In article <385751B6.95239462@fz-juelich.de>, Patrick.Schaefer@topmail.de wrote: > Saturn has 128kB (2 rows of 4164). Neptune may have 32k. > > Check the voltages at the edges of the sockets. 4164 and 41256 use 5V > only (unlike 74 TTL pin 8 is +, pin 16 -). If +12V, -5V are present, the > sockets are for 16kbit 4116 RAMS. > > > Patrick Thank you for the information. Mike Mc