Figure 5.1 Basic Operations - Fujitsu M304X Series Oem Manual

CHAPTER 5 CENTRONICS-COMPATIBLE INTERFACE
This chapter describes the Centronics-compatible interface used es the I/O
interface to the-M304x series line printer.
5.1 Operation Outline
Basic printer operations which are data transfer, printing, and forms feed, are
shown in Figure 5.1.
Data transfer cycle
The printer goes online when one of the following conditions occurs (see
Section 5.2 for itnerface signals):
. When the START/STOP switch is pressed:
. When control code DC1 (X'll') and interface signal Data: Strobe are received:
When the printer is online, interface signal Select is set to 1 and the
START/STOP lamp is on.
Acknowledge signal.
conditions occurs:
When the control code (CR, LF,
. When the FCB command is received (see Section 5.5):
. when the print data buffer (PDB) becomes full:
The character code received first is printed in the first print position, the
one received second in the second print position, and so on.

Figure 5.1 Basic operations

The printer sets the Busy signal to 0 and issues the
In online mode, the printer receives: i-line print data
FF, VT, or DC3) is received (see Section
Forms feed cycle
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