Editing Apple I (section)

=== Video Display System ===
The Apple I's video system was revolutionary for its time, providing a complete TV-compatible display:<ref>{{cite web |url=https://www.apple1registry.com/en/theapple1.html |title=The Apple-1 |publisher=Apple-1 Registry |access-date=2025-01-25}}</ref>

* '''Character matrix:''' 40 columns × 24 rows (960 characters total)
* '''Character set:''' 7-bit ASCII, uppercase letters and symbols only
* '''Display timing:''' 60 Hz vertical, 15.75 kHz horizontal (NTSC compatible)
* '''Video output:''' 1V p-p composite video, positive sync
* '''Character generator:''' 5×7 dot matrix in 7×8 character cell
* '''Memory usage:''' 960 bytes for screen buffer ($D000–$D3BF)