Friends, google has not been kind to me. Looking for the datasheet on the 5380 chip used in my PDP-8/e in the M8650 TTY board..
Run my reply past David Gesswein. But the 5380 on the M8650 schematic, looks a lot like Signetics SP380, down to the pinouts. (don't be confused by OR vs AND, use Boolean logic). you can get SP380's on eBay for several dollars. Or ask some PDP-8 owners. There's also some notes on this page: http://tronola.com/html/ram_for_pdp-8e.html which suggest the DEC S380 is your "5380". Also look at some DEC handbooks about the Omnibus. And of course, stare at your board, see the brand and number on the chips versus names in the schematic. DEC is your friend here, Google merely introduced you to them. ;) Herb Johnson stumbler with 8's -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info