SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 83

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

Memory Mode Reg. (Index 04h)
Horizontal Total (Index 00h)
Horizontal Display Enable (Index 01h)
Horizontal Blanking Start (Index 02h)
Horizontal Blank End (Index 03h)
Horizontal Retrace Start (Index 04h)
Horizontal Retrace End (Index 05h)
Vertical Total End (Index 06h)
CRTC Overflow (Index 07h)
Maximum Scan Line (Index 09h)
Cursor Start (Index 0Ah)
Cursor End (Index 0Bh)
Vertical Retrace Start (Index 10h)
VRTC End (Index 11h)
SPC8104
CRTC Registers (3D4h, 3D5h)
bit 4
bit 1
bits 0,2,3,5,6,7
bit 5
bit 6
bit 7
bits 5,6
bits 0-3
412-1.0
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Shift-4
Read / write only. No other effect in hardware.
Ext. Mem.
Read only as 1. Always 256kbytes of memory.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
V.Blank Start 9
Read / write only. No other effect in hardware.
Line Compare 9
Read / write only. No other effect in hardware.
IBM Test Bit
Deleted.
Cursor Skew
Read / write only. No other effect in hardware.
Read / write only. No other effect in hardware.
VRTC End
Read / write only. No other effect in hardware.
X15-SP-001-08.1
Hardware Functional Specification
SP1-57