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202 lines
8.4 KiB
202 lines
8.4 KiB
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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