5525B/31/32 Line Matrix Printer User's Manual
Table Of Contents
- 1 Introduction
- 2 Setting Up the Printer
- 3 Operating the Printer
- 4 The Configuration Menus
- Configuration Overview
- CONFIG. CONTROL
- ACTIVE EMULATION
- EMULATION
- PCL-II Emulation
- LinePrinter Plus Emulations
- Optional Emulations
- PCL-II Emulation
- LinePrinter Plus Emulation
- P-Series Emulation
- Proprinter XL Emulation
- Epson FX Emulation
- IGP/PGL Submenu
- Features
- Configuring the Emulation with the Control Panel
- Define CR Code (Carriage Return)
- Define LF Code (Line Feed)
- Autowrap
- Select SFCC
- PI Slew Range
- CR Edit
- Select Font
- Select LPI
- Auto Uppercase
- Skip Command Prefix
- Power On IGP/PGL
- Extended Execute Copy
- UPC Descenders
- Compressed CPI
- Ignore Character
- IGP100 Compatbl.
- Optimized Ratio
- IGP/VGL Emulation
- MAINT / MISC
- HOST INTERFACE
- ETHERNET PARAMETERS
- PRINTER CONTROL
- DIAGNOSTICS
- RIBBONMINDER
- 5 Interfaces
- Overview
- Dataproducts Long Line Interface
- IEEE 1284 Parallel Interface
- RS-232 and RS-422 Serial Interfaces
- Host System Configuration
- Internal Ethernet Adapter Configuration
- Configuring the Internal Ethernet Adapter for TCP/IP
- Host Software
- Compiling Host Software
- Computer-aided Configuration with ezsetup or npconfig
- Configuration Through the Network with ARP
- Configuration Through the Network with RARP
- Configuration Through the Network with BOOTP
- Restoring Factory Defaults
- Host Configuration
- Direct Printing Without Spooler
- Printing Via the Spooler
- Custom Interface Scripts
- BSD UNIX
- System V UNIX
- npd Pseudo-device Interface
- Other TCP/IP Methods
- Configuring The Internal Ethernet Adapter For Novell
- Configuring the Internal Ethernet Adapter for Windows
- 6 Troubleshooting
- A Printer Specifications
- B Downloading Firmware
- C ASCII Character Set
- D Communication and Trademark Information
Chapter 5 IEEE 1284 Parallel Interface
134
IEEE 1284 Parallel Interface
The 1284 supports three operating modes, which are determined by
negotiation between the printer and the host.
Compatibility Mode
This mode provides compatibility with Centronics
-like host I/O. Data is
transferred from the host to the printer in 8-bit bytes over the data lines.
Compatibility Mode can be combined with Nibble and Byte Modes to
provide bidirectional communication.
Nibble Mode
Eight bits equals one byte. When a byte of data is sent to the printer,
the eight bits are sent over eight data lines.
Some devices cannot send data over their eight data lines. To bypass
this, the 1284 permits data to be sent as half a byte over four status
lines. (Half a byte equals one nibble.) Two sequential four-bit nibbles
are sent over the lines.
Data is transferred from printer to host in four-bit nibbles over the status
lines, and the host controls the transmission.
Byte Mode
The printer and host send data to each other along eight data lines (one
bit per line).
If bidirectional communication is supported by the printer and the host,
the host will take control of the data transfer.