The control-pad for other machines

SNES

Pin assign

(counting from arc edge)
#  name              description
---------------------------------------
1. GND
2. ?
3. ?
4. DATA              data(i)
5. P/S               shift/load signal(o)
6. CLOCK             shift clock(o)
7. Vcc(5V)

communication format

this is serial communication with syncronous clock. to transmit, good for use two MC14021.

SNES's data table (shift direction:right, PushDown = Lo)
+------------+-----+----+----+----+----+----+----+----+
|DataPosition|  A  |  B |  C |  D |  E |  F |  G |  H |
+============+=====+====+====+====+====+====+====+====+
|First       |Right|Left|Down| Up |Sta |Sel |  Y |  B |
+------------+-----+----+----+----+----+----+----+----+
|Second      |  1  |  1 |  1 |  1 |  R |  L |  X |  A |
+------------+-----+----+----+----+----+----+----+----+

NES's data table(one MC14021)
+------------+-----+----+----+----+----+----+----+----+
|DataPosition|  A  |  B |  C |  D |  E |  F |  G |  H |
+============+=====+====+====+====+====+====+====+====+
|First       |Right|Left|Down| Up |Sta |Sel |  A |  B |
+------------+-----+----+----+----+----+----+----+----+

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Sega MegaDrive

Pin assign(D-SUB9P)

#  Name        Description
---------------------------------------
1. Up          PushDown = Lo
2. Down 
3. Left(Lo)    page controled by signal of DS.
4. Right(Lo)
5. Vcc(5V)
6. B(A)
7. DS          '0' means select in '()'.
8. GND
9. C(Sta) 

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NEC PC-ENGINE

Pin assign(Mini DIN 8P)

#  name        Description
---------------------------------------
1. Vcc +5V
2. Up(B)       PushDown = Lo
3. Right(A)    page controled by signal of DS.
4. Down(Sel)
5. Left(Sta)
6. B(A)
6. DS          '0' means select in '()'
8. GND

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