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'Ghost' Key Presses
Klomper:
My thoughts were the wires as well and I did some additional testing last night.
Did not work:
1. CP has two sets of buttons 1 & 2 at 8way and 4 way stick and it happened using either set. Both sets are wired on a set of twisted pair.
2. Thought I may have nicked the wires when removing the jackets. Looked OK but added some electrical tape at the point to be sure.
3. Removed the quick disconnect from both button 2
4. Removed 4way b1/b2 wires from IPAC
Works but not the 'real' fix:
Mapped 'l-ctrl' to 1sw7 input on the ipac and 'c' to sw1 input since b7 is not used. Was able to complete 2 games of 1942 without false loops. (these buttons are wired on the same cable but different twisted pairs)
Another note in IPAC test mode l-ctrl sometimes registers as r-ctrl? In fact when I switched the mapping and pressed l-ctrl on my keyboard it registered as r-ctrl the first time.
Beretta:
i'd be SHOCKED if it's the ethernet.
wire normally used in ethernet is cat5+, very good quality wire.
in some cases people transmit power to power remote devices using PoE (power over ethernet) which calls for 48 volts.
the arcades controls calls for MUCH less then that usually around 5 volts or less, and like someone said almost no amp's
if i had to guess i'd say it's a wiring mistake.. or possibly a stray strand of wire.. you know need a tiny strand of wire to be on the loose.. htis is a problem when soldering also a single strand you missed creating a short.
i'd also check mame "input" settings... is it at all possible somehow mame's button configuration is off? you said you did not notice it in tmnt or nba jam