486DX266 or later PC compatible computer with at least 4MB RAM and a DOS compatible file system Open 25pin parallel port for control 500k free disk space (7M for source code and development tools). TurboCNC can be run from a floppy disk, but a hard drive installation is generally better A 66 MHz or faster clock speed is recommended for satisfactory performance. Almost any home or office computer system made after 1993 will meet these requirements. However, some fairly modern industrial control computers may not. Consult your owners manuals to be sure. TurboCNC will report if any critical things are missing at startup. For very old computers or those that dont have a math coprocessor, try using version 3.0f of TurboCNC instead. This is available in the web archive for download