9400 Series Programmer's Manual
There are three main buffers: batch, format, and graphic. The printer also has a 1024 byte input buffer which holds data until it is processed into the respective buffer(s).
Data Flow Control
The printer uses Xon/Xoff or data terminal ready (DTR) for data flow control. DTR flow control is usually required if you are using an
In DTR mode, the printer activates DTR when the printer can accept more data from the host and deactivates when the printer's receive buffer is nearly full. In Xon/Xoff Mode, the printer sends the Xon character when the printer can accept more data and sends Xoff when the printer buffer is nearly full.
In either mode, once the printer has indicated that its buffer is nearly full (by sending Xoff or deactivating DTR), up to 134 additional characters may be accepted without losing any data.
The printer does not require any hardware or software signals from the host system in order to operate.
NOTE: Flow control characters can be changed offline through the Printer Configuration mode.
The total number of formats, batches, and graphics is only limited by the amount of memory available.
