At 07:22 PM 8/5/01 +0100, you wrote:
>Mountain Hardware Supertalker. Some kind of voice I/O card. There are 2
>3.5mm jhackl sockets (what you'd call mini phone jacks :-)) on it, one
>labelled 'microphone input', the other 'speaker output'. It contains a
>couple of 324 quad op-amps, an LM380 audio amplifier, a small-ish PROM
>(256 bytes, I think), TTL and 4000 series CMOS logic, and a MC3418 (is
>that some kind of Codec?)
MC3418 is a "Continuously variable slope Delta Modulator / demodulator"
"Providing a simplified approach to digital speech encoding / decoding ..."
http://www.spies.com/arcade/schematics/DataSheets/MC3418.pdf
there's the PDF of the datasheet for it.
and here's a URL for a bunch of datasheets on common IC's used in arcade
machines...
http://www.spies.com/arcade/schematics/
Received on Sun Aug 05 2001 - 21:07:26 BST