Caple C871i Manual do Utilizador descarregar pdf (Página 66)

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Apple II Computer Info

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

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

### File Size: 1827 bytes 1 KB

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Path: news.uiowa.edu!news.physics.uiowa.edu!math.ohio-

state.edu!howland.reston.ans.net!news.starnet.net!waikato!comp.vuw.ac.nz!asgard.ac

trix.gen.nz!atlantis.actrix.gen.nz!not-for-mail

From: [email protected] (David Empson)

Newsgroups: comp.sys.apple2.comm

Subject: Re: CCS 7710 info??

Date: 17 Apr 1996 01:13:00 +1200

Organization: Actrix - Internet Services

Lines: 30

Message-ID: <[email protected]>

References: <[email protected]>

NNTP-Posting-Host: atlantis.actrix.gen.nz

Keywords: apple2 help serial

In article <[email protected]>,

Charlie Reiman <[email protected]> wrote:

> I have a CCS 7710 serial card that I purchased to hook up my brand

> spankin' used Apple IIe to my 'real' computers.

You bought a CCS 7710 (it should have an "A" on the end)? How

recently? It is a rather old serial card (1980 according to the

manual I have here, so it predates the Apple Super Serial Card). It

is not supported by much software that I know about, because it is not

compatible with the Apple SSC (which is the most common type of serial

card).

> I'm only able to get serial output from my Apple2. I cannot send

> anything into the machine.

The CCS 7710A uses a Motorola 6850 ACIA chip. This chip requires that

certain flow control signals be active in order to allow it to

transmit and/or receive. The DCD input must be active to receive

anything. The CCS 7710A's serial connector is wired as a DCE, so it

redirects the RTS input (pin 4) to the DCD pin of the chip.

You must therefore have RTS connected to an active flow control signal

to be able to receive anything.

(It also uses DTR, pin 20, rerouted to the CTS pin of the 6850, to

allow the card to transmit.)

David Empson

[email protected]

Snail mail: P.O. Box 27-103, Wellington, New Zealand

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Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 66 of 572

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Caple C871i Manual do Utilizador Página 66

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