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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
;"tek41.scm", Tektronix 4100 series graphics support in Scheme.
;Copyright (C) 1992, 1994 Aubrey Jaffer
;
;Permission to copy this software, to modify it, to redistribute it,
;to distribute modified versions, and to use it for any purpose is
;granted, subject to the following restrictions and understandings.
;
;1. Any copy made of this software must include this copyright notice
;in full.
;
;2. I have made no warrantee or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
;3. In conjunction with products arising from the use of this
;material, there shall be no use of my name in any advertising,
;promotional, or sales literature without prior written consent in
;each case.
;THIS FILE NEEDS MORE WORK. Let me know if you test or fix it.
;The graphics control codes are sent over the current-output-port and
;can be mixed with regular text and ANSI or other terminal control
;sequences.
(define esc-string (string (integer->char #o33)))
(define tek41:init
(string-append
esc-string "%!0"
;;1. set tek mode
esc-string "MN0"
;;2. set character path to 0 (characters placed equal to rotation)
esc-string "MCB7C;"
;;3. set character size to 59 height
esc-string "MQ1"
;;4. set character precision to string
esc-string "MT1"
;;5. set character text index to 1
esc-string "MG1"
;;6. set character write mode to overstrike
esc-string "RK!"
;;7. clear the view
esc-string "SK!"
;;8. clear the segments
esc-string "LZ"
;;9. clear the dialog buffer
esc-string "%!1"
;;10. set ansi mode
))
(define (tek41:init) (display tek41:init-str) (force-output))
(define (tek41:reset)
(string-append
esc-string "%!0"
;;1. set tek mode
esc-string "LZ"
;;2. clear the dialog buffer
esc-string "%!1"
;;3. set ansi mode
))
(define (tek41:reset) (display tek41:reset-str) (force-output))
(define tek41:graphics-str
(string-append
esc-string "%!0"
;;1. set tek mode
esc-string (string (integer->char #o14))
;;2. clear the screen
esc-string "LV0"
;;3. set dialog area invisible
))
(define (tek41:graphics) (display tek41:graphics-str) (force-output))
(define tek41:text-str
(string-append
esc-string "LV1"
;;1. set dialog area visible
esc-string "%!1"
;;2. set ansi mode
))
(define (tek41:text) (display tek41:text-str) (force-output))
(define tek41:move-str
(string-append esc-string "LF"))
(define (tek41:move x y)
(display tek41:move-str)
(tek41:encode-x-y x y)
(force-output))
(define tek41:draw-str
(string-append esc-string "LG"))
(define (tek41:draw x y)
(display tek41:draw-str)
(tek41:encode-x-y x y)
(force-output))
(define tek41:set-marker-str (string-append esc-string "MM"))
(define tek41:draw-marker-str (string-append esc-string "LH"))
(define (tek41:point x y number)
(display tek41:set-marker-str)
(tek41:encode-int (remainder (max number 0) 11))
(display tek41:draw-marker-str)
(tek41:encode-x-y x y)
(force-output))
(define (tek41:encode-x-y x y)
(let ((hix (+ (quotient x 128) 32))
(lox (+ (modulo (quotient x 4) 32) 64))
(hiy (+ (quotient y 128) 32))
(loy (+ (modulo (quotient y 4) 32) 96))
(eb (+ (* (modulo y 4) 4) (modulo x 4) 96)))
(if (positive? hiy) (write-char (integer->char hiy)))
(if (positive? eb) (write-char (integer->char eb)))
(if (positive? (+ loy eb hix)) (write-char (integer->char loy)))
(if (positive? hix) (write-char (integer->char hix)))
(write-char (integer->char lox))))
(define (tek41:encode-int number)
(let* ((mag (abs number))
(hi1 (+ (quotient mag 1024) 64))
(hi2 (+ (modulo (quotient mag 16) 64) 64))
(lo (+ (modulo mag 16) 32)))
(if (>= number 0) (set! lo (+ lo 16)))
(if (not (= hi1 64)) (write-char (integer->char hi1)))
(if (or (not (= hi2 64))
(not (= hi1 64)))
(write-char (integer->char hi2)))
(write-char (integer->char lo))))
(define (test)
(tek41:init)
(tek41:reset)
(tek41:graphics)
(do ((i 0 (+ 1 i)))
((> i 15))
(tek41:linetype i)
(tek41:move (+ (* 200 i) 1000) 1000)
(tek41:draw (+ (* 200 i) 2000) 2000))
(tek41:text))
|
