Posted August 29, 200717 yr I am using WriteFile to write directly to LPT1, where I have an Epson POS printer. This works fine unless I have a printer (anything, 'Generic / Text only', the printer itself) setup to use LPT1 in windows. Somehow having LPT1 in use in windows is preventing my data from sending correctly. I have enabled the option 'Use any interrupt' on my LPT1, and that works only until I reboot the machine. Has anyone ever encountered this before?
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