Digital Equipment RapidPrint 500, Справочное руководство

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AppleTalk Host Setup Bitronics Interface
6 - 1
6 - AppleTalk Host Setup
AppleTalk configuration is extremely simple for Macintoshes that support EtherTalk. Macintoshes
that do not support EtherTalk will need either an Ethernet interface or an EtherTalk-to-LocalTalk
router to use the RapidPrint 500.
If a router is used, it will provide an EtherTalk zone on the Ethernet network, and the RapidPrint
500 devices will appear under that zone (see
Macintosh Service Configuration , below). The Rapid-
Print 500 service name(s) should be visible and usable like any other LocalTalk device.
The RapidPrint 500 advertises its attached printers as LaserWriters. The RapidPrint 500 and its
printers can be assigned to a specific zone with the
Define Protocols AppleTalk command.
Figure 6-1: Specifying a New AppleTalk Zone for the Printer
Since printers attached to the RapidPrint 500 aren’t directly connected to the network, any pro-
grams or utilities that attempt to modify their AppleTalk settings will fail. The RapidPrint 500 con-
trols all AppleTalk parameters, such as zone name and job time-outs, so modifying these settings
on the printer itself will have no effect.
6.1 Bitronics Interface
Printing from a Macintosh requires bidirectional PostScript data flow. For that reason, the Rapid-
Print 500 supports the Bitronics interface created by Hewlett-Packard (IEEE 1284 nibble mode).
This interface is an extension to the standard Centronics interface. Printers that support Bitronics
(such as the DECLaser 3500) allow bidirectional communication via the parallel port. To enable
Bitronics on the RapidPrint 500 parallel port, use the following commands:
Figure 6-2: Enabling Bitronics Mode
If the PostScript printer attached to the RapidPrint 500 can not provide interactive responses to the
printing host, AppleTalk printing will fail. Macintoshes typically require responses to PostScript
queries sent to the printer.
NOTE: The printer must support Bitronics and the Bitronics mode must be enabled on the
printer.
Local>> DEFINE PROTOCOLS APPLETALK ZONE “Accounting”
Local>> DEFINE PORT BITRONICS ENABLED
Local>> LOGOUT PORT 1