16 Dec
2016
16 Dec
'16
6:19 p.m.
They aren't 'standard' 14-pin DIPs in that they don't follow the
GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together
(not to GND) and form the RESET signal for the 8085 via the 7414 at 10A,
source for this signal is unknown currently. Pin 5 on both appears to be Vcc
and pin 10 is GND or at least are pulled high and low respectively.
Could they be 74(LS)90? Those have Vcc on pin 5 and GND on pin 10.
Regards,
Peter Coghlan.