Avoid sites like intel-drivers-download.com or manualsonline.biz . They often require you to download a ".exe" file or enter credit card info. Legitimate Intel desktop board manuals are always PDF files , typically 2-15 MB.
Before you can find the right , you need to understand that "01" is rarely the model name itself. It is usually part of a longer string of characters printed directly on the motherboard. intel desktop board 01 manual
If the PC is still functional, you can find the model by opening System Information in Windows or running the command wmic baseboard get product,Manufacturer in the Command Prompt. University of Colorado Boulder Common Manual Contents Intel® Desktop Board D915PBL Product Guide - The Retro Web Avoid sites like intel-drivers-download