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1.1 root 1: .TH 450 1
2: .SH NAME
3: 450 \- handle special functions of the DASI 450 terminal
4: .SH SYNOPSIS
5: .B 450
6: .SH DESCRIPTION
7: .I 450\^
8: supports special functions of, and optimizes the use of, the
9: .SM DASI
10: 450
11: terminal,
12: or any terminal that is functionally identical,
13: such as the
14: .SM DIABLO
15: 1620 or
16: .SM XEROX
17: 1700.
18: It converts half-line forward, half-line reverse, and full-line reverse
19: motions to the correct vertical motions.
20: It also
21: attempts to draw Greek letters and other special symbols
22: in the same manner as
23: .IR 300 (1).
24: .I 450\^
25: can be used
26: to print equations neatly, in the sequence:
27: .PP
28: .RS
29: neqn\| file\| .\|.\|.\| \(bv\| nroff\| \(bv\| 450
30: .RE
31: .PP
32: .SM WARNING:
33: make sure that the
34: .SM PLOT
35: switch on your terminal is
36: .SM ON
37: before
38: .I 450\^
39: is used.
40: The
41: .SM SPACING
42: switch should be put in the desired position (either 10- or 12-pitch).
43: In either case, vertical spacing is 6 lines/inch,
44: unless dynamically changed to 8 lines per inch by an appropriate escape sequence.
45: .PP
46: .I 450\^
47: can be used with the
48: .IR nroff (1)
49: .B \-s
50: flag or
51: .B \&.rd
52: requests, when it is necessary to insert paper manually or change fonts
53: in the middle of a document.
54: Instead of hitting the
55: return
56: key in these cases,
57: you must use the
58: line-feed
59: key to
60: get any response.
61: .PP
62: In many (but not all) cases, the use of
63: .I 450\^
64: can be eliminated in favor of one of the following:
65: .PP
66: .RS
67: nroff\| \-T450\| files\| .\|.\|.
68: .RE
69: or
70: .RS
71: nroff\| \-T450\-12\| files\| .\|.\|.
72: .RE
73: .PP
74: The use of
75: .I 450\^
76: can thus often be avoided unless
77: special delays or options are required;
78: in a few cases, however, the additional movement optimization of
79: .I 450\^
80: may produce better-aligned output.
81: .PP
82: The
83: .IR neqn (1)
84: names of, and
85: resulting output for, the Greek and special characters supported
86: by
87: .I 450\^
88: are shown in
89: .IR greek (7).
90: .SH SEE ALSO
91: .IR 300 (1),
92: .IR eqn (1),
93: .IR graph (1G),
94: .IR mesg (1),
95: .IR stty (1),
96: .IR tabs (1),
97: .IR tbl (1),
98: .IR tplot (1G),
99: .IR troff (1),
100: .IR greek (7).
101: .SH BUGS
102: Some special characters cannot be correctly printed in column 1
103: because the print head cannot be moved to the left from there.
104: .br
105: If your output contains Greek and/or reverse line-feeds,
106: use a friction-feed platen instead of a forms tractor;
107: although good enough for drafts,
108: the latter has a tendency to slip when reversing direction,
109: distorting Greek characters and misaligning the first line of text after one or more
110: reverse line-feeds.
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