On Wed, 2 Dec 1998 11:47:48 -0800 , Clay Cowgill < > wrote:
>> I sent mail out to the pic list and got feedback that yea its doable
>> but not
>> simple. But I did get one piece of mail suggesting I look a the
>> Lattice
>> Semi. ispGDX / ispGDS parts, these are programmable Generic Digital
>> Crosspoint devices specifically designed for signal routing.
>> http://www.latticesemi.com/prodinfo/ispgds.html
>>
>Hmmmm. I'd still say a 40 pin PIC or Atmel AVR would be
>better/easier/faster to do. Lattice is always expensive... But, that
>having been said...
I'd have to agree. If it's lack of I/O you're concerned with, check out this
appnote, this guy manages to scan 21 keys using only 4 I/O lines...(and a few
diodes):
http://www.microchip.com/0/Appnote/Category/12CXXX/Logic/4_012/index.htm
That leaves a lot of left over lines to masquerade as inputs to the game board.
(BTW: Don't believe everything you read on the PicList, that is one "noisy"
mailing list! I wonder if you can setup a listserver command to automatically
unsubscribe anybody who answers a message with "me too!"...)
-Zonn
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