Apple 310 manual Communication Ports, Serial Port for RS-232C Devices

C H A P T E R 1

LaserWriter Select 310 Hardware

Communication Ports 1

The LaserWriter Select 310 printer supports two communication ports:

■RS-232 8-pin serial port

■Centronics 36-pin parallel port

Figure 1-1 shows the relative positions of these ports on the rear panel of the printer.

Figure 1-1LaserWriter Select 310 printer side panel connectors

SIMM card slot	Centronics 36-pin port	RS-232 8-pin
		serial port

When the LaserWriter Select 310 printer is first powered on, the serial port with binary protocol enabled is the default communication port. If any character is received over the Centronics parallel port, the parallel port with binary protocol and a serial back channel automatically becomes the default port. If you want to change the communication port back to serial mode after a job has been sent over the parallel port, you should power down and then restart the printer. Similarly, if you wish to change printer drivers, you should power down and then restart.

IMPORTANT

It is better to operate the LaserWriter Select 310 printer in either a serial or a parallel communication environment than to transmit both

serial and parallel data. Attempting to operate in both environments may cause unpredictable results. ▲

Serial Port for RS-232C Devices 1

The LaserWriter Select 310 printer supports the RS-232 protocol by means of an 8-pin mini-DIN connector. This connector provides the interface between the printer and Apple Macintosh computers. Figure 1-2 shows the connector pin designations and

Table 1-2 lists the pin functions for this 8-pin connector. You can also connect the printer directly to a Macintosh computer using a Peripheral-8 (M0197) cable and communicate with the printer using the LaserWriter Select 310 printer driver, or a terminal emulation program such as MacTerminal.

4 Communication Ports