SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 96

• Manufacturer Part Number: SPC8104
• Description: VGA LCD CONTROLLER
• Manufacturer: S-MOS Systems

Attributes Controller Registers
Hardware Functional Specification
Attributes Controller Index/Data Register
3C0h RW
n/a
00 - 0F EGA Palette Registers RW
n/a
10 Mode Control Register RW (see note below)
EGA Palette
Bits 4, 5
Control
11 Overscan Color Register RW (see note below)
Dummy bit 7
(see note)
12 Color Plane Enable Register RW
n/a
13 Horizontal Panning Register RW (see note below)
n/a
14 Color Select Register RW
n/a
SP1-70
index 10 Mode Control Register bit 6 - the Dummy Pel Width bit is a read/write bit that has no
effect in hardware. This bit is provided for compatibility with some software that expects to use
the value stored in this VGA-defined register bit to determine if mode 13h is set.
index 11 Dummy Overscan Color Register bits 7,6 - are read/write bits that have no effect in
hardware. These bits are provided for compatibility with some software that expects to read or
write these bits.
index 13 Horizontal Panning Register - any pan value > 07h is treated as pan value = 0.
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3C0h W 3C1h R
n/a
n/a
Dummy
Pel Width
(see note)
Dummy bit
6 (see note)
n/a
n/a
n/a
EGA
Palette
Enable
Secondary
Red
Pixel Pan
Compat
bit 5
RO status
Read as 0
n/a
n/a
bit 4
Secondary
Green
n/a
bit 4
RO status
Read as 0
n/a
n/a
Overscan Color
X15-SP-001-08.1
bit 3
Secondary
Blue
Blink/
Intensity
bit 3
Enable
Plane 3
bit 3
n/a
Attributes Controller Index
Primary
Red
bit 2
n/a
bit 2
Enable
Plane 2
bit 2
n/a
Horizontal Pan Count
bit 1
Primary
Green
Mono Mode
Select
bit 1
Enable
Plane 1
bit 1
bit 1
Color Select
bit 0
Primary
Blue
Graphics
Mode Select
bit 0
Enable
Plane 0
bit 0
bit 0
412-1.0
SPC8104