFFFFF'x ESC*b9W 'E08000000000000001'x ESC*b0W ... ESC*b0W ESC*b9W 'E0FFFFFFFFFFFFFFFF'x ESC*rB |Move cursor to 1" x 4" |Set compression to Delta Row |Start raster graphics at current position |Num Offset |'111 00000'b=8 at 0: 'FFFFFFFFFFFFFFFF'x |8 at 0: '8000000000000001'x |No bytes change |No bytes change |8 at 0: '8FFFFFFFFFFFFFF'x |End graphics