Lab 03 – JUMP & Decoder

1. 4/16 Bit Decoder

   1. Thank you 3/8 bit decoder. This was really straightforward to build.

   2. I have a continuing problem with the decoder: When an undefined program line is entered, the whole unit enters an undefined state and from there everything starts producing X's. I suppose this is not entirely unexpected, but it would be nice for it to be able to recover or be aware of unused ROM/RAM and avoid reading from it.

2. JUMP here is the basic program I have working with the JMP command.

1. ffff

2. fffe

3. fffd

4. fffc

5. fffb

6. fffa

7. fff9

8. fff8

9. fff7

10. fff6

11. fff5

12. fff4

13. fff3

14. fff2

15. fff1

16. fff0

17. 0000

18. faa0

19. faa1

20. faa2

21. faa3

22. a01d

23. faa4

24. faa5

25. faa6

26. faa7

27. faa8

28. faa9

29. a023

30. faaa

31. faab

32. faac

33. faad

34. faae

35. a016

36. faaf

37. a000

Here is a link to my JMP coded PROM enabled skeletal CPU: Download