Talk:IBM Monochrome Display Adapter
What pin numbers? Shown is the end of the connector without any numbering.
Pin 7 = Video?
What is the meaning of Pin 7 ('video')? I.E. What does this mean electrically? I understand the 'intensity' represents how bright the screen gets per pixel and ground is electrical ground and horizontal sync is used for making sure the pixels displayed line up the right way, but what is the 'meaning' of 'video' electrically?
I think this is the answer you're looking for: The video line carries a digital (on or off) signal indicating if the pixel was on or off. The intensity line made the pixel brighter than normal. There were three levels of pixel brightness - off, on, and on with intensity. The intensity signal just made the pixel brighter - if the video signal did not call for the monitor to paint the pixel on, the intensity signal had no significance.
In electronic parlance the name "video" on a signal line is often used to show that the line is carrying picture information - I've also seen laser printer circuit diagrams with the signal to the laser module named "video". 22.214.171.124 (talk) 19:42, 14 April 2008 (UTC)
- All signals are using TTL levels. So 0 V on video pin means black, 5 V means gray or white, depending on pin 6 intensity.
video intensity screen pin 7 pin 6 0 V 0 V black 0 V 5 V black 5 V 0 V grey 5 V 5 V white
- --Rôtkæppchen68 10:37, 7 November 2014 (UTC)
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