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CRT控制器寄存器列表
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| 寄存器名称 |
索引号
(Hex)
|
写端口
( EGA／VGA／TVGA)
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读端口
(EGA)
|
读端口
(VGA／TVGA)
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| 地址寄存器 |
--
|
3D5H／3B5H
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|
3D4H／3B5H
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| 水平扫描总时间 |
00H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 水平显示结束 |
01H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 水平消隐开始 |
02H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 水平消隐结束 |
03H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 水平回扫开始 |
04H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 水平回扫结束 |
05H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 垂直扫描总时间 |
06H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 溢出 |
07H
|
|
|
3D5H／3B5H
|
| 行扫描预置 |
08H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 最大扫描行 |
09H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 光标起始 |
0AH
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 光标结束 |
0BH
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 显存起始地址(高) |
0CH
|
3D5H／3B5H
|
3D5H／3B5H
|
3D5H／3B5H
|
| 显存起始地址(低) |
0DH
|
3D5H／3B5H
|
3D5H／3B5H
|
3D5H／3B5H
|
| 光标位置(高位) |
0EH
|
3D5H／3B5H
|
3D5H／3B5H
|
3D5H／3B5H
|
| 光标位置(低位) |
0FH
|
3D5H／3B5H
|
3D5H／3B5H
|
3D5H／3B5H
|
| 垂直回扫开始 |
10H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 垂直回扫结束 |
11H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 光笔地址〔高位) |
10H
|
仅EGA有效只读
|
3D5H／3B5H
|
3D5H／3B5H
|
| 光笔地址(低位) |
11H
|
仅EGA有效只读
|
3D5H／3B5H
|
3D5H／3B5H
|
| 垂直显示结束 |
12H
|
3D5H／3B5H
|
|
3D5H／3B5H
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| 偏移/逻辑屏宽度 |
13H
|
3D5H／3B5H
|
|
3D5H／3B5H
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| 下划线位置 |
14H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 垂直消隐开始 |
15H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 垂直消隐结束 |
16H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 模式控制 |
17H
|
3D5H／3B5H
|
|
3D5H／3B5H
|
| 行比较 |
18H
|
3D5H／3B5H
|
|
3D5H／3B5H |
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