122$007ACOLINC noneA
The column increment or decrement value (plus or minus one). ROWINC and COLINC control the direction of the line drawing routine. The values represent the signs derived from the value in NEWROW (location 96/$60) minus the value in ROWCRS (location 84/$54) and the value in NEWCOL (locations 97,98/$61,$62) minus the value in COLCRS (locations 85,86/$55,$56).