Graphics Printing - Epson TM-L90 Developer's Manual

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Graphics Printing

Graphics printing is supported by the following commands.
• NV graphics command GS (L, GS 8L
You can use other command shown below which traditional model has. However we
recommend to use GS (L, GS 8L.
• Download bit image command GS *, GS /
• Raster bit image command GS v0
• Normal bit image command ESC *
A main characteristic is as follows.
NV graphics
GS (L, GS 8L
Download bit
image
GS *, GS /
Raster bit image
GS V 0
B it image
ESC *
Differences Between GS ( L and GS 8 L
J All commands possess the same functions for "Graphics data processing."
J Specifications (conventions) concerning function code (fn) are identical, while only the
parameters (pL, pH, p1, p2, p3 and p4) used to specify the parameter values from m on
differ.
Command
GS ( L
GS 8 L
• Make sure to use GS 8 L when the parameter value exceeds 65535 bytes for functions 67
and 112.
Rev. A
Comprehensive command of NV bit image, down load bit image and other
conventional bitmap image function. For the TM-L90 , two color graphics printing
is available. Recommend to use this command. When executing this command,
definition data of NV bit image and download bit image are deleted.
Read bit image date temporarily from memory and print. There is size limitation.
Data is cleared by reset or power off, but if you print bit image many times data
are downloaded one time. After that high speed printing is available. However
only one bit image can register.
Normal bit image specify each columnar 8 bit data, but high speed printer
which has thermal printing mechanism become poor performance. Then
specify data horizontally and improve printing speed.
Normal bit image printing method. There is no size limitation, but need to send
data every time. The printer which has thermal printing mechanism have to
storage each line data and slow speed printing.
Description
Parameter value is 2 bytes less than that for GS 8 L.
Used to fix the parameter value.
Used when sending data divided into blocks.
Possesses powerful range of expression.
Used for batch transfer of large volumes of data.
TM-L90 Developer's Guide
Application Development Information 4-9