Question $2$

$[10]$

a$)$ Which one of the following memory organisations is impossible? Explain why the others are possible.

$(1)10-$bit address, $1024$ cells, $8-$bit cell.size

$(2)10-$bit address, $1024$ cells, $12-$bit cell size

$(3)9-$bit address, $1024$ cells, $10-$bit cell size $-$

$(4)11-$bit address, $10$ cells, $10-$bit cell size $.$

A $9-$bit addicss con only access $512$

cells

$(5)10-$bit address, $1024$ cells, $1024-$bit cell size $2^9=512$