Datamax-O'Neil APEX Series Programmer’s Manual - Manual (Page 32)

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This data may be represented in hexadecimal:
0x55 0x55 0x00 0x00 0xAA 0x11
0x55 0x00 0x55 0x55 0x55 0x55
The RLE compressed graphics command:
ESC ‘v’ height width counter data…
DEC 27 118 2 6 255 85 255 0 3 170 17 85 0 253 85
HEX 0x1B 0x76 0x02 0x06 0xFF 0x55 0xFF 0x00 0x03 0xAA 0x11 0x55 0x00 0xFD 0x55
Printer Controls – Data Processing
The printer can be operated in two modes, Online and Buffer mode. In online mode, the characters are printed as they are
received. In buffer mode, the characters received are stored in the print buffer and printed upon receipt of the EOT character
(^D). Also if the printer is in Buffer Mode and the print buffer is full, the printer will start printing but will remain in the Buffer Mode
until the Online Mode command is sent to the printer.
Enable Buffer Mode ESC P $
This command selects the printer buffer mode.
Escape Sequence: ESC P $
Hexadecimal: 1B 50 24
Decimal: 27 80 36
Disable Buffer Mode (Select Online Mode) ESC P #
This command disables the printer buffer mode and selects the online mode. The online mode is the default mode of operation
of the printer.
Escape Sequence: ESC P #
Hexadecimal: 1B 50 23
Decimal: 27 80 35