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- The Poor Man's Line Monitor (PMLM.EXE) is basically of interest
- to developers of comm applications and those providing technical
- support for those applications. This SIO utility is released
- largely (in self defense) in the hope that some users can
- diagnose their own problems. PMLM's feature of saving trace
- information to disk will only work with registered and beta
- versions of SIO.
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- PMLM provides basic line monitoring for OS/2, DOS and Windows
- comm programs. All characters sent or received by application
- programs are displayed in the upper portion of the screen.
- Receive characters are displayed as "white on blue" and
- transmitted characters are displayed "yellow on violet". Line
- signals, such as CTS are displayed as "dim white on red" when
- turned off and "bright white on red" when turned on. In
- addition, a signals transition to OFF is displayed in lower case
- and a signals transition to ON is displayed in upper case.
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- Status information is displayed in the lower part of the screen.
- A bright white display means the signal is on, a dim white
- indicates that the signal is off. In addition, when bright,
- Rxoff and Txoff indicate the SIO has sent (Txoff) or received
- (Rxoff) an Xoff, and an Xon is pending.
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- When a DOS or Windows session uses a comm port, an additional
- line of signal status appears. This status line shows the state
- of the virtual UART's signals. Only the signals which MAY be
- different from the real UART's signals are shown.
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- "Rx Chars" and "Tx Chars" reflects the number of characters in
- SIO's receive and transmit buffers respectively.
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- The last line on the screen shows the keys (from the keyboard)
- that PMLM will recognize. The bright character shows the key to
- hit for the associated function. The font keys will not work in
- a windowed OS/2 session.
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- PMLM's command line requires one parameter, the comm port number,
- and optionally accepts an additional parameter giving a save
- trace file name. For example, PMLM 1 COM1INFO.TEC will monitor
- COM1 and save ALL of the communications traffic in the file
- COM1INFO.TRC. The trace files created by PMLM contain exactly
- the same information that is displayed by PMLM, video attributes
- and all.
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- VIEWPMLM.EXE may be used to view trace files created by PMLM.
- VIEWPMLM.EXE requires one parameter, the trace file name. The
- user can use the keys UP, DOWN, PAGEUP, PAGEDOWN, HOME, and END
- to navigate the saved trace file. Registered SIO users may send
- VIEWPMLM.EXE (along with saved trace files) to anyone for
- technical support purposes.
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- VIEWPMLM can be used in native DOS, in DOS sessions under OS/2,
- and in OS/2 sessions. This means that even those developers and
- support people need not have OS/2 to view the captured
- communications data created by PMLM.
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