I have one of the older series 2950DX's,in other words one of the first series of the new 2950DX's and it had the E-chip. It could also be expanded by jumpering the terminals on the back of the display board just like the old black face orange display 2950's. I was told that I should still use the E-chip however but no reason was ever given as to why.
Thanks QRN; Wish I could see what the E-chip looked like. I think I would rather start with getting one to try out first before jumping terminals with homemade pins. Board has a green round sticker on it with 2950DX hand writen with ink pen. Would you happen to know the part number?