INTV-1 MODIFICATION TO SUPPORT SYSTEM CHANGER:
Blue Sky Rangers System Changer
Note: I don't like intv-1s because they don't seem to last very long, and
recommend getting an intv2 instead
INTV-2 QUICK TURNOFF:
Deathskull Labs
This one is easy
GENESIS CONTROLLER ADAPTER:
Deathskull Labs (again!)
This most of the library more fun to play. I built this into my
own intv, the only change I made was to give all the direction lines blocking
diodes and pullup resistors (like the fire buttons) so the disc would keep its
sixteen direction behavior.
If you're going to do the genesis adapter with 74266 ICs, be careful because the GICCM webpage has the wrong pinout, the correct one is listed below. The guy still hasn't corrected it after two emails.
74266
Quad 2-input open-collector XNOR gates.
+---+--+---+ +---+---*---+ _ _ _
1A |1 +--+ 14| VCC | A | B |/Y | Y = A$B = (A.B)+(A.B)
1B |2 13| 4B +===+===*===+
/1Y |3 74 12| 4A | 0 | 0 | Z |
/2Y |4 266 11| /4Y | 0 | 1 | 0 |
2A |5 10| /3Y | 1 | 0 | 0 |
2B |6 9| 3B | 1 | 1 | Z |
GND |7 8| 3A +---+---*---+
+----------+