COAET" • r

Vertical and Horizontal Motion Indexes
One of the most powerful features of the Diablo is your
ability to set the vertical and horizontal motion indexes; this
gives close and flexible control of the expansion or conden·
sation of the prin(, both vertically and horizontally. This is
excellent foi: gr~pn!cs, text, or whatever: Legal contracts
using a 15 pitch wheel, for example, may use a horiz1::mtal
motion index (HMI) of'abdut 15 per inch, while a large type
face such as Orator 90% may use 8 per i1:,tch. The VMI
should also be adjl..istec:I to in the sarrie manner to compensate
fort~ese differ~nces. ··
A po~erful feature is close 'cqntrol
of vertical and horizont;4l pitc~
These adjustments can easily be made from the Diablo
keyboard, or under software control (or the Apple keyboard).
With the Diablo keyboard, to adjust the HMI type
, C:trl-, and the code for the desired value. ('Ctrl
'-is called" US," and is ASCII 31 ). For example, to print at 15
pitch (15 characters per inch, horizontally), enter
, Ctrl ·, and Ctrl I. The Diablo will then type at
that setting.
The vertical adjustment is only slightly different; the aper·
ative control code is called "RS,'' with an ASCII value of 30.
We access it with 'Ctrl .'So, to compress the vertical to 8
lines"per inch from the normal 6, type , Ctrl =,
Ctrl G. Now type anything on the · Diablo keyboard and
watch how small the motion is, including line feeds.
To do the same thing from the Apple, we use the ASCII
codes in the print routines of our pr9grams. For example, in
Applesoft we can do the same thing we just did above, this
way:
10 PRINT CHR$(27) CHR$(31) CHR$(9)
20 PRINT CHR$(27) CHR$(30) CHR$(7)
The 27 is the ASCII code for , the 31 is the'"'-,
the 30 is is the" =."the 9 applies to 15 HMI, and the 7 applies
to 8 VMI. Make sure you ·put all three of the characters
required for a command on one line or the printer will not
accept the after a'carriage return.
Figure 2 is a list of the CHR$ values, the keyboard command,
the HMI, and the VMI. In addition, for the specialists
we have some additional modes that are controlled by the
ESCAPE functions: -
J;:SC 0 · set right margin ESC 1 · set horizontal tab ESC 2
-clear all tabs ESC 3 ·tum on graphics mode ESC 4 ·tum off
graphics mode ESC 5 ·print forward ESC 6 ·print backward
ESC 8 · clear individual tab ESC 9 · set left margin ESC A
,print in red (with proper ribbon) ESC B · print in black
(default) ESC D · negative half linefeed ESC U ·positive half
line feed ESC CTRL I (n) ·absolute horizontal tab ESC CTRL
J · negative line feed ESC CTRL K (n) ·.absolute vertical tab
ESC CTRL (n) · $et VMI ESC CTRL (n) · set HMI.
Cl!R$(n)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Diab1o Printer HMI/VMI Chart
Keyboard
Control
Ctrl 'l'
Ctrl 'A'
Ctrl 'B'
Ctrl 'C'
Ctrl 'D'
Ctrl 'E'
Ctrl 'F'
Ctrl 'G'
Ctrl 'H'
Ctrl 'I'
Ctrl 'J'
Ctrl 'K'
Ctrl 'L'
Ctrl 'M'
Ctrl 'N'
Ctrl 'O'
Ctrl 'P'
Ctrl 'Q'
Ctrl 'R'
Ctrl 'S'
Ctrl 'T'
Ctrl 'U'
Ctrl 'V'
Ctrl 'W!
Ctrl 'X'
Ctrl 'Y'
Ctrl 'Z'
ESC
Ctrl
Ctrl
Ctrl
Ctrl
SPACE
II
$
%
&
(
)
*
+
I
0
1
I
I
I I I
'=' ,_,
Vertical
Pitch
(lines/in)
48
24
16
12
9.6
8
7
6
5.3
4.8
4.4
4
3.7
3.4
3.2
3
2.8
2.7
2.5
2.4
2.3
2.2
2. 1
2
1. 9
1.85
1. 78
1. 71
1. 66
1. 6
1. 55
1.5
1.45
1.41
1. 37
1.33
1.30
1.26
1. 23
1.20
1. 17
1.14
1. 12
1:09
1.06
1.04
1. 02
1.00
(Prestige Elite, 12 Pitch)
Figure 2
Horiz.
Pitch
(cols/in)
120
60
40
30
24
20
17
15
13. 3
12
11
10
9.25
8.5
8
7. 5
7
6.7
6.3
6
5.75
5.5
5.25
5
4.75
4.6
4.44
4.3
4.14
4
3.87
3.75
3.64
3.53
3.45
3.33
3.24
3.16
3.08
3.00
2.93
2.86
2.79
2.73
2. 67
2.61
2.50
2.50
22 Apple Orchard