All, A buddy on twitter is trying to find out info on the following NT ICs. Info here: "Northern Telecom QMV271BY1 / NTOOR66C3A : Unknown device. Ceramic Pin Grid Array package with gold cap. Manufactured Week 33 of 1990. No further information known." https://twitter.com/Neko_Ed/status/1029034885573500929 Any ideas to help him? -- -Jon +44 7792 149029