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203 lines
8.4 KiB
203 lines
8.4 KiB
15 years ago
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Subject: Re: ENTER keys
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In message <538902171@KSINET.COM>, John.ksi@KSINET.COM says:
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>
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> We're using MicroSoft's telnet software to connect to Stratus (VOS).
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> Using a VT100 emulator (yes, on both ends - I'm not THAT novice) we
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> find that the ENTER key (the key marked "Enter" on the PC's keypad)
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> does the same thing as the RETURN key (the key marked "Enter" on the
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> main part of the PC's keyboard) when it comes to working with CRT
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> forms.
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> ...
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> (A) why do the RETURN and ENTER keys behave the same?
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> (B) how does one submit a completed CRT form with ONE keystroke?
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To which <Paul_Green@vos.stratus.com> replied in message
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<199502171715.MAA11104@transfer.stratus.com>:
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| You don't say which ttp you are using on VOS, but I will assume
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| it is the vt100.ttp file.
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| The "keyboard" section of the vt100.ttp file defines the names
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| and key sequences used by the VT100 keys. In it we find:
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| enter-key Enter esc O M
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I have not used the Microsoft "telnet" application, but one standard
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setup option in a DEC VT100 (or VT220, VT340, VT420, VT510, etc.) is
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the "keypad mode"--what the behavior of the numeric keypad should be.
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The two modes are "application" and "numeric".
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In numeric mode, the various keypad keys send either the ASCII code
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for decimal digits, or the ASCII code for the comma, period, or
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hyphen, or (in the case of the keypad "Enter" key") the ASCII carriage
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return control character (or CR/LF if so configured).
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The "Enter" key behavior you describe is characteristic of numeric-
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keypad mode.
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The application mode is used by programs that don't need decimal
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digits so much but need lots of user-activated software functions.
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The DEC text-editing programs (EDT, EVE, etc.) are a classic example.
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In application mode, the keypad keys send special Escape sequences
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that chiefly begin with the so-called SS3 (single-shift G3) prefix,
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which in 7-bit ASCII representation is the "Esc O". (In 8-bit, SS3
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is the single code hexadecimal 8F.)
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The following chart summarizes the possible codes (7-bit) generated by
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the DEC terminals' keypad:
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Keypad Key Numeric Mode Application Mode
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---------- ------------ ----------------
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0 0 Esc O p
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1 1 Esc O q
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2 2 Esc O r
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3 3 Esc O s
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4 4 Esc O t
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5 5 Esc O u
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6 6 Esc O v
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7 7 Esc O w
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8 8 Esc O x
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9 9 Esc O y
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- - Esc O m
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, , Esc O l
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. . Esc O n
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Enter carriage return Esc O M
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PF1 Esc O P Esc O P
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PF2 Esc O Q Esc O Q
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PF3 Esc O R Esc O R
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PF4 Esc O S Esc O S
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was intended for use by programs that
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This is a matter that my site has encountered in a slightly different form.
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Article 2620 of comp.protocols.kermit.misc:
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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
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From: jrd@cc.usu.edu (Joe Doupnik)
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Newsgroups: comp.protocols.kermit.misc
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Subject: Re: Defining functional keys
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Message-ID: <1995Apr22.122257.48276@cc.usu.edu>
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Date: 22 Apr 95 12:22:57 MDT
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References: <3n5307$jdd@kaie.va.ttu.ee>
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Organization: Utah State University
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Lines: 109
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In article <3n5307$jdd@kaie.va.ttu.ee>, uuno@sofia.va.ttu.ee (Uuno Vallner) writes:
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> We try to use KERMIT DOS as terminal. We have Novel and Unix
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> mixed network. We try access to OSF/1 via IPX using Softnet in OSF/1.
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>
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> We defined Kermit port bios3. It works perfectly. We need to use estonian
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> characters. We are resolved this problem too. But ...
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>
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> We use application in OSF/1 (text retrieval system trip), which needs
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> for operating Application keypad (7,8. 9 ..1,0 ...)and some functional keys.
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> But Kermit are using 7 as "home"
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>
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> Kermit interpreted non correct functional keys. After pressing f1, system
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> sends only ESC , after next f1 follows code and new ESC. Same effect is with
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> array keys.
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--------------
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I think there is some confusion about DEC versus IBM PC keys.
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The relationship is detailed in distribution file MSVIBM.VT and also
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in the user's manual book "Using MS-DOS Kermit." The IBM PC numeric
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keypad keys are not necessarily related to the DEC KeyPad keys. Here
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is a cutout from my copy of msvibm.vt:
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1. VT320/VT102/VT52/Heath-19 EMULATOR IN MS-DOS KERMIT IBM-PC, CODE SUMMARY
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VT320/VT102 keypads Heath-19 and VT52 Keypads
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IBM keys IBM Keys
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+------+------+------+------+ +------+------+-------+----------+
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| PF1 | PF2 | PF3 | PF4 | | Blue | Red | Grey | up arrow | - Vendor
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| F1 | F2 | F3 | F4 | | F1 | F2 | F3 | up arrow | - Kermit
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+------+------+------+------+ +------+------+-------+----------+
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| 7 | 8 | 9 | - | | 7 | 8 | 9 |down arrow|
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| F5 | F6 | F7 | F8 | | F5 | F6 | F7 |down arrow|
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+------+------+------+------+ +------+------+-------+----------+
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| 4 | 5 | 6 | , | | 4 | 5 | 6 | rgt arrow|
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| F9 | F10 | SF1 | SF2 | | F9 | F10 | SF1 | rgt arrow|
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+------+------+------+------+ +------+------+-------+----------+
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| 1 | 2 | 3 | E | | 1 | 2 | 3 |left arrow|
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| SF3 | SF4 | SF5 | n S| | SF3 | SF4 | SF5 |left arrow|
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+------+------+------+ t F| +------+------+-------+----------+
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| 0------0 | . | e 6| | 0------0 | . | Enter |
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| SF7 | SF8 | r | | SF7 | SF8 | SF6 |
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+-------------+------+------+ +-------------+-------+----------+
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SF1 means push Shift and F1 keys simultaneously
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---------------------------------------------------------------------------
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Below, the acronyms CSI and SS3 stand for 8-bit control codes in an 8-bit
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environment or for their 7-bit equivalents "ESC [" and "ESC O", respectively.
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Command SET TERMINAL CONTROL {8-BIT | 7-BIT}, and an equivalent command from
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the host, determines the usage for output text; use of parity forces 7-bit
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mode. CSI is decimal 155, SS3 is decimal 143. Similarly, DCS is decimal 144
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or ESC P and ST is decimal 156 or ESC \. APC is decimal 159 or ESC _.
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---------------------------------------------------------------------------
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Codes sent by DEC and Heath arrow keys
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Key Verb IBM VT320/VT102 mode VT52/H19 mode
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key Cursor Application Cursor or Application
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up uparr up CSI A SS3 A ESC A
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down dnarr down CSI B SS3 B ESC B
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right rtarr right CSI C SS3 C ESC C
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left lfarr left CSI D SS3 D ESC D
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Codes sent by DEC editing keys, not preassigned to keys.
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Key Verb VT320 mode VT102/VT52/H19 mode
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Find decFind CSI 1 ~ these keys
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Insert Here decInsert CSI 2 ~ send nothing
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Remove decRemove CSI 3 ~
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Select decSelect CSI 4 ~
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Prev Screen decPrev CSI 5 ~
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Next Screen decNext CSI 6 ~ ~ is ASCII chart 7/14
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Codes sent by DEC Numeric Keypad
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Key Verb IBM ANSI VT320/VT102 mode VT52/H19 mode
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key Numeric Application Numeric Application
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PF1/HF7/Blue Gold,pf1 F1 SS3 P SS3 P ESC P ESC P
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PF2/HF8/Red pf2 F2 SS3 Q SS3 Q ESC Q ESC Q
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PF3/HF9/Grey pf3 F3 SS3 R SS3 R ESC R ESC R
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PF4/HF1 pf4 F4 SS3 S SS3 S ESC S ESC S
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0 kp0 SF7 0 SS3 p 0 ESC ? p
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1 kp1 SF3 1 SS3 q 1 ESC ? q
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2 kp2 SF4 2 SS3 r 2 ESC ? r
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3 kp3 SF5 3 SS3 s 3 ESC ? s
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4 kp4 F9 4 SS3 t 4 ESC ? t
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5 kp5 F10 5 SS3 u 5 ESC ? u
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6 kp6 SF1 6 SS3 v 6 ESC ? v
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7 kp7 F5 7 SS3 w 7 ESC ? w
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8 kp8 F6 8 SS3 x 8 ESC ? x
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9 kp9 F7 9 SS3 y 9 ESC ? y
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comma (,) kpcoma SF2 , SS3 l , ESC ? l
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minus (-) kpminus F8 - SS3 m - ESC ? m
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period (.) kpdot SF8 . SS3 n . ESC ? n
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Enter kpenter SF6 CR or SS3 M CR or ESC ? M
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CR LF (newline on) CR LF
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(SFn means hold down Shift key while pressing Function key n.)
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---------------
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Please note that \Kkp0...\Kkp0 are placed on IBM PC function
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keys by default. You can redefine such things using Kermit command
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SET KEY, as discussed in depth in "Using MS-DOS Kermit."
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I don't quite understand why you are using SET PORT BIOS3. Do
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you have some Int 14h interceptor present to route traffic to the net?
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For real serial ports BIOS3 is terrible. If you are using Novell's ODI
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material then Kermit can operate as a native ODI client (using it's
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internal TCP/IP stack). This is discussed in the release notes.
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Joe D.
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