Motorola M68000 Betriebsanweisung PDF herunterladen (Seite 28)

14 Assembly Language Programming for the 68000 Family

20. Hexadecimal numbers use what number base?

21. What number base is used internally by the 68000?

22. Convert the following decimal numbers to binary and hexadecimal:

a) 200 b) 5 c) 65000

23. Convert the following unsigned binary numbers to decimal:

a) 11010101 b) 00001110 c) 11100000110

24. Convert the following unsigned hexadecimal numbers to decimal:

a) ABCD b) 123 c) FF

25. Convert the following hexadecimal numbers to binary:

a) FEAA b) 123A c) 0100

26. Convert the following binary numbers to hexadecimal:

a) 1100110001 b) 00010000 c)11110111

27. Perform the following signed binary additions:

a) 11111000 + 00111111

b) 00010001 + 01000000

c) 11111100 + 00000011

28. Perform the following signed binary subtractions:

a) 11100000 - 00000001

b) 00111000 - 11111111

c) 10101010-00010101

29. What is the range of the ASCII codes that are printable?

30. Does the 68000 interpret the ASCII character codes?

Answers

1. two

2. a) 226 b) 63 c) 128

3. a) 1111110 b) 11111111 c) 1100100

4. a) FF b) 10 c) C5

5. a) 01010101 b) 10101011 c) 11101110

6. a) 225 b) 85 c) 222

7. a) 111111 b) 101011

8. a) 1A0AA b) A711

9. a) 11010 b) 01001

10. a) 55555 b) OFFF

11. 8

12. 2

13. two’s complement

14. the high-order bit

15. one

16. 11000011

17. -16

18. 9C

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Motorola M68000 Betriebsanweisung Seite 28