Conversion from Scramble to Karateco Super Cobra
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(notes by Paul Swan)

Whether this version of Super Cobra is licensed or a pirate I don't know. I also don't know whether there has been any software changes to accomodate the Scramble board rather than the original Super Cobra board.


Sound Board
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Lift/Cut pin of 1C (LS00) pin 8.
Lift/Cut pin of 1C (LS00) pin 6.
Add link 1C (LS00) PAD 8 -> 1C (LS00) pin 9.
Add link 1C (LS00) PAD 6 -> 1C (LS00) pin 10.
Add link 3D (AY-3-8910) pin 8 -> 3D (AY-3-8910) pin 10. (?)

Video Board
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4 2716 EPROMS have been piggy backed onto 2J, 2L, 2M & 2P. All the signals connect through except pin 20. The ROM image files are appendixed as follows:-

_U = Upper piggy back ROM.
_L = Lower (normal) ROM.

2J_U (2716) pin 20 -> 3F (LS138) pin 15.
2L_U (2716) pin 20 -> 3F (LS138) pin 14.
2M_U (2716) pin 20 -> 3F (LS138) pin 13.
2P_U (2716) pin 20 -> 3F (LS138) pin 12.

The following track cuts are required:-
 Cut trace RIBBON (conn) pin 3 (Bottom).
 Cut trace RIBBON (conn) pin 5 (Bottom).
 Cut trace 4B (LS139) pin 5 (Bottom).
 Cut trace 3D (LS138) pin 4 (Top).
 Cut trace 4F (LS32)  pin 1 (Bottom).

Add link 3B (LS138) pin 15 -> 4F (LS32)  pin 13.
Add link 4B (LS139) pin  5 -> 3F (LS138) pin 4.
Add link 4B (LS139) pin  6 -> 3B (LS138) pin 4.
Add link 3B (LS138) pin 12 -> RIBBON (conn) pin 3.
Add link 3B (LS138) pin 11 -> RIBBON (conn) pin 5.

