參數(shù)資料
型號: SIS300
廠商: SILICON INTEGRATED SYSTEMS CORP
元件分類: 圖形處理器
英文描述: GRAPHICS PROCESSOR, PBGA365
封裝: 27 X 27 MM, BGA-365
文件頁數(shù): 73/115頁
文件大?。?/td> 2426K
代理商: SIS300
SiS300 2D/3D/Video/DVD Accelerator
Preliminary V0.3 March 23, 1999
52
Silicon Integrated Systems Corporation
5.2.28 CR1C: CRT VERTICAL COUNTER READ BACK
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 1Ch
Default:
xxh
D[7:0]
CRT vertical counter bit[7:0]
5.2.29 CR1D: CRT OVERFLOW COUNTER READ BACK
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 1Dh
Default:
xxh
D[7:5]
Reserved
D4
CRT horizontal counter bit 8
D3
Reserved
D[2:0]
CRT vertical counter bit[10:8]
Note: The horizontal and vertical counter value will be latched when read register CR20.
So the three registers value should be read after read CR20.
5.2.30 CR1E: EXTENDED SIGNATURE READ-BACK REGISTER 2
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 1Eh
Default:
xxh
D[7:0]
Signature read-back bit[23:16]
5.2.31 CR20: CRT COUNTER TRIGGER PORT
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 20h
Default:
xxh
D[7:0]
Reserved
5.2.32 CR24: ATTRIBUTE CONTROLLER TOGGLE READ-BACK REGISTER
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 24h
Default:
xxh
D7
Attribute Controller Toggle
D[6:0]
Reserved
5.2.33 CR26: ATTRIBUTE CONTROLLER INDEX READ-BACK REGISTER
Register Type: Read Only
Read/Write Port:
3B5/3D5, Index 26h
Default:
xxh
D[7:6]
Reserved
D5
Video Enable
D[4:0]
Attribute Controller Index bit[8:4]
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