Initialize Printer

Escape sequence: ESC @

Hexadecimal: 1B 40

This command resets the printer to its initial state and clears the print buffer of all printable data from the last line printed before the command was received.

Set Most Significant Bit to Zero

Escape sequence: ESC =

Hexadecimal: 1B 3D

Some computers, when sending characters from 7-bit character sets, automatically set the most significant bit (MSB) of each character to 1. This causes the printer to print all received characters as italics or character graphics. To prevent this, the Set Most Significant Bit to Zero command sets the MSB of each subsequently received character to 0.

Set Most Significant Bit to One

Escape sequence: ESC >

Hexadecimal: 1B 3E

This command sets the MSB of all subsequently received characters to 1. This enables the printer to select characters from either the italics character set or the extended graphics character set.

Epson FX Printer Emulation Mode 8-11

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Epson 8900 Series manual Initialize Printer, Set Most Significant Bit to Zero, Set Most Significant Bit to One