Following specifications The system has a 16bit address bus

Following specifications. The system has a 16-bit address bus, data bus, and READ and WRITE control signals. ROM starting at address constructed using 8K. times 4 chips of RAM starting at address 8000H constructed using 4K. times 8 chips n input port with no READY signal at memory-mapped address

Solution

For system it is 16 bit address bus so address lines are denoted as A0-A15.

since we need to interface 16Kx8 ROM the memory we required is 3FFFH because 16K=2¹⁴  

that means 14 address lines A0-A13. So starting memory for ROM is 0000H and ending memory is 03FFH.Similarly with RAM it requries 1FFFH memory block because 8K=2¹³ that means 13 address lines A0-A12.Since we need to start from 8000H,starting address is 8000H-9FFFH.we need a 8 x 1 decoder to select RAM/ROM.A15 and A13 lines are given to decoder to select the between ROM /RAM.we need to select odd /even address bank.

^A15

A0

ROM memory block are given only READ and RAM memory are provided with both READ and WRITE active low control signals

ADDRESS LINES	A15	A14	A13	A12	A11	A10	A9	A8	A7	A6	A5	A4	A3	A2	A1	A0
ROM starting addr	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
ROM ending addr	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1
RAM starting addr	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
RAM ending addr	1	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1