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NOTE:

• Windows 8/8.1/10 are NOT supported in PL-2303HXA and PL-2303X EOL chip versions.
• Run PL2303 CheckChipVersion tool program in Windows XP/Vista/7 to check chip version.
• Windows XP, 2000, 98 and Windows ME driver technical support is discontinued.
• Prolific recommends to use PL-2303HXD (HX Rev D) or PL2303TA chip.

Device using PL-2303 H/HXA/HX/X version chips

Driver Version: 3.3.2.102

Driver Date: 09/29/08

Supported device ID and product strings: . VID_067B&PID_2303 for "Prolific USB-to-Serial Comm Port" 

Please be warned that counterfeit (fake) PL-2303HX (Chip Rev A) USB to Serial Controller ICs using Prolific's trademark logo, brandname, and device drivers, were being sold in the China market. Counterfeit IC products show exactly the same outside chip markings but generally are of poor quality and causes Windows driver compatibility issues (Yellow Mark Error Code 10 in Device Manager). We issue this warning to all our customers and consumers to avoid confusion and false purchase. 

; for 16-bit app support

[386Enh]

woafont=dosapp.fon

EGA80WOA.FON=EGA80WOA.FON

EGA40WOA.FON=EGA40WOA.FON

CGA80WOA.FON=CGA80WOA.FON

CGA40WOA.FON=CGA40WOA.FON

[drivers]

wave=mmdrv.dll

timer=timer.drv

[mci] 

The claim is that the tweak (IRQn=4096) improves network performance by allocating 4 megabytes of memory as a buffer for the IRQ (n) used by your network adapter. However:

• The setting has no effect on actual memory allocation.
• The setting does not actually affect network performance in carefully controlled tests. (Anecdotal reports are mixed, and unreliable due to Internet and system variabilities, particularly the effects of caching.)
• There is no apparent evidence that there even is any such setting in Microsoft documentation.

Windows does not allocate buffer memory for IRQ's. (Buffers are the responsibility of device drivers, which allocate them by device, not by IRQ. On the PCI bus, a single IRQ can be shared by multiple devices.)