MB86290A Datasheet, PDF (65/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

6.3 Bit Map Operation
6.3.1 BLT
A rectangular shape in pixel units can be transferred between two separate
physical memory areas as follows:
(1) From host CPU to Drawing frame memory
(2) From Graphics Memory (other than Drawing frame memory area) to
drawing memory
(3) From host CPU to internal texture memory
(4) From Graphics Memory to internal texture memory
When Drawing frame memory is designated as the destination, the result of
logical calculation between the source and current value in the designated
destination can be stored as well. If part of the source and destination of the
BLT field are physically overlapped in the display frame, the start address
(from which vertex the BLT field to be transferred) must be set carefully.
Usage caution: When transferring a rectangle from one graphics memory to
another graphics memory (drawing frames included), or from
the host CPU to the internal texture memory, the width of the
rectangle must be at least 5 pixels (in direct color mode) or 9
pixels (in indirect color mode).
6.3.2 Pattern Data Format
MB86290A can handle three bit map data formats: indirect color mode (8
bits/pixel), direct color mode (16 bits/pixel), and binary bit map (1 bit/pixel).
The direct color mode is used for texture patterns. Either the indirect or
direct color mode is used for tiling patterns. The binary bit map is used for
character/font patterns, where foreground color is used for bitmap = 1 pixel,
and background color is applied for bitmap = 0 pixels.
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