Changed the solution for the PLOT problem with old -02 kernals to that used

for the VIC20: PLOT is not an kernal entry but a library function that will 
do the right stuff. This makes it work with other stuff that calls PLOT, too.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4249 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/c64/kplot.s

@@ -0,0 +1,21 @@
+;
+; Ullrich von Bassewitz, 2002-12-09, 2009-09-27
+;
+; PLOT replacement function for the C64. The kernal function in the -02 kernals
+; does not set the pointer to the color RAM correctly, so we need to fix that.
+;
+
+        .export         PLOT
+
+
+.proc   PLOT
+
+        bcs     @L1
+        jsr     $FFF0                   ; Set cursor position
+        jmp     $EA24                   ; Set pointer to color RAM
+
+@L1:    jmp     $FFF0                   ; Get cursor position
+
+.endproc
+
+