Star Micronics Dot Impact Printer - Manual (Page 42)

3-34 STAR Command Specifications
Rev. 0.70
[Ex.] When selecting 7 x 9 fonts, and defining the character to 21H:
ESC & NUL n1 n2 m d1 d2 d3 d4 d5 d6 d7
Code (Hexadecimal) 1B 26 00 21 21 80 3E 40 88 00 88 40 3E
(1 when printing corresponding bits, and 0 for no print)
d1 d2 d3 d4 d5 d6 d7
7 Dots
MSB
LSB
8 Dots