Sharp PC-1500A Instruction Manual page 123

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C.6.3. COLOR
The COLOR command allows the specification of the pen to
be
used for all subsequent printing
and drawing.
If
each pen position contaim a different color pen. then the COLOR command may
be used to change pen colors. The form of the COLOR command is:
COLOR expression
(either mode I
The expression must evaluate to an integer in the range 0 to 3. Each intege r corresponds to a
d iffcrcnt pen. The co lor represented by the integer will
vary
depending on the order in which the
pens were loaded in the carrier. The correspondence may be determined by the TEST command
(described abovel.
Numbers which are not integers but which are in the range 0 through 3 will be truncated to
integers . All other numbers will cause an ERROR 19.
When the PC·1500A Computer is turned OFF and then ON. again the pen which corresponds
to zero is selected.
In the TEXT mode. execution of the COLOR command will cause the pen position to
be
r.,set
to the left side of the paper. In the GRAPH mode, the pen wiln return to its previous position.
C.6.4. LF (Line Feed)
The LF command causes the paper in the printer to be moved forward or backwards. The form
of the command is:
LF expression
(TEXT mode only)
If
the expression evaluates to a positive number {up to 3276'7
I
the paper is advanced the number
of lines specified by the expression. An expression wh ich evaluates to a negative number will
cause the paper to be pulled back the n umber of lines specified by the expression. This is illustrated
by Figu re 2:
Figure 2: (minus direction)
- 2 ----------- --
-1 - ------ ------
0 ------------- < = pen position
+l ------------ -
+2 ----- ------- -
(plus direction)
The actual distance the paper is moved is related to the character size in effect when the L F
instruction is specified.
When the paper is traveling in the reverse di rection {i.e. it is being pulled back) an ioternal
counter prevents it from moving backwards more than 10.24 centimeters (about 4 inches).
NOTE: Do not attempt to in sert paper while the paper feed mechanism is operating. This can
damage the printer.
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