![](http://datasheet.mmic.net.cn/30000/MC68322FT16_datasheet_2368702/MC68322FT16_198.png)
Graphic Orders
SL2BB_D
MOTOROLA
MC68322 USER’S MANUAL
13-49
SL2BB_D
Destination Only Scanline Transfer to Banded Bitmap
Note: * Denotes A Parameter That The MC68322 Updates When The Frame Crosses A Band Boundary.
The SL2BB_D graphic order causes the MC68322 to render a scanline table image to a
banded bitmap. The destination is manipulated as specified by the Boolean code last set by
the SET_BOOL_D graphic order. The SET_BBMAP graphic order must previously define
the destination banded bitmap parameters.
When the B2T flag is clear, SLTA points to the most-significant byte of the first bit string
specifier in the table and DA refers to the pixel to which the displacement of the first bit string
specifier is added (not necessarily the first bit of the first run). When the B2T flag is set, SLTA
points to the most-significant byte of the last word of the final bit string specifier in the table,
and DA refers to the pixel that lies just past the end of the final bit string specifier run. In
neither case does SLTA point to the 0000
16 scanline table terminators. Since the scanline
table’s bit string specifiers must be placed at word boundaries, SLTA must be word-aligned.
When a band fault is detected, the MC68322 rewrites the scanline graphic order to update
its parameters. The BAND number is incremented (or decremented when the B2T flag is
set). DA is written back corresponding to the pixel following the last run rendered (or when
the B2T flag is set, the pixel preceding the next bit string specifier’s run) and SLTA points to
the next specifier to be executed when the rest of the scanline table is rendered to the next
band. The contents of the scanline table is left unchanged after a band fault.
Related Graphic Orders
SET_BOOL_D
SET_BBMAP
PARAMETERS
SIZE
DESCRIPTION
0x34
BAND*
DA*
SLTA*
Byte
Long Word
28 of 32 bits
SL2BB_D Opcode.
Band number when graphic order is executed.
Destination logical bit address.
Scanline table physical byte address, word aligned.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.