IBM 4400 Plotting the Data

268
Chapter 8P-Series Compatible Plot Mode (Odd/Even Dot Plotting)
Plotting the Data
P-SeriesPlot Mode plots the image from the horizontal bit pattern.Figure 34
duplicates the pattern shown in Figure 29 but is modified for Odd Dot Plot.
Eight dot rows are required, two characters per row, six columns per
character.
Figure 34. Odd Dot Plot Pattern Plan
The following program uses the Odd Dot Plot control code to produce the
image. The image is printed 25 times as shown in Figure 35. An entire dot row
is plotted in one printing pass. Consequently, the first row of all 25 im ages is
printed in one pass, followed by the second row, etc., until all rows have been
printed.
10 LPRINT *Odd Dot Plot*
20 FOR I=1 TO 8
30 READ R1
40 READ R2
50 LPRINT CHR$(5);
60 FOR N=1 TO 25
70 LPRINT CHR$(R1);CHR$(R2);
80 NEXT N
90 LPRINT
100 NEXT I
110 DATA 42, 64, 73, 65, 92, 64, 42, 64, 73, 65, 92,
64, 42, 64, 73, 65
120 LPRINT
Figure 35. Sample Odd Dot Plot
1
2
3
4
5
6
7
8
13 11579 13 11579
1st
CHARACTER
ODDCOLU MNS
2nd
CHARACTER
ODDCOLU MNS
1st
CHARACTER
ASCII DECIMAL
2nd
CHARACTER
ASCII DECIMAL
42
73
92
42
73
92
42
73
*
|
\
*
|
\
*
|
64
65
64
64
65
64
64
65
@
A
@
@
A
@
@
A
DOT
ROW