SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 118

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

BIOS Functional Specification
SP2-12
Function 04h - Read Lightpen Position (Unsupported On VGA)
Function 05h - Select Active Display Page
Function 06h - Scroll Active Page Up
Function 07h - Scroll Active Page Down
Function 08h - Read Character/attribute at Cursor Position
Input:
Return:
Input:
Return:
Input:
Return:
Destroyed:AX, SI, DI, (and DS if text modes)
Input:
Return:
Input:
Return:
Destroyed:AX, SI, DI, (and DS if text modes)
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
AH=04h
AH
AH=05h
AL
n/a
AH=06h
AL
BH
CX
DX
n/a
AH=07h
AL
BH
CX
DX
n/a
AH=08h
BH
AL
AH
Read Lightpen Position
Lightpen status (0=none, 1=active)
If AH=1 then:
Select Active Display Page
New page number
Scroll Active Page Up
Lines to scroll (0=blank window)
New line(s) attribute
Top-left corner of scroll window
Bottom-right corner of scroll window
Scroll Active Page Down
Lines to scroll (0=blank window)
New line(s) attribute
Top-left corner of scroll window
Bottom-right corner of scroll window
Read Character/attribute at Cursor Position
Page number
Character read
Attribute read
BX - Pixel column
CX - Scan line
DX - Character row/column
X15-SP-002-03
412-1.0
SPC8104