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| util:svdm [2022/06/09 12:58] – capitalize MODEM to get the acronym definition popup digital man | util:svdm [2025/03/29 19:54] (current) – [Configure] maybe -> may be deuce |
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| ====== Synchronet Virtual DOS Modem ====== | ====== Synchronet Virtual DOS Modem ====== |
| SVDM is a MODEM emulator for Windows which utilizes the Synchronet Virtual UART/FOSSIL Driver (''DOSXTRN.EXE/SBBSEXEC.DLL'') to enable support for DOS communications programs on Windows NT-based operating systems. 64-bit Windows support is enabled by also installing [[http://www.columbia.edu/~em36/ntvdmx64.html|NTVDMx64]]. | SVDM is a MODEM emulator for Windows which utilizes the Synchronet Virtual UART/FOSSIL Driver (''DOSXTRN.EXE/SBBSEXEC.DLL'') to enable support for DOS communications programs on Windows NT-based operating systems. 64-bit Windows support is enabled by also installing [[https://mendelson.org/ntvdmx64.html|NTVDMx64]]. |
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| SVDM should run on 32-bit and 64-bit editions of Windows XP and later. | SVDM should run on 32-bit and 64-bit editions of Windows XP and later. |
| AT&ZL? | AT&ZL? |
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| Save dial strings (numbers) can be dialed by using the ''ATDSn'' command: | Saved dial strings (numbers) can be dialed by using the ''ATDSn'' command: |
| ATDS0 | ATDS0 |
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| If your DOS terminal program of choice has trouble dialing long dial strings (e.g. accommodating long DNS hostnames or IPv6 addresses), try using the saved number storage feature to resolve that limitation. After enter the following command, dialing "S0" as a "phone number" would actually connect to "telnet:vert.synchro.net:23". | If your DOS terminal program of choice has trouble dialing long dial strings (e.g. accommodating long DNS hostnames or IPv6 addresses), try using the saved number storage feature to resolve that limitation. After enter the following command, dialing "S0" as a "phone number" would actually connect to "telnet:vert.synchro.net:23". |
| AT&Z0=telnet:vert.synchro.net:23 | AT&Z0=telnet:vert.synchro.net:23 |
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| | Another option for dialing longer dial strings is to specify "aliases" in the ''[alias]'' section of your ''svdm.ini'' file. Any combination of printable ASCII characters may be used for a dial string alias, except for the colon ('':'') and equals (''='') characters. |
| | <code ini> |
| | [alias] |
| | vertrauen=telnet:vert.synchro.net:23 |
| | </code> |
| | ATDvertrauen |
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| ===== Configure ===== | ===== Configure ===== |
| | //Root// | ''IpFilterFile'' | //blank// | Path/filename of file containing lists of IP addresses/patterns/ranges to reject incoming connections from | | | //Root// | ''IpFilterFile'' | //blank// | Path/filename of file containing lists of IP addresses/patterns/ranges to reject incoming connections from | |
| | //Root// | ''clientFile'' | ''client.ini'' | File to write incoming connected client information (e.g. IP address), blank to disable | | | //Root// | ''clientFile'' | ''client.ini'' | File to write incoming connected client information (e.g. IP address), blank to disable | |
| | | //Root// | ''MainLoopDelay'' | ''0'' | Milliseconds to yield CPU in application main loop | |
| | | //Root// | ''SocketSelectTimeout'' | ''0'' | Milliseconds to wait for receive data on TCP socket | |
| | ''Modem'' | ''AutoAnswer'' | ''false'' | Automatically answer/accept incoming TCP-connection attempts (''ATS0'') | | | ''Modem'' | ''AutoAnswer'' | ''false'' | Automatically answer/accept incoming TCP-connection attempts (''ATS0'') | |
| | ''Modem'' | ''CallerID'' | ''false'' | Incoming/client IP address reporting between RING results (''AT+VCID'' or ''AT#CID'') | | | ''Modem'' | ''CallerID'' | ''false'' | Incoming/client IP address reporting between RING results (''AT+VCID'' or ''AT#CID'') | |
| | ''UART'' | ''IRQ'' | //depends// | Hardware interrupt request (IRQ) line to virtualize, e.g. 4 | | | ''UART'' | ''IRQ'' | //depends// | Hardware interrupt request (IRQ) line to virtualize, e.g. 4 | |
| | ''UART'' | ''Address'' | //depends// | Hardware I/O port base address (use ''0x'' prefix for hexadecimal notation, e.g. ''0x3f8'') | | | ''UART'' | ''Address'' | //depends// | Hardware I/O port base address (use ''0x'' prefix for hexadecimal notation, e.g. ''0x3f8'') | |
| | ''sockopts'' | various | | See ''[[config:sockopts.ini]]'' | | | ''alias'' | various | | Each key is a unique dial string alias (e.g. ''mybbs = protocol:address:port'') | |
| | | ''sockopts'' | various | | Options listed at ''[[config:sockopts.ini]]'' may be included in the ''[sockopts]'' section (for advanced uses only) | |
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| Settings changed via modem AT command take precedence over command-line options which take precedence over .ini file settings. | Settings changed via modem AT command take precedence over command-line options which take precedence over ''.ini'' file settings. |
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| Settings in the //Root// section may also be specified in a program-specific section (named after the program itself), to create program-specific settings. | Settings in the //Root// section may also be specified in a program-specific section (named after the program itself), to create program-specific settings. |
| | ''Vn'' | Control verbal result codes (e.g. ''ATV0'' enables //numeric// result mode) | | | ''Vn'' | Control verbal result codes (e.g. ''ATV0'' enables //numeric// result mode) | |
| | ''Xn'' | Control extended result codes (e.g. ''ATX0'' disables extended result codes) | | | ''Xn'' | Control extended result codes (e.g. ''ATX0'' disables extended result codes) | |
| | ''Z'' | Initialize/re-initialize modem | | | ''Z'' | Initialize/re-initialize modem (e.g. re-read ''.ini'' file) | |
| | ''&W'' | Write modem settings to ''.ini'' file | | | ''&W'' | Write modem settings to ''.ini'' file | |
| | ''&Zn=s'' | Store a dial string //s// into slot //n// (0-19) | | | ''&Zn=s'' | Store a dial string //s// into slot //n// (0-19) | |
