Caple C871i Manual do Utilizador descarregar pdf (Página 456)

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Apple II Computer Info

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### FILE : soundin

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### Created : Friday, September 27, 1996 Modified: Friday, September 27, 1996

### File Type: "TEXT" File Creator: "LMAN"

### File Size: 2085 bytes 2 KB

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Re: Sound Input on IIGS

From: [email protected] (David Empson)

Reply to: David Empson

Date: Tue, 06 Aug 1996 01:02:22 +1200

Organization: Empsoft

Newsgroups:

comp.sys.apple2

Followup to: newsgroup(s)

References:

<[email protected]>

In article <[email protected]>, [email protected]

(Tilghman Lesher) wrote:

>Mitchell Spector ([email protected]) wrote:

>: In article [email protected] (John Lesher) writes...

>: >

>: > How can I get the IIGS to sample sound? When I had

>: >my //e, I had this nifty little program to sample sound via

>: >the cassette port, but the IIGS has no cassette port. Is

>: >there a simple method? Or must I buy a peripheral card?

>[snip]

>: As I mention above, sound sampling is built-in to the chip (ADC),

>: but Apple didn't add any conventional way to plug in your sound source.

>: They did however provide a set of molex I/O pins. You basically have

>[snip]

>Where on the motherboard are these pins and (if > 2) what are the

>pinouts?

It is the 7-pin molex connector in the lower right corner of the

motherboard, next to the Ensoniq. All stereo cards plug into this

connector.

Most of the pins are used for sound output and associated demultiplexing.

Pin 1 is the sound input and pin 2 is analog ground. (Pin 1 is the one

closest to the back of the computer, right next to the legend "J25" on the

ROM 1 motherboard.)

The sound input expects a signal which has a maximum range of 2.5V peak to

peak. The input impedance is 3000 ohms.

I'm not all that clear on audio impedances and voltages, so I'm not sure

Apple II Computer Technical Information : Apple II Family Hardware Info

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