block diagram showin 74LS138 being used with Z80

[benbag2005]

i have i slight problem, and its got me stumpe
i need to produce a block diagram for a simple mircoprocessor system
showing how a 74LS138 logic device could be used as part of th
address decoding, if 4 * 1 Kbyte memory devices are to be used with
Z80 CP

normally i dont like asking but this i just cant figure out or find o
the net
any help would be apprecaite
thanks for your hel

 

[Andrew Holme]

i have i slight problem, and its got me stumped
i need to produce a block diagram for a simple mircoprocessor system,
showing how a 74LS138 logic device could be used as part of the
address decoding, if 4 * 1 Kbyte memory devices are to be used with a
Z80 CPU

normally i dont like asking but this i just cant figure out or find on
the net.

http://www.google.co.uk/search?hl=en&q=address+decoding+74ls138