OK, best I can tell is leds 80, 805 and 111 are associated with feedhold. Put those leds on a screen and lable them thier respective number 80,805,111 and see which one/s turn and turn off when you want your hardware light to blink/stop blinking.
Watch it/those in a brain..... and blink your hardware light based on it/those.
You cant change what the 1001 code does. You may be able to use it in script and add functrions in that script but last I played with it, it was pretty feniky. Would prefer doing the feed hold as a function and monitor those leds. I think 805 will be the one but not certain.
Brett