bloke,
I recorded the number on the EPROMs and see that the chip in U75 plug has a small 1175 on the bottom of the sticker. Like wise the chip in U76 plug has a small 1176 on the bottom of the sticker. I am not sure if the larger 002-3434-075 on each chip indicates it is a U75 EPROM or the smaller number is correct. Dang, just had a brain fart. The small numbers are at the bottom of the 2 tags. Could the 11xx be Uxx?
If so I am back to changing out the MC1488 and MC1489 on the CPU board. The iron has been hot. Already did the CRT board up at the key board. Better put DIP plugs in for easy changing.

U76
KM3 V8.60
002-3434-075
99C86C ENG/S
1176 07/22/92

U75
KM3 V8.60
002-3434-075
99BB31 ENG/S
1175 07/22/92

U74
002-3434-009 CS 09A9
HURCO 8.60-U74

U73
002-3434-009 CS C054
HURCO 8.60-U73

U72
002-3434-009 CS 40E7
HURCO 8.60-U72

U71
002-3434-009 CS 4A10
HURCO 8.60-U71

U70
002-3434-009 CS C470
HURCO 8.60-U70

U69
002-3434-009 CS B887
HURCO 8.60-U69

U68
002-3434-009 CS 8FFE
HURCO 8.60-U68

U67
002-3434-009 CS 5998
HURCO 8.60-U67

U66
002-3434-009 CS 904E
HURCO 8.60-U66

U65
002-3434-009 CS 704C
HURCO 8.60-U65

Thank you
kc8jyr