Apple Macintosh Wiring

It is possible to connect the 801G* to a serial port on a Macintosh computer. Apple uses two types of serial connectors on its Macintosh series.

The Mac Plus, SE and II have an 8 pin female mini-DIN connector.

The Mac 128, 512 and 512E have a 9 pin fe- male D-Sub connector.

The table and figure below show how to make the proper connections between the 801G* and a Mac computer using either type of connector.

 

 

 

 

 

Table 5-7

 

801GX

Macintosh

Macintosh

 

 

9-pin D-Sub

8-pin DIN

9-pin D-Sub

 

Macintosh Serial

 

Connector

Connector

Connector

 

 

 

Connections

 

 

 

 

 

 

pin 1 NC

 

 

 

 

 

pin-2 Rx

pin-3 TXD-

pin-5 TXD-

 

 

 

 

 

 

 

 

 

pin-3 Tx

pin-5 RXD-

pin-9 RXD-

 

 

 

 

 

 

 

 

 

pin-4 DTR

 

 

 

 

 

 

 

 

 

 

 

pin-5 GND

pin-4 GND and

pin-3 GND and

 

 

pin-8 RXD+

pin-8 RXD+

 

 

 

 

 

 

 

pin-6 NC

 

 

 

 

 

 

 

 

 

 

 

pin-7 RTS

pin-2 HSKi

pin-7 HSKi

 

 

 

 

 

 

 

 

 

pin-8 CTS

pin-1 HSKo

pin-6 +12V

 

 

 

 

 

 

 

 

 

pin-9 NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 5-7

8 pin Female Mini-Din

Pin Numbering

Communication with the 801G* is via RS-232C protocol using factory deafult settings of 2400 baud, 8 data bits, 1 stop bit, no parity, no handshake, full duplex.

The current firmware allows you to increase the baud rate beyond 2400 using a RTS/CTS handshake. We therefore recommend that you wire the RTS and CTS signals if you plan to operate the serial port at faster than 2400 baud*.

5-12

Chapter 5: Making Connections

Model 801GC, 801GF & 801GX¥Rev. A

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Quantum Data 801GC, 801GF, 801GX manual Apple Macintosh Wiring, Connections