SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 116

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

3.0
The SPC8104F0A is a single chip LCD video controller based on VGA architecture. VGA stan-
dard mode functionality is supported using standard IBM VGA parameters; the exception to this is
mode 13h which is not supported.
The target market for this device is specialized products requiring VGA at less than 256 colors.
The ability to run all 16 color VGA software on a 640x480 LCD panel display is the major design
consideration, therefore the BIOS must perform the same functions that the IBM VGA BIOS per-
forms within the limitations of the SPC8104F0A. In addition, the BIOS is extended to take advan-
tage of the hardware enhancements in the SPC8104F0A.
The BIOS is divided into 3 major sections: the main BIOS, the VESA Extensions and the Sollex
Extensions. It requires 32 KB of EPROM space decoded by the system board.
3.1
The main BIOS contains the core VGA compatible information. It requires 24 KB of the total 32
KB of EPROM space. This main BIOS is responsible for the initialization of the chip and for per-
forming the IBM compatible function calls. It contains the Video Parameter Tables and the Char-
acter Tables.
3.2
The VESA Extensions are found in the last 8 KB of the 32 KB. This contains the VESA compatible
functions as defined by the Video Electronics Standards Association. At time of printing the BIOS
conforms to the Video BIOS Extensions Standard 1.2. These VESA functions are responsible for
setting non-IBM modes and supplying functions for mode information. More information on VESA
can be obtained by contacting the Video Electronics Standards Association located in San Jose,
CA.
3.3
The Sollex Extensions are defined by Seiko Epson Corporation to augment the functionality of the
BIOS to include panel and power down functions. This also resides in the last 8 KB. More infor-
mation on Sollex can be found in the SOLLEX Specification Drawing Office No. S03-SP-001-xx.
BIOS Functional Specification
SP2-10
OVERVIEW DESCRIPTION
Main BIOS
VESA Extensions
Sollex Extensions
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
X15-SP-002-03
412-1.0
SPC8104