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Welcome! This is a project to convert a standard Commodore C116 computer from PAL to NTSC.
The best place to get the parts is from a dead NTSC Plus/4 computer. Most "dead" machines are due to a defective TED chip.
There is not much to this one. De-solder the 17.734 MHz crystal at Y1 and replace it with the 14.31818 MHz Crystal. Remove the C116 Kernal ROM (U4) and replace with Kernal ROM from the Plus/4 (found at U24).
This will give you correct NTSC output from the video connector. You may need to adjust CT1.
COMPLETED! Sept 25/08
Last updated: Oct 21/2009, 12:15pm EST
Send comments or feedback to Steve Gray(sjgray@rogers.com)