Caple C871i Manual do Utilizador descarregar pdf (Página 467)

100

101

Apple II Computer Info

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The plug on the card can be in either of two configurations. If you

look near the back of the card, you will see a large black block with

an arrow on it, and the words MODEM above and TERMINAL below it.

The arrow will be pointing to either of these words. You can remove

the block (it is socketed) and reverse it.

With the arrow pointing to TERMINAL, the card is configured to plug

directly into a terminal or printer with a straight-through serial

cable. With the arrow pointing to MODEM, the card is configured to

plug directly into a modem with a straight-through serial cable.

In the MODEM position, the connector is wired as a DTE. It uses the

following pins:

1 Frame Ground

2 Transmit Data

3 Receive Data

4 RTS

5 CTS

6 DSR

7 Signal Ground

8 DCD

20 DTR

In the TERMINAL position, the connector is wired as a DCE. It uses the

following pins:

1 Frame Ground

2 Receive Data

3 Transmit Data

4 (incoming flow control, goes to DCD input of 6551 if switch enabled)

5 (looped back from pin 4)

6 (outgoing flow control, comes from DTR output of 6551)

7 Signal Ground

8 (outgoing flow control, comes from RTS output of 6551, also goes to

CTS input of 6551)

20 (incoming flow control, goes to DSR input of 6551)

A switch can also be used to connect the SCTS pin (19) to the DCD

input of the 6551, instead of the RTS/CTS pins.

Here are the switch settings.

Switch SW1-1 through 1-4: Set the default bit rate

1-1 1-2 1-3 1-4 Default bit rate

ON ON ON ON undefined

ON ON ON OFF 50

ON ON OFF ON 75

ON ON OFF OFF 109.92 (110)

ON OFF ON ON 134.48 (134.5)

ON OFF ON OFF 150

ON OFF OFF ON 300

ON OFF OFF OFF 600

OFF ON ON ON 1200

OFF ON ON OFF 1800

OFF ON OFF ON 2400

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 467 of 572

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