SCANTECH ID (Champtek company) Discovery SG-20 - Manual (Page 98)

90 Appendices
E DOWNLOADING IMAGES, ICONS AND FONTS INTO THE
DISCOVERY
The Discovery is equipped with re-programmable Flash Memory which can hold
the following information:
9 Character sets (fonts), 6 are free definable.
36 Full screen images
32 Icons
Fonts
Every character set consists of character numbers 32 (= space) through 255 (=
224 characters). A single character is defined inside a pixelarea of 10 x 16
pixels. Only bits 0-5 of the flash memory bytes are used for pixel information;
Therefore 1 character uses 32 bytes of memory.
Example of a simple 'A' character :
PIXEL BINARY NOTATION HEX NOTATION
----------
00000000 00000000 0x00 0x00
---------- 00000000 00000000 0x00 0x00
---- ----- 00000000 00100000 0x00 0x20
--- - ---- 00000001 00010000 0x01 0x10
-- --- --- 00000010 00001000 0x02 0x08
-- --- --- 00000010 00001000 0x02 0x08
-- --- --- 00000010 00001000 0x02 0x08
-- --- 00000011 00111000 0x03 0x38
- ----- -- 00000100 00000100 0x04 0x04
- ----- -- 00000100 00000100 0x04 0x04
- ----- -- 00000100 00000100 0x04 0x04
- ----- -- 00000100 00000100 0x04 0x04
- ----- -- 00000100 00000100 0x04 0x04
- ----- -- 00000100 00000100 0x04 0x04
---------- 00000000 00000000 0x00 0x00
---------- 00000000 00000000 0x00 0x00
A whole character set uses 224 x 32 = 7168 (0x1C00) bytes. Only Set3, which
contains the Sg10 special character set, contains 255 characters (0 - 254) and
therefore takes 8160 bytes of memory.
The Discovery uses 1 complete sector of flash memory (= 65536 bytes) for its
character sets :