Quote Originally Posted by IanS1 View Post
Is it some sort of I/O board? The Dallas Speed chip seems to point in that direction.

http://www.keil.com/dd/chip/2975.htm

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And it looks like the ribbon cable from it goes to the controller board
Thanks Ian that's what I thought it might be but it's not an issue now after speaking with Carl I think he's going for a full retrofit except spindle controller.