Toshiba B-850 manual When Topix compression mode is selected, Not present Present

[When TOPIX compression mode is selected:]

Range for length

Graphic data

First line

Length L1

L2

L3

Second line

L1

(1) Length: Total number of bytes of the graphic data (0001H ~ )

Ex. Length = 20 bytes:

0 0 1 4

(2) L1 parameter: Shows in which large block (512 dots/block) the changed data is contained.

7 6 5 4 3 2 1 0

L1

0: Not present

1: Present

512 dots

512 dots

512 dots

(3)L2 parameter: Shows in which medium block (64 dots/block) the changed data is contained (of the L1 large block).

7 6 5 4 3 2 1 0

L2

0: Not present

1: Present

64 dots

64 dots

64 dots

(4)L3 parameter: Shows in which small block (8 dots/block) the changed data is contained (of the L2 medium block).

7 6 5 4 3 2 1 0

L3

0: Not present

1: Present

8 dots 8 dots 8 dots

Exclusive-OR is carried out between the current image data and the image data one line previous. Only the changed bit is set to ON (1). The alignment of dots is MSD (left dots) and LSB (right dots).

*The graphic width for only the smaller value of either the designated value or the max. buffer size (512 KB) is drawn. The minimum unit of the data drawing is 8 dots (1 byte). If the graphic width is set to 3 dots, it will be reset to 8 dots (1 byte).

- 169 -