[GreenKeys] Teletype IC part numbers

[Jeffrey Golas]

Slightly OT as this has to do with the At&t/Teletype 513 terminal I was playing with and not a mechanical machine.

I noticed every IC on the motherboard has a 6 digital Teletype-looking part number to it. 

In some cases on the ICs also had a "SLO###" (zero or O) type number as well, usually for larger 40 pin ICS. In comparing to other boards that had non-obfuscated original markings, the board is basically a collection of z-80 family parts by Mostek, including the Mostek 3880 cpu which is really a z-80.

Im just curious if there were ever publications or lists of part numbers to original numbers?

Attaching a pic of an example, I believe thats the CPU. (Also notice the printing is upside down compared to pin 1). The numbers here are:

8429 (date code)
SLO227 - oem number??
404780 - Teletype part number

Again thats a z-80 cpu, likely Mostek but maybe another brand too.

Jeff KC3GJX
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