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The Original Shareware 1.1
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The Original Shareware (WeMake CDs)(Volume 1.1)(CDs, Inc)(1993).iso
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SER_PRN.TEC
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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.