32X 50/60Hz automatic slave switch
Copyright (C) 2012 by Maximilian Rehkopf (ikari_01) [email protected] Idea by n00b
This program is designed to run on a PIC12F629 or compatible micro controller. It determines the frequency of the VSync signal on pin 5 and switches the output level of pin 6 accordingly (50Hz = 0V; 60Hz = 5V).
This program is released to the public domain; it is the wish of the author that the original attributions stated above remain unchanged.
pin configuration:
,---_---.
+5V |1 8| GND
nc |2 7| nc
nc |3 6| 50/60Hz switch out
nc |4 5| Vsync in (TTL)
`-------'
Vsync can be taken from cartridge slot pin B13 or CN4 pin 15. No sync separator required.