Hi people ! four questions :
1-I had a basic 8052 system working with a EPROM,a RAM, a RTClock and a NVRAM on the bus.
After I include the NVRAM,the basic is corrupting the data and the programs
I have on the EPROM does not run anymore. Would am I putting too much
things on the circuit so the MCU cannot drive the bus? In wich cases
the MCU corrupt data reading from a memory? How many memories I can put on the MCU bus?

2- My System requires a RAM from 0000h for running Basic programs (I put 8k), a EPROM
for the firmware (8k from 8000h) and a NVRAM for keep safe the data from outside (8k) besides a RTCLOCK.
Is that any other to arrange those memories in a better or cheaper way?

Lots of fun for all