SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 129

• Manufacturer Part Number: SPC8106
• Description: LCD/CRT VGA CONTROLLER
• Manufacturer: S-MOS Systems

Sequencer Registers (3C4h, 3C5h)
Clocking Mode Reg. (Index 01h)
bit 4
bit 2
bit 1
bit 0
Memory Mode Reg. (Index 04h)
bit 1
CRTC Registers (3D4h, 3D5h)
Horizontal Total (Index 00h)
Horizontal Display Enable (Index 01h)
Horizontal Blanking Start (Index 02h)
Horizontal Blank End (Index 03h)
bits7-5
bits 4-0
Horizontal Retrace Start (Index 04h)
SPC8106
Horizontal Retrace End (Index 05h)
411-1.0
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Shift-4
Read/write only. No other effect in hardware.
Shift-Load
Read/write only. No other effect in hardware.
CPU Bandwidth
Read/write only. No other effect in hardware.
8/9 Dot Select
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT modes, this bit selects 8 or 9 dot mode.
For dual display mode the 9th bit is stripped by hardware.
External Mem.
Read only as 1. Always 256kbytes of memory.
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT or Doublescan modes, normal VGA functionality.
For LCD/CRT or Doublescan modes, if AUX[00] bit 0 = 1, this register accesses the LCD Horizontal
Panel Size register.
For LCD-only mode (not Doublescan) and AUX[00] bit 0 = 0, this register is read/write only. No
other effect in hardware.
For CRT or Doublescan modes, AUX[00] bit 0 = 0, normal VGA function.
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT or Doublescan modes, normal VGA functionality.
Read/write only. No other effect in hardware.
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT or Doublescan modes, normal VGA functionality.
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT or Doublescan modes, normal VGA functionality.
For LCD-only modes (AUX[0B] bits 1,0 = 01) - Read/write only. No other effect in hardware.
For CRT or Doublescan modes, normal VGA functionality.
X12-SP-001-07
Hardware Functional Specification
SP1-87