Epson GT-6500 EN - Manual (Page 133)

ESC Z Set gamma correction
Format: B2 B3 B4 B5 A5
Command:ASCII: ESC Z
Decimal: 27 90
Hexadecimal: 1B 5A
Parameter: i
Handshaking:
1 ESC Z command
2 ACK code
3 Parameter (i)
4 ACK code
Parameter range:
i = 01
H
(1) : CRT Display A B2 B3 B4 B5 A5
i = 02
H
(2) : CRT Display B B2 B3 B4 B5 A5
i = 00
H
(0) : Printer Output A B2 B3 B4 B5 A5
i = 03
H
(3) : User-defined Gamma Table B4 B5 A5
i = 10
H
(16) : Printer Output B B2 B3 B4 B5 A5
i = 20
H
(32) : Printer Output C B2 B3 B4 B5 A5
Default value: i = 01
H
Command Reference 3-39