Brother HL-1660E - Manual (Page 235)

USER’S GUIDE
Appendix–41
Ÿ 16 bit repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 0,
0, the remaining 13 bits indicate the number of times to repeat 16 bit data.
The following 2 bytes should be the 16 bit data to repeat.
15 14 13 12 0
1 0 0 number of repeats(13 bits)
data to repeat(16 bits)
Ÿ 8 bit repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 1,
0, the following 5 bits indicate the number of times to repeat 16 bits (two
by 8 bits) data. The remaining 8 bits should be the 8 bit data to repeat.
15 14 13 12 8 7 0
1 1 0 number of repeats data to repeat(8 bits)
(5 bits)
Ÿ 4 bit repeating compression data
When the most significant 3 bits in the first 2 bytes are in the order 1, 0,
1, the following 4 bits indicate 4 bit data to repeat. The remaining 9 bits
indicate the number of times to repeat the 16 bit (4 by 4 bits) data.
15 14 13 12 9 8 0
1 0 1 data to repeat number or repeats(9 bits)
(4 bits)
Ÿ Vertical repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 1,
1, the remaining 13 bits indicate the same data words as in the previous
line.
15 14 13 12 0
1 1 1 the same data words as in the previous line (13 bits)
The printer can not support the APT and HRC function in the 1200 dpi
printing mode.