1 The 68HC11 can address 512K bits of information Your compa

1. The 68HC11 can address 512K bits of information. Your company is considering developing the next generation micro the 68HC12 which will use 1024K bits. What changes to the address and/or data lines are required?

2.What is the maximum number of bytes required for an instruction which uses inherent addressing?

3.When the microprocessor receives an interrupt, where does the interrupt vector, which has been stored in the interrupt table, get loaded?

4.why do commands using extended addressing require 3 bytes of memory?

5. Do you use the stack when jumping to an address, a subroutine, an interrupt subroutine, some combination of these, none of these?

6. What happens when you MASK an interrupt?

7. What is the contents of accumulat A after the following 3 commands:

LDAA #$80

ABA

LDAB $80

8. convert C716 to binary.

COMPUTER ARCHTIECTURE

Solution

2)

they vary in length from one to five bytes.So,maximum size is five bytes.

5)

Yes,while using subroutines we have to use stack as stack pointers.

6)When we mask an interrupt,it disables the detection of interrupt line assertion,that leads to OS to ignore interrupt signal.The signal is ignored at the microprocessor or other hardware level

8)

1010 0111 0001 0110