Here is the direct solution path for Windows 10 (32-bit or 64-bit): Windows 10 has a built-in driver that works perfectly for the InfoPrint 6500's standard PCL or line printer emulation.
For the (a legacy line matrix printer, also sold under Ricoh/Ricoh InfoPrint branding later), finding a native Windows 10 driver can be tricky because IBM stopped active support for this model years ago. ibm infoprint 6500 driver windows 10