1 Subject: Re: ENTER keys
3 In message <538902171@KSINET.COM>, John.ksi@KSINET.COM says:
5 > We're using MicroSoft's telnet software to connect to Stratus (VOS).
6 > Using a VT100 emulator (yes, on both ends - I'm not THAT novice) we
7 > find that the ENTER key (the key marked "Enter" on the PC's keypad)
8 > does the same thing as the RETURN key (the key marked "Enter" on the
9 > main part of the PC's keyboard) when it comes to working with CRT
12 > (A) why do the RETURN and ENTER keys behave the same?
13 > (B) how does one submit a completed CRT form with ONE keystroke?
15 To which <Paul_Green@vos.stratus.com> replied in message
16 <199502171715.MAA11104@transfer.stratus.com>:
18 | You don't say which ttp you are using on VOS, but I will assume
19 | it is the vt100.ttp file.
21 | The "keyboard" section of the vt100.ttp file defines the names
22 | and key sequences used by the VT100 keys. In it we find:
24 | enter-key Enter esc O M
27 I have not used the Microsoft "telnet" application, but one standard
28 setup option in a DEC VT100 (or VT220, VT340, VT420, VT510, etc.) is
29 the "keypad mode"--what the behavior of the numeric keypad should be.
31 The two modes are "application" and "numeric".
33 In numeric mode, the various keypad keys send either the ASCII code
34 for decimal digits, or the ASCII code for the comma, period, or
35 hyphen, or (in the case of the keypad "Enter" key") the ASCII carriage
36 return control character (or CR/LF if so configured).
38 The "Enter" key behavior you describe is characteristic of numeric-
41 The application mode is used by programs that don't need decimal
42 digits so much but need lots of user-activated software functions.
43 The DEC text-editing programs (EDT, EVE, etc.) are a classic example.
44 In application mode, the keypad keys send special Escape sequences
45 that chiefly begin with the so-called SS3 (single-shift G3) prefix,
46 which in 7-bit ASCII representation is the "Esc O". (In 8-bit, SS3
47 is the single code hexadecimal 8F.)
49 The following chart summarizes the possible codes (7-bit) generated by
50 the DEC terminals' keypad:
52 Keypad Key Numeric Mode Application Mode
53 ---------- ------------ ----------------
67 Enter carriage return Esc O M
74 was intended for use by programs that
79 This is a matter that my site has encountered in a slightly different form.
81 Article 2620 of comp.protocols.kermit.misc:
82 Path: cs.utk.edu!cssun.mathcs.emory.edu!hobbes.cc.uga.edu!news-feed-1.peachnet.edu!gatech!swrinde!cs.utexas.edu!news.cs.utah.edu!cc.usu.edu!jrd
83 From: jrd@cc.usu.edu (Joe Doupnik)
84 Newsgroups: comp.protocols.kermit.misc
85 Subject: Re: Defining functional keys
86 Message-ID: <1995Apr22.122257.48276@cc.usu.edu>
87 Date: 22 Apr 95 12:22:57 MDT
88 References: <3n5307$jdd@kaie.va.ttu.ee>
89 Organization: Utah State University
92 In article <3n5307$jdd@kaie.va.ttu.ee>, uuno@sofia.va.ttu.ee (Uuno Vallner) writes:
93 > We try to use KERMIT DOS as terminal. We have Novel and Unix
94 > mixed network. We try access to OSF/1 via IPX using Softnet in OSF/1.
96 > We defined Kermit port bios3. It works perfectly. We need to use estonian
97 > characters. We are resolved this problem too. But ...
99 > We use application in OSF/1 (text retrieval system trip), which needs
100 > for operating Application keypad (7,8. 9 ..1,0 ...)and some functional keys.
101 > But Kermit are using 7 as "home"
103 > Kermit interpreted non correct functional keys. After pressing f1, system
104 > sends only ESC , after next f1 follows code and new ESC. Same effect is with
108 I think there is some confusion about DEC versus IBM PC keys.
109 The relationship is detailed in distribution file MSVIBM.VT and also
110 in the user's manual book "Using MS-DOS Kermit." The IBM PC numeric
111 keypad keys are not necessarily related to the DEC KeyPad keys. Here
112 is a cutout from my copy of msvibm.vt:
115 1. VT320/VT102/VT52/Heath-19 EMULATOR IN MS-DOS KERMIT IBM-PC, CODE SUMMARY
117 VT320/VT102 keypads Heath-19 and VT52 Keypads
119 +------+------+------+------+ +------+------+-------+----------+
120 | PF1 | PF2 | PF3 | PF4 | | Blue | Red | Grey | up arrow | - Vendor
121 | F1 | F2 | F3 | F4 | | F1 | F2 | F3 | up arrow | - Kermit
122 +------+------+------+------+ +------+------+-------+----------+
123 | 7 | 8 | 9 | - | | 7 | 8 | 9 |down arrow|
124 | F5 | F6 | F7 | F8 | | F5 | F6 | F7 |down arrow|
125 +------+------+------+------+ +------+------+-------+----------+
126 | 4 | 5 | 6 | , | | 4 | 5 | 6 | rgt arrow|
127 | F9 | F10 | SF1 | SF2 | | F9 | F10 | SF1 | rgt arrow|
128 +------+------+------+------+ +------+------+-------+----------+
129 | 1 | 2 | 3 | E | | 1 | 2 | 3 |left arrow|
130 | SF3 | SF4 | SF5 | n S| | SF3 | SF4 | SF5 |left arrow|
131 +------+------+------+ t F| +------+------+-------+----------+
132 | 0------0 | . | e 6| | 0------0 | . | Enter |
133 | SF7 | SF8 | r | | SF7 | SF8 | SF6 |
134 +-------------+------+------+ +-------------+-------+----------+
136 SF1 means push Shift and F1 keys simultaneously
137 ---------------------------------------------------------------------------
138 Below, the acronyms CSI and SS3 stand for 8-bit control codes in an 8-bit
139 environment or for their 7-bit equivalents "ESC [" and "ESC O", respectively.
140 Command SET TERMINAL CONTROL {8-BIT | 7-BIT}, and an equivalent command from
141 the host, determines the usage for output text; use of parity forces 7-bit
142 mode. CSI is decimal 155, SS3 is decimal 143. Similarly, DCS is decimal 144
143 or ESC P and ST is decimal 156 or ESC \. APC is decimal 159 or ESC _.
144 ---------------------------------------------------------------------------
145 Codes sent by DEC and Heath arrow keys
146 Key Verb IBM VT320/VT102 mode VT52/H19 mode
147 key Cursor Application Cursor or Application
149 up uparr up CSI A SS3 A ESC A
150 down dnarr down CSI B SS3 B ESC B
151 right rtarr right CSI C SS3 C ESC C
152 left lfarr left CSI D SS3 D ESC D
154 Codes sent by DEC editing keys, not preassigned to keys.
155 Key Verb VT320 mode VT102/VT52/H19 mode
157 Find decFind CSI 1 ~ these keys
158 Insert Here decInsert CSI 2 ~ send nothing
159 Remove decRemove CSI 3 ~
160 Select decSelect CSI 4 ~
161 Prev Screen decPrev CSI 5 ~
162 Next Screen decNext CSI 6 ~ ~ is ASCII chart 7/14
164 Codes sent by DEC Numeric Keypad
165 Key Verb IBM ANSI VT320/VT102 mode VT52/H19 mode
166 key Numeric Application Numeric Application
168 PF1/HF7/Blue Gold,pf1 F1 SS3 P SS3 P ESC P ESC P
169 PF2/HF8/Red pf2 F2 SS3 Q SS3 Q ESC Q ESC Q
170 PF3/HF9/Grey pf3 F3 SS3 R SS3 R ESC R ESC R
171 PF4/HF1 pf4 F4 SS3 S SS3 S ESC S ESC S
172 0 kp0 SF7 0 SS3 p 0 ESC ? p
173 1 kp1 SF3 1 SS3 q 1 ESC ? q
174 2 kp2 SF4 2 SS3 r 2 ESC ? r
175 3 kp3 SF5 3 SS3 s 3 ESC ? s
176 4 kp4 F9 4 SS3 t 4 ESC ? t
177 5 kp5 F10 5 SS3 u 5 ESC ? u
178 6 kp6 SF1 6 SS3 v 6 ESC ? v
179 7 kp7 F5 7 SS3 w 7 ESC ? w
180 8 kp8 F6 8 SS3 x 8 ESC ? x
181 9 kp9 F7 9 SS3 y 9 ESC ? y
182 comma (,) kpcoma SF2 , SS3 l , ESC ? l
183 minus (-) kpminus F8 - SS3 m - ESC ? m
184 period (.) kpdot SF8 . SS3 n . ESC ? n
185 Enter kpenter SF6 CR or SS3 M CR or ESC ? M
186 CR LF (newline on) CR LF
187 (SFn means hold down Shift key while pressing Function key n.)
190 Please note that \Kkp0...\Kkp0 are placed on IBM PC function
191 keys by default. You can redefine such things using Kermit command
192 SET KEY, as discussed in depth in "Using MS-DOS Kermit."
193 I don't quite understand why you are using SET PORT BIOS3. Do
194 you have some Int 14h interceptor present to route traffic to the net?
195 For real serial ports BIOS3 is terrible. If you are using Novell's ODI
196 material then Kermit can operate as a native ODI client (using it's
197 internal TCP/IP stack). This is discussed in the release notes.