Lexmark Dot Matrix Technical Reference - Page 206
Set Font Global, ESC [I, countlow Ln, counthigh Hn, fgidhigh Hf, fgidlow Lf
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Set Font Global, ESC [I You can vary the font and pitch type style within a file with this command. It can also be used to change the code page. Syntax: ESC [ I LnHn HfLf HsLs Sm HcLc Decimal: 27 91 73 LnHn HfLf HsLs Sm HcLc Hex: 1B 5B 49 LnHn HfLf HsLs Sm HcLc ESC [I changes the font, pitch, and code page. It uses the following best-fit algorithm: 1 Requested font, pitch, and code page. 2 Requested pitch and code page, first font found. 3 Requested code page, first font and pitch found. 4 No change. countlow (Ln): A 1-byte binary number that is the less significant byte of the 2byte parameter count. counthigh (Hn): The binary number that is the more significant byte of the 2byte parameter count. Zero is a valid count. fgidhigh (Hf): The binary number that is the more significant byte of the 2-byte font global ID. fgidlow (Lf): The binary number that is the less significant byte of the 2-byte font global ID. 206 Section 9: Code Pages