Unisys E-@CTION EFP9800 - Manual (Page 220)

EF4270 Emulation Commands
9–16 3255 4073–002
Underline Print
Activates the 9th wire on all character cells to underline all printable characters,
including a space (blank) character.
Hexadecimal Decimal ASCII
1B 43 27 67 ESC C
Underline Off
Turns off underline printing.
Hexadecimal Decimal ASCII
1B 44 27 68 ESC D
Double-High Off
Turns off double-high printing.
Hexadecimal Decimal ASCII
1B 45 27 69 ESC E
Double-High Font
Starts double-high printing. This command requires the printhead to make two
passes to print one double-high line. The paper is automatically advanced
between each pass.
This command may be used with the Double-Wide Font command (0E).
Hexadecimal Decimal ASCII
1B 48 27 72 ESC H