The RTC connections:
D0/D7 to data bus
/CS0 to standard CS/ from 74138
the CS1 to pin 5 of TTL7705, when the
power is below 4,5 volts, it go "0".
RD/ and WR/ to connect to standard pin
The battery it's the standard system
whirh diode and capacitors needs, it's are in use in to others chip, and it's correct.
the AL it's connect to VCC.
until te power is on anything it's correct, when I switch off power, some times the clock are changed
regards and thanks
Maurizio