Printer Control Code Format
Some printer control codes perform single, specific functions by themselves, while others perform multiple functions according to the parameters specified after the control code.
A printer control code with parameters has the following format:
| Control Code | Count | Parameter 1 | Parameter 2... |
|---|---|---|---|
| 1 or 2 bytes | 1 byte | 1 or 2 bytes | 1 or 2 bytes |
A count consists of 1 byte, and indicates the length of the parameters (including the count) after the control code, in bytes. For example, a count and two 1-byte parameters is shown as X'03', because the count itself is included. Some control codes, such as the Printing Position (PP) control code, do not have counts.
A parameter can be 1 or 2 bytes in length. The number of bytes
depends on the control codes. Not all control codes have parameters.
Note: In this manual, counts and parameters that are actually
processed in binary are all expressed in hexadecimal (0–F) to
improve readability.