Nintendo / Playstation "SuperDisc" Prototype.

Possible preliminary pinouts for MCU (IC203).
Based only on the few available photos of the motherboard.

(OzOnE 2015).


1.  Exp Addr?
2.  Exp Addr?
3.  Exp Addr?
4.  Exp Addr?
5.  Exp Addr?
6.  ? Possible power, clock, or unused pin?
7.  Exp Addr?
8.  Exp Addr?
9.  Exp Addr?
10. Exp Addr?
11. Exp Addr?
12. ? Possible power, clock, or unused pin?
13. ? Possible power, clock, or unused pin?
14. ? Possible power, clock, or unused pin?
15. ? Possible power, clock, or unused pin?
16. Connected to pin 38 with bodge wire? - from the original "DIR" signal for buffer IC205?
17. ? Possible power, clock, or unused pin?
18. ? Possible power, clock, or unused pin?
19. Possibly /RESET (has a 10K pull-up, or pull-down).
20. White "bodge" wire connects to pin 1 "bodged" buffer chip IC205 (ie. the DIRection input)?
21. ? Possibly "nc"?
22. ? Possibly "nc"?
23. ? Possibly "nc"?
24. ? Possibly "nc"?
25. Via? To LCD display board?
26. Via? To LCD display board?
27. Via? To LCD display board?
28. Via? To LCD display board?
29. Via? To LCD display board?
30. Via? To LCD display board?
31. ? Possible power, clock, or unused pin?
32. Via? To LCD display board?
33. Track
34. Track
35. Track
36. Track (Possible /PAWR signal?)
37. Track (Possible /PARD signal?)
38. Track / and to pin 16 via bodge wire? Original "DIRection" signal for buffer IC205?
39. CPU D7 ? (from buffer IC205)
40. CPU D6 ? (from buffer IC205)
41. CPU D5 ? (from buffer IC205)
42. ? Possible power, clock, or unused pin?
43. ? Possible power, clock, or unused pin?
44. CPU D4 ? (from buffer IC205)
45. CPU D3 ? (from buffer IC205)
46. CPU D2 ? (from buffer IC205)
47. CPU D1 ? (from buffer IC205)
48. CPU D0 ? (from buffer IC205)