eg(i) [ &lt;modifier&gt; ] &lt;integer&gt;</em>
</UL>

	There are ten integer and ten floating point registers - ireg(i) and xreg(i),
	i=0-9.  These registers can be used anywhere in a command  (even "set")
	as if they were numbers. They are initialized by using the command
	without modifiers; by using the modifiers "up", "down", "times" and
	"over" the registers can be modified at will.  For example:
          set xreg(2) 30000.   will set register 2 to 30000.0, and
          set xreg(2) up 100.  will incr