I am interfacing all my various GPS modules (NMEA, TSIP, TEP, UBX, etc...)
to my XP machine through a virtual com port Prolific 2303 chipset/drivers
(sold all over eBay for about $2.00). The Silicon Labs 2102 chipset works as
well.
Not sure if this is germane to this thread, ...but I have never seen such a
serial port issue you'all are describing.
-Don
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