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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: save2600 on October 12, 2019, 01:54:34 PM

Title: Pin 1 External Clock on Amiga video port
Post by: save2600 on October 12, 2019, 01:54:34 PM

In restoring an Amiga 1000 motherboard, I noticed pin 1 (XCLK external clock) is broken off. Wondering how important it really is before I look into replacing the port. Maybe it's only used with external TBC's?

Title: Re: Pin 1 External Clock on Amiga video port
Post by: paul1981 on October 14, 2019, 07:02:12 PM

I don't think you can call it 'restored' until you fix the broken parts.  ;)

Title: Re: Pin 1 External Clock on Amiga video port
Post by: AndyFC on October 15, 2019, 01:20:17 AM

The most useful info I could find about pin 1 is in this thread. In summary it looks like a way of using an external source to change the Amiga clock signal frequency; it affects the entire system but results in a change in Video signal frequency.

http://eab.abime.net/showthread.php?t=78339

Are you planning on using a Genlock or switching between PAL and NTSC? Consider if you NEED this at the moment instead of taking a risk on the repair.