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- 13 May 2014 22:27
- Forum: DOS Batch Forum
- Topic: Attempt to catch arrow keystrokes
- Replies: 21
- Views: 24055
Re: Attempt to catch arrow keystrokes
The reason for the "double buffer" is because the arrow keys are "extended" keys. When you press a key on the keyboard, it sends a "scan code" which is a single-byte value (0-255). When they added additional keys to the keyboard, there were more than 255 values that cou...