The MCS9901 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. Visitors have downloaded this file "MCS9901_Vista.zip" 139 times with an aggregate rating of 5 out of 5 stars based on 4 reviews. The uploader reports that this update will work successfully on PCs running Windows Vista. The total disk space used for this update is 1.2 MB.
MCS9901
High-Speed PCIe Serial Port
PCI-Express Multi-IO Controller
PCIe ECP Parallel Port
PCIe-IO Bridge
PCIe-ISA Communication Port
PCIe-ISA Parallel Port
Windows Vista, Windows Vista (64 bit)
1.0.0.4 (29-Jan-2008)
1.0.0.4 (2008-01-28) via .inf
MCS9901 is a single lane PCI Express (PCIe) based Peripheral Controller. It is a single chip solution for PCIe based Serial, Parallel Port expansion add-in cards. MCS9901 supports four high performance Serial Ports, one IEEE 1284 compliant parallel port, one USB 2.0 host controller and ISA style interface.
Sathishkumar (DG Staff Member) on 14-Aug-2009
PCI\VEN_9710&DEV_9901&SUBSYS_1000A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_2000A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_3001A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_3002A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_3003A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_3004A000&REV_00
PCI\VEN_9710&DEV_9901&SUBSYS_3011A000&REV_00
PCI\VEN_9710&DEV_9902&SUBSYS_1000A000&REV_00
The following files are found inside the driver download file.
Name | Size | Date |
---|---|---|
MCS9901_Vista/AMD64/ISASerial.sys | 73.2 KB | 29 Jan 2008 |
MCS9901_Vista/AMD64/MOSCHIP_PCIeUninst.exe | 49.2 KB | 29 Jan 2008 |
MCS9901_Vista/AMD64/PCIeCoInst.dll | 13.3 KB | 29 Jan 2008 |
MCS9901_Vista/AMD64/PCIePorts.dll | 77.3 KB | 29 Jan 2008 |
MCS9901_Vista/AMD64/PPorts.sys | 96.8 KB | 29 Jan 2008 |
MCS9901_Vista/AMD64/SPorts.sys | 124.4 KB | 29 Jan 2008 |
MCS9901_Vista/MCS9901_Vista_UM_Ver0.3.pdf | 851.2 KB | 19 Feb 2008 |
MCS9901_Vista/PCIeMF.inf | 11.3 KB | 29 Jan 2008 |
MCS9901_Vista/PCIeNull.inf | 1.9 KB | 29 Jan 2008 |
MCS9901_Vista/PCIePorts.inf | 17.1 KB | 29 Jan 2008 |
MCS9901_Vista/PCIeSetup.exe | 266.2 KB | 29 Jan 2008 |
MCS9901_Vista/X86/ISASerial.sys | 66.6 KB | 29 Jan 2008 |
MCS9901_Vista/X86/MOSCHIP_PCIeUninst.exe | 49.2 KB | 29 Jan 2008 |
MCS9901_Vista/X86/PCIeCoInst.dll | 11.3 KB | 29 Jan 2008 |
MCS9901_Vista/X86/PCIePorts.dll | 63.5 KB | 29 Jan 2008 |
MCS9901_Vista/X86/PPorts.sys | 82.9 KB | 29 Jan 2008 |
MCS9901_Vista/X86/SPorts.sys | 114.2 KB | 29 Jan 2008 |
To get the MCS9901 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 MCS9901 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.
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.
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
Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.
Select the Driver tab.
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.