Specifications

Programmers Guide TH230/TH230+
128
• The unused capacity data in the NV graphics domain is distinguished
from other send data by unique data inserted in each data block. When
the header sent from the printer has a hexadecimal value of 0x37 and
decimal value of 55, process the data up to NUL (hexadecimal value
0x00 and decimal value 0) as a single data group, using the data shown
in the table below for identification.
Send Data Hexadecimal Decimal
First byte (header) 0x37 55
Second byte
(identifier)
0x31 49
• Note that the following procedures are required for processing the data.
• When communication with the printer uses XON/XOFF control, the
XOFF may interrupt the “Header to NUL” data string.
• Do not use this function in conjunction with NV bit images (FS q).
• The domain of the NV graphics data can be selected by using Function 5
of the GS ( E command.
(Unit: byte)
Selectable data domain Default
0, 64 K, 128 K, 192 K, 256 K, 320 K, 384 K 384 K
An area of 24 bytes is used for the control information for each item of
NV graphics.
• Each graphics needs an header with 18 (12 +6) Byte. The memory which
one graphics need can calculated by: INT(((graphics size + 18) +3) / 4) *
4
• NV-Memory for GS ( L graphics is shared with other graphics (ESC
(+*.BMP file), GS *, GS 0x84)