Question: 1. When designing an address decoder, a block of memory should be mapped onto a boundary equal to its own size. Why?
2. Can you think of any way of overcoming the restriction that a block of memory should be mapped onto a boundary equal to its own size?
3. A region of up to 512 Kbytes of the 68000 memory space, whose lowest address is $80 0000, is to be devoted solely to the 68000 supervisor stack, Design an address decoder to implement this arrangement (using 128K x 8 static RAMs). You are to make maximum use of the 68000 function code outputs in this address decoder.