Epson Research and Development
Page 31
Vancouver Design Center
Programming Notes and Examples
S1D13503
Issue Date: 01/01/30
X18A-G-002-06
3.2.7 Sixteen Colors (Four Bits/Pixel in Color Mode)
When the S1D13503 has 4-bit color pixels, each pixel can index into each of the three color LUTs. The LUT bank bits are
ignored in this mode.
16-Level Color Mode
Figure 8: 16-Level Color Mode Look-Up Table Architecture
Table 3-10: Simulation Of First 16 Entries Of Standard VGA Palette
Address
Red
Green
Blue
Address
Red
Green
Blue
00
00
00
00
08
00
00
00
01
00
00
0A
09
00
00
0F
02
00
0A
00
0A
00
0F
00
03
00
0A
0A
0B
00
0F
0F
04
0A
00
00
0C
0F
00
00
05
0A
00
0A
0D
0F
00
0F
06
0A
0A
00
0E
0F
0F
00
07
0A
0A
0A
0F
0F
0F
0F
4-bit pixel data
Red Look-Up Table 16x4
0
1
2
3
C
D
E
F
Green Look-Up Table 16x4
0
1
2
3
C
D
E
F
Blue Look-Up Table 16x4
0
1
2
3
C
D
E
F
4-bit ‘RED’ Look-Up Table data output
4-bit ‘GREEN’ Look-Up Table data output
4-bit ‘BLUE’ Look-Up Table data output
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