SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 97

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

CRT Controller Registers
SPC8104
CRT Controller Index/Data Register
3B4h/3D4h RW
n/a
00 Dummy Horizontal Total Register RW (see note below)
bit 7
01 Dummy Horizontal Display Enable End Register RW (see note below)
bit 7
02 Dummy Horizontal Blanking Start Register RW (see note below)
bit 7
03 Dummy Horizontal Blanking End Register RW (see note below)
Dummy Read
Select
04 Dummy Horizontal Retrace Start Register RW (see note below)
bit 7
05 Dummy Horizontal Retrace End Register RW (see note below)
bit 7
06 Dummy Vertical Total End Register RW (see note below)
bit 7
07 CRTC Overflow Register RW
Dummy
VRTC Start
bit 9
(see note)
08 Preset Row Scan Register RW
n/a
412-1.0
n/a
bit 6
bit 6
bit 6
bit 1
bit 6
bit 6
bit 6
Dummy
VDisplay
End
Position bit 9
(see note)
Dummy Display Enable Skew
bit 1
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Byte Pan
Value
3B5h/3D5h RW
bit 5
bit 5
bit 5
bit 5
bit 0
bit 5
bit 5
bit 5
Dummy
VTotal End
bit 9
(see note)
bit 0
bit 4
bit 4
bit 4
bit 4
bit 4
bit 4
bit 4
bit 4
Line
Compare
bit 8
bit 4
Dummy Horizontal Total
Dummy HBlank Start
Dummy HRTC Start
Dummy HRTC End
Dummy HDE End
Dummy VTotal
X15-SP-001-08.1
bit 3
bit 3
bit 3
bit 3
bit 3
bit 3
bit 3
bit 3
Dummy
VBlank
Start bit 8
(see note)
bit 3
CRT Controller Index
Dummy HBlank End
Preset Row Scan
Dummy
VRTC Start
bit 8
(see note)
bit 2
bit 2
bit 2
bit 2
bit 2
bit 2
bit 2
bit 2
bit 2
Hardware Functional Specification
bit 1
bit 1
bit 1
bit 1
bit 1
bit 1
bit 1
bit 1
VDisplay
End
Position bit 8
bit 1
bit 0
bit 0
bit 0
bit 0
bit 0
bit 0
bit 0
bit 0
Dummy
VTotal End
bit 8
(see note)
bit 0
SP1-71