Radio Shack TRS-80 - Chapter 16: Reading Data; DATA and READ Statements

Computer Graphics Operation Manual
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SETXY
Sets Coordinates
SETXY sets and holds both current and previous X- and
Y-coordinates. When a new coordinate is given, it is
designated as the "current coordinate" and the last
coordinate is designated as the "previous coordinate." If a
new coordinate is specified, the "previous coordinate" is
lost and the "current coordinate" becomes the "previous
coordinate."
Example
CALL SETXY(I~~,I~~)
~. Sample Program (see LINE)
SETXYR
Sets Relative Coordinates
SETXYR sets the current (~,y) coordinates relative to
the previously set (~,y) coordinates. For example, if
the "current" coordinates are (l~~,l~~), CALL SETXYR(I~,I~)
will set the "current" coordinates to (ll~,ll~); the
"previous" coordinates will then be (l~~,l~~).
Example
CALL SETXYR(3~,3~)
---------lIadlelllaell---------
-l~9-