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by GuruGary
13 May 2014 22:27
Forum: DOS Batch Forum
Topic: Attempt to catch arrow keystrokes
Replies: 21
Views: 11629

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...