> Well, I think Zonn's on the right track. I'd look at
> something like the
> Atmel AT90S4414 uController and read the inputs as a matrix. The 4414
> has 32 lines of IO, built-in flash and SRAM, etc. Use one
> port to scan
> your "inputs" as a switch matrix, and then use 20 dedicated
> output lines
> for you parallel presentation to the game interface. The AVR (Atmel)
> ports will sink 20mA each. (Not like a PC keyboard uses 105 lines of
> I/O. I bet you there's a PIC appnote somewhere that shows
> how to read a
> switch matrix with just a few IO lines...)
>
> The Atmel development kit with a circuitboard/programmer and software
> (assembler, programmer, simulator) is only $49. At the AT90S4414 in
> singles is only about $6.75 (sub $5 in 100's from distribution). And
> you can just program it in assembly, or IAR has a demo
> version of their
> C compiler you can use for free for up to 256 bytes of object code (or
> something like that)...
Where did you see this kit for $49? I have looked around and havn't found
it yet.
And who is IAR? I prefer C if at all possible.
David
Received on Wed Jan 13 16:36:37 1999
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