Epson GT-6500 EN - Manual (Page 206)

Halftoning mode (ESC B command)
Setting SW 2-1 SW 2-2
Disabled OFF OFF
Halftoning mode A ON OFF
Halftoning mode B OFF ON
Halftoning mode C ON ON
Gamma correction (ESC Z command)
Setting SW 2-3 SW 2-4 SW 2-5
CRT Display A OFF OFF OFF
CRT Display B ON OFF OFF
Printer Output A OFF ON OFF
Printer Output B ON ON OFF
Printer Output C OFF OFF ON
Color correction (ESC M command)
Setting SW 2-6 SW 2-7
Impact dot matrix printer OFF OFF
Thermal transfer printer ON OFF
Ink jet printer OFF ON
CRT Display ON ON
B-24 Scanner Model Technical Data