Epson 8900 Series - Manual (Page 110)

Set Character Pitch to 12 cpi
Escape sequence: ESC z
Hexadecimal: 1B 7A
This command sets the character pitch to 12 cpi.
Line Spacing Commands
The following paragraphs describe the commands for line spacing
operations in the Model 855 WP emulation mode.
Set Vertical Motion Index to ( n-1)/48 Inch
Escape sequence: ESC RS n
Hexadecimal: 1B 1E n
The variable n can be any value in the range of 1 through 85, resulting
in a VMI range of 0 through 84/48 (0 through 1.75) inches.
Set Vertical Motion Index to ( n-1)/144 Inch
Escape sequence: ESC FS n
Hexadecimal: 1B 1C n
The variable n can be any value in the range of 1 through 255,
resulting in a VMI range of 0 through 254/144 (0 through 1.76)
inches.
Character Set Commands
The character set commands for the 855 WP mode are limited to the
following commands that cause the printer to print special characters
similar to those printed by daisy-wheel printers.
Print Special Character
Escape sequence: ESC SP
Hexadecimal:
1B 20
Escape sequence: ESC /
Hexadecimal: 1B 2F
TI Model 855 Printer WP Emulation 5-18