MosChip MCS9865 Driver Download (Official)

MosChip Drivers

The MCS9865 is a network device manufactured by MosChip. Issues like weak Wi-Fi signal, slow DNS lookup, duplicate IP addresses, slow network and excessive CPU usage can be solved by updating this driver. This version of "" is rated (5 out of 5 stars) based on 79 downloads and 4 reviews. It is compatible with PCs running Windows Vista, among other operating systems. The total disk space used for this update is 1.5 MB.

4 Ratings

Supported Models


High-Speed PCI Serial Port

PCI ECP Parallel Port

PCI Multifunction-IO Controller

PCI-ISA Communication Port

PCI-ISA Parallel Port



Supported Operating Systems

Windows Vista, Windows Vista (64 bit)

File Name

Versions (22-May-2008) (2008-05-22) via .inf

Additional Notes

MCS9865 is a PCI based Peripheral Controller. It supports dual-channel high performance Serial Ports, dual enhanced IEEE 1284 compliant parallel ports and an ISA style interface. The PCI interface of MCS9865 is fully Compliant with PCI Local Bus Specification, Revision 2.3. It supports five functions through single device

Uploaded By

Sathishkumar (DG Staff Member) on 17-Aug-2009

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
MCS9865_Vista_UM_Ver0.2.pdf 786.2 KB 19 May 2008
Vista32Bit/PciMf.inf 8.9 KB 23 May 2008
Vista32Bit/PciPorts.inf 12.4 KB 23 May 2008
Vista32Bit/PciSetup.exe 262.1 KB 23 May 2008
Vista32Bit/X86/MOSCHIP_PciUninst.exe 249.9 KB 22 May 2008
Vista32Bit/X86/PciIsaSerial.sys 66.6 KB 22 May 2008
Vista32Bit/X86/PciPPorts.sys 81.9 KB 22 May 2008
Vista32Bit/X86/PciPorts.dll 63.5 KB 25 Apr 2008
Vista32Bit/X86/PciSPorts.sys 115.7 KB 22 May 2008
Vista32Bit/ 13.5 KB 9 Jun 2008
Vista64Bit/AMD64/MOSCHIP_PCIUninst.exe 333.8 KB 22 May 2008
Vista64Bit/AMD64/PciIsaSerial.sys 72.2 KB 22 May 2008
Vista64Bit/AMD64/PciPPorts.sys 95.7 KB 22 May 2008
Vista64Bit/AMD64/PciPorts.dll 77.3 KB 25 Apr 2008
Vista64Bit/AMD64/PciSPorts.sys 126.5 KB 22 May 2008
Vista64Bit/PCISetup.exe 358.4 KB 23 May 2008
Vista64Bit/PciMf.inf 8.9 KB 23 May 2008
Vista64Bit/PciPorts.inf 12.4 KB 23 May 2008
Vista64Bit/ 13.5 KB 9 Jun 2008

How to Update MCS9865 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the MCS9865 driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter MosChip MCS9865 into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the MosChip Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the MosChip website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with MosChip. All company names/logos are properties of their owners.
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