Parallel Port Dog Driver Page
UCHAR testVal = 0x5A; // Write to parallel port data register WRITE_PORT_UCHAR((PUCHAR)devExt->PortBase + 0x00, testVal); // Small delay (not KeStall for production) KeStallExecutionProcessor(50); UCHAR readVal = READ_PORT_UCHAR((PUCHAR)devExt->PortBase + 0x00);
These drivers must be loaded before the application launches, often via CONFIG.SYS or AUTOEXEC.BAT . parallel port dog driver
If you must keep legacy industrial software running, you have three viable paths. UCHAR testVal = 0x5A; // Write to parallel
Enable Plug and Play for parallel port devices - Windows Server UCHAR testVal = 0x5A