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xiv Contents
Troubleshooting, continued
Italics (Epson Emulation) .................................................... 123
Print Positioning.................................................................. 123
Paper Problems .................................................................. 124
Switch Panel ....................................................................... 127
Communications ................................................................. 129
Printhead Performance....................................................... 130
Troubleshooting Aids .................................................................. 131
Power-Up Sequence Test................................................... 131
Hex Dump Mode................................................................. 132
Control Commands—An Introduction
Communication Basics .............................................................. 135
Identifying Data Bytes ................................................................ 136
Binary Number System ...................................................... 137
Decimal Number System ................................................... 137
Hexadecimal Number System ............................................ 138
Three Categories of Data Bytes ......................................... 140
Sending Control Codes and Control Sequences ....................... 141
Using BASIC to Send Commands ..................................... 142
Using Batch Files to Send Commands ............................... 142
Sending Commands From The DOS Command Line ........ 144
Using Control Key Sequences To Send Commands ......... 144
Typographic Conventions .......................................................... 146
Format ................................................................................ 146
Parameters ........................................................................ 147
Data Byte Values of Command Parameters ...................... 148
Zeros and Ones .................................................................. 148