Question 2
An 8086 system is to use two 32K x 8-bit RAM chips for read/write memory, starting at location $80000.
The RAM chip has inputs OE/ WE/ & CE/ .
Obtain the memory map assuming there are no other memory chips in the system.
Design the address decoding logic and show how to connect the RAM chip to the
µP.
Answer the following questions:
i What is the address range for the RAM in Hex?
ii How many address pins does the RAM have?
iii How many data pins does the RAM have?
iv Which RAM address pins connect to which
µP address bus lines? How?
v To what do the RAM data pins connect?
vi Which RAM input pin needs to be asserted to enable the chip? Does it need a 1 or a 0?
vii Design the address decoding logic
Show the way the RAM chip is connected to the
µP and obtain the resulting memory map assuming there
are no other memory chips.
