1、汇编语言编程与x86处理器架构全面解析

汇编语言编程与x86处理器架构全面解析

1. ASCII控制字符与键盘扫描码

1.1 ASCII控制字符

当按下控制键组合时，会生成对应的ASCII码。这些助记符和描述涉及用于屏幕和打印机格式化以及数据通信的ASCII功能。以下是按下ALT键并按每个字符时产生的十六进制扫描码：
| ASCII Code | Ctrl- Mnemonic | Description | ASCII Code | Ctrl- Mnemonic | Description |
| — | — | — | — | — | — |
| 00 | | NUL | Null character | 10 | Ctrl - P | DLE | Data link escape |
| 01 | Ctrl - A | SOH | Start of header | 11 | Ctrl - Q | DC1 | Device control 1 |
| 02 | Ctrl - B | STX | Start of text | 12 | Ctrl - R | DC2 | Device control 2 |
| 03 | Ctrl - C | ETX | End of text | 13 | Ctrl - S | DC3 | Device control 3 |
| 04 | Ctrl - D | EOT | End of transmission | 14 | Ctrl - T | DC4 | Device control 4 |
| 05 | Ctrl - E | ENQ | Enquiry | 15 | Ctrl - U |