Epson Stylus Color 980 Service Manual

EPSON Stylus Color 980 Revision A
Product Description Interface 28
1.3.7.1 IEEE 1284.4 Protocol
The packet protocol described by IEEE1284.4 standard allows a device
to carry on multiple exchanges or conversations which contain data
and/or control information with another device at the same time across
a single point-to-point link. The protocol is not, however, a device
control language. It does provide basic transport-level flow control and
multiplexing services. The multiplexed logical channels are independent
of each other and blocking of one has no effect on the others. The
protocol operates over IEEE1284.

Automatic selection:
An initial state is compatible interface and starts IEEE1284.4
communication when magic strings (1284.4 synchronous
commands) are received.

ON:
IEEE1284.4 is enabled as initial state. Data sent before the magic
string (1284.4 synchronous commands) is discarded.

OFF:
IEEE1284.4 is disabled and IEEE1284.4 synchronous commands
are ignored. Compatible interface is the initial state.

Epson Stylus Color 980 Specifications

General

Brand	Epson
Model	Stylus Color 980
Category	Printer
Language	English