Solved making a monochrome video cable to run a lcd monitor

November 14, 2014 at 12:19:35
Specs: Windows 7
I have a MDA video card and need to wire it to a lcd monitor. I have a H=sync, V-sync, ground and a video output from the video board. What pins do I connect to make the lcd monitor display only one color.

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#1
November 14, 2014 at 12:33:00
You need more than just a cable to do this. The output signals from an MDA card are totally different from those expected by a VGA monitor. You either need to be very good with electronics to create the appropriate convertor or else buy one. They are not cheap - it's not as if there is much demand for them.

You'd be better of looking for an old MDA monitor on eBay.


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#2
November 15, 2014 at 00:50:40
✔ Best Answer
As described in Pocket PCRef, third edition, the video card pinout for HGC/MDA is:

1 & 2. . . . . . .Ground
3, 4, 5. . . . . .Not used
6. . . . . . . . .+ Intensity
7. . . . . . . . .+ Video
8. . . . . . . . .+ Horizontal drive
9. . . . . . . . .- Vertical drive

The pinout for a monochrom VGA connection is:

1. . . . .Not used
2. . . . .Monochrome video
3. . . . .Not used
4. . . . .Not used
5. . . . .Ground
6. . . . .Key
7. . . . .Monochrome ground
8. . . . .Not used
9. . . . .No connection
10. . . .Horizontal sync groiund
11. . . .Not used
12. . . .Vertical sync ground
13. . . .Horizontal sync
14. . . .Vertical sync
15. . . .Not used

I doubt you can do anything with that but if you want to experiment that'd be the place to start. Of course you might end up ruining the monitor or card. Probably best to find an already made adapter or 9-pin monochrome monitor, as already mentioned.


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#3
November 15, 2014 at 01:39:01
I would strongly recommend that you do not make random experiments with card and monitor. There is a strong chance that both will end up broken (particularly the monitor).

I repeat - there is no way that you can do this just by using a cable. You must have an active electronic circuit to convert the signals. To make an analogy; try connecting an IDE disk drive to a SATA controller using just a cable.


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