Tally Dascom 7106Series Programmer's Manual page 8

4 Bit map area
The bit map area is a buffering area for output data. The data in this
area is generated by a rasterizer according to the data in the field
data area and corresponds to i n dividual dots that are generated on
the label during printing. The data of the bit map area is printed on the
label with high quality and at high speed by means of the printer
control program and exclusive thermal control circuit.
1-6