CRT控制器寄存器列表 |
寄存器名称 |
索引号 (Hex) |
写端口 ( EGA/VGA/TVGA) |
读端口 (EGA) |
读端口 (VGA/TVGA) |
地址寄存器 |
-- |
3D5H/3B5H |
|
3D4H/3B5H |
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 |
偏移/逻辑屏宽度 |
13H |
3D5H/3B5H |
|
3D5H/3B5H |
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 | | |