keyboard hack questions

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Posted by dan on 13, 2001 at 10:44 PM:

I now read all I can find on keyboard ghosting and how to prevent it, but still have a number of questions:

1) various sites mention that a keyboard IC usually has 8 'y' and 13 'x', or 12 and 12, etc. How can I determine how many mine has - mine has a big chip on the top with various electronically diodes (I think), and then tons of green lines on the back side with pins on the ends of each green line.

2) I plan on geting diodes to prevent ghosting; will this also allow multiple keys to be pressed and the IC recognizing them? I plan on a 4 player with 6 buttons each, plus 6 MAME keys, for a total of 46 keys.

thanks

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Re: keyboard hack questions Tiger-Heli 6/14/2001 (0)
Re: keyboard hack questions Just Michael 6/13/2001 (0)

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: : I now read all I can find on keyboard ghosting and how to prevent it, but still have a number of questions: : 1) various sites mention that a keyboard IC usually has 8 'y' and 13 'x', or 12 and 12, etc. How can I determine how many mine has - mine has a big chip on the top with various electronically diodes (I think), and then tons of green lines on the back side with pins on the ends of each green line. : 2) I plan on geting diodes to prevent ghosting; will this also allow multiple keys to be pressed and the IC recognizing them? I plan on a 4 player with 6 buttons each, plus 6 MAME keys, for a total of 46 keys. : thanks

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