Set and Reset Codes

Set and Reset Codes

Set and reset are another way of saying turn on and turn off, select and deselect, or enable and disable.

Some printer features are set and reset with an escape sequence and the numbers 1 or 0. In such cases you can represent 1 and 0 as hexadecimal codes 01 and 00, or as the ASCII codes for the numerals 1 and 0 (hexadecimal 31 and 30).

NUL Code

NUL (hex 00) is ignored by the printer and can be used as a fill character; however, it can not be used to add blank spaces since it is not a space character. NUL can also be used as a parameter terminator for the Set Horizontal Tabs (page 175) or Set Vertical Tabs multibyte control code (page 195).

NOTE: Hex 80 in the 0437 PC Character Set and Hex 7F in the 0850 PC Character Set are treated as a NUL; however, these two controls can not be used as parameter terminators.

155

Page 155
Image 155
IBM 4400 manual Set and Reset Codes