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- ID:SP Serial Port Printing in DESQview
- DESQview Technical Note
-
-
- If you are going to initialize a serial port in a DESQview
- window, you will need to have the window installed with the "Can
- be swapped to disk" option turned off, otherwise the Com port
- cannot be accessed due to the port protection mechanism of
- DESQview. Trying to intialize a com port from a window which is
- "Swappable" will result in a DOS message: "Invalid parameter
- 'com?' since DOS will not see the port as available.
-
- Usually a better solution is to initialize the port with MODE and
- do the LPT redirection before running DESQview. In this fashion,
- a program can be swapped to disk and still address the COM port
- for printing, since the actual redirection of print is handled
- outside of DESQview.
-
- If you also have parallel printers, they can be set to a printer
- port other than the one being redirected to the COM port.
- Remember that a printer port can be addressed as a logical device
- by DOS - that is, you do not have to actually have a port set up
- as LPT2 in order to direct it to COM1. The logical parallel
- printer ports supported by DOS are LPT1, LPT2 and LPT3.
-