Graphic Orders
MOTOROLA
MC68322 USER’S MANUAL
13-5
13.2 SEQUENCE OF THE DISPLAY LIST
The following is an example of a typical display list illustrating how the initialization graphic
orders work with the bitBLT and scanline graphic orders.
13.3 GRAPHIC ORDER ADDRESSES
In the following graphic order descriptions, operand lengths for addresses are sometimes
given as a pair of numbers. For example, 28 of 32. This indicates that the address (in this
case a byte address) occupies the least-significant 28 bits of the long-word operand and that
the MC68322 controls the four most-significant bits. For more information on address
constraints for graphic orders, scanline tables, and bit maps see Section 12 Graphic
Operations.
Some graphic orders specify address parameters that must be aligned to byte or word
boundaries. When a byte address is required to be aligned on a word boundary, its least
significant bit should be zero. The MC68322 forces the bit to be zero internally. There are
two combinations of address granularity and alignment used by MC68322 graphic orders.
In the descriptions of graphic orders and definitions of their parameters, the following two
phrases are used:
Bit address—A 32-bit bitmap address that points to any bit location in memory and
specifies bitmap locations and pixels.
Byte address, word aligned—A 28-bit word-aligned address that points to any word
location in DRAM space. It is used for referencing graphic order instructions, scanline
tables, and halftone companion tables.
SET_UBMAP
Set parameters for rendering a full page into an unbanded bitmap.
SET_BOOL_D and BLT2UB_D
Set the destination only Boolean code to draw in white, and clear the entire page.
SET_SBMAP
Set up for transfer from a font cartridge of a bit mapped font.
SET_BOOL_SD
Draw the following characters in black.
BLT2UB_SD, BLT2UB_SD, and
BLT2UB_SD
Place three characters on the page.
SET_HTBMAP
Identify a light gray repeating halftone pattern.
SET_BOOL_HD
Identify a light gray repeating halftone pattern.
SL2UB_HD
Apply the halftone gray pattern during an upcoming transfer.
STOP
Render an entire scanline table image in light gray
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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