Yamaha V9938 Programmer's Manual page 40

table base address is stored in register R#2, and corresponds to the cell (0, 0) with
address 0 in the picture below.
0
0 0
1 32
...
...
22 704
23 736
↑
Y
3.4.3. Color register settings
You can set color of the margin of the screen (backdrop color) specifying BD3...BD0
bits in register R#7. Note that bits TC3...TC0 of R#7 are ignored.
3.4.4. Color table settings
Table start address is set in registers R#3 and R#10.
MSB
R#3
R#10
Color table size is 32 bytes, each byte organized in the same way as register R#7 (FC
is foreground color, BC is background color). Patterns 0...7 are assigned the first color
from color table, patterns 8...15 are assigned second color from the color table, etc, and
patterns F8h...FFh are assigned 31
below.
MSB 7 6
0 FC3 FC2
1 FC3 FC2
... ...
... ...
... ...
31 FC3 FC2
© 1985 ASCII CORP. / NIPPON GAKKI CO.
1 2
1 2
33 34
... ...
... ...
705 706
737 738
7 6 5
A13 A12 A11
0 0 0
st
color from the color table. Color table map is provided
5 4 3
FC1 FC0 BC3
FC1 FC0 BC3
... ... ...
... ... ...
... ... ...
FC1 FC0 BC3
Columns
3
3 ...
35 ...
... ...
... ...
... ...
... ...
4 3 2
A10 A9 A8
0 0 A16
2 1 0
BC2 BC1 BC0
BC2 BC1 BC0
... ... ...
... ... ...
... ...
BC2 BC1 BC0
Page 40 of 108
31
... 31
... 63
... ...
... ...
... 735
... 767
1 0 LSB
A7 A6 Color table base
address
A15 A14
registers
LSB
Color for patterns 0...7
Color for patterns 8...15
Color for patterns F8...FF
© 2010-2015 Eugeny Brychkov
← X