KB2502 datasheet(39/62 Pages) SAMSUNG

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KB2502

VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS

Preliminary

COLORING

If you have an Intensity feature, the number of possible colors you can express becomes doubled. In other words,

the number of colors you can represent with three colors blue, green, and red is 8 ( = 23), but with the intensity

feature, it is 16 ( = 24).

•

Character Color

Character color is assinged for each font, and the 4 components for expressing a color are listed below.

•

Raster Color

According to the 'BOXE' bit setting, raster color can be assigned in units of font or row. There is a trade-off in either

case. If 'BOXE' Bit is set to '1', the box drawing feature can be carried out in units of font, but the raster color can

only be assigned in units of row. On the other hand, if 'BOXE' bit is set to '0', the box drawing feature can't be

carried out, but you can assign raster color in units of font.

Blue

Character & attribute register's B bit[C]

Green

Character & attribute register's G bit[B]

Red

Character & attribute register's R bit[A]

Intensity

Character & attribute register's BLINK/FINT bit[9]

Row attribute register's INTE bit[D]

Row attribute register's CINT bit[4]

If all 3 bits are set to '1', the character intensity feature is enabled.

Blue

Row attribute register's RB bit[8] if the row attribute register's 'BOXE' bit is '1', and character

& attribute register's 'BINV' bit[F] if BOXE' bit is '0'.

Green

Row attribute register's RG bit[7] if row attribute register's 'BOXE' Bit is '1', and character &

attribute register's 'BOX1' bit[E] if 'BOXE' bit is '0'.

Red

Row attribute register's RR bit[6] if row attribute register's 'BOXE' bit is '1', and character &

attribute register's 'BOX0' bit[D] if 'BOXE' bit is '0'.

Intensity

Character & attribute register's BLINK/FINT bit[9]

Row attribute register's INTE bit[D]

Row attribute register's RINT bit[5]

If all 3 bits are set to '1', the raster intensity feature is enabled.

Notes for When Making KB2502 Fonts

Address 000h is appointed as blank data. RAM's initial values are all 0, and all bits are written as 0 when you

erase the RAM, so blank data means the initial value. In other words, blank data means 'do nothing'. You don't

need to write any data for the space font, except for 000h. It just needs to be an undotted area.

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