Early microcomputer systems such as the Commodore 64 and many game consoles (which use televisions as a display device) commonly synchronize the system interrupt timer with the vertical frequency of the local television standard, either 59.94 Hz with NTSC systems, or 50.0 Hz with most PAL systems. Jiffy values for various Linux versions and platforms have typically varied between about 1 ms and 10 ms, with 10 ms reported as an increasingly common standard in the Jargon File.[6]