Epson 4500 Error handling, Handshaking timing, Baud rate selection, 5-50Using the Printer Options

The Interface Boards

Baud rate selection

You can select baud rates from 75 to 19,200 BPS (Bits Per Second). When setting the baud rate, make sure you use the bit rate selection table for printers with buffers (in the #8143 interface manual).

For more information on the printer’s input buffer settings, see the section on DIP switch functions in Chapter 3 of this manual.

Handshaking timing

When the vacant area for data in the input buffer drops to 256 bytes, the printer outputs an X-OFF code or sets the DTR flag to "1" (MARK) indicating that it cannot receive data.

Error handling

When a parity error is detected, your printer prints an asterisk (*). All other errors, including framing and overrun, are ignored.

5-50 Using the Printer Options