
Epson Research and Development
Page 23
Vancouver Design Center
Programming Notes and Examples
S1D13706
Issue Date: 01/02/23
X31B-G-003-03
4 bpp color
When the S1D13706 is configured for 4 bpp color mode the first 16 entries in the LUT are
used. Each byte in the display buffer contains two adjacent pixels. The upper and lower
nibbles of the byte are used as indices into the LUT.
The following table shows LUT values that simulate those of a VGA operating in 16 color
mode.
Table 4-7: Suggested LUT Values to Simulate VGA Default 16 Color Palette
Index
Red
Green
Blue
00
00
00
00
01
80
00
00
02
00
80
00
03
80
80
00
04
00
00
80
05
80
00
80
06
00
80
80
07
C0
C0
C0
08
80
80
80
09
FC
00
00
0A
00
FC
00
0B
FC
FC
00
0C
00
00
FC
0D
FC
00
FC
0E
00
FC
FC
0F
FC
FC
FC
10
00
00
00
...
00
00
00
FF
00
00
00
= Indicates unused entries in the LUT