mine looks like that from the back - it has a 9pin input:

this pinout works with the monitor:

not sure what you can do with your 15pin input - maybe follow the above and hope it works 😀

No, only one pin from the table corresponds with mine real pinout - analog red=TTL ground. Other pins are very different. E.g. analog green ground=ttl hsync and analog red ground = ttl vsync. Other (RGB bits 0 & 1) are still unknown.

It may use the same pinout as the NEC Multisync 3D, another monitor with HD-15 VGA input. but also supports TTL video modes.

http://www.vcfed.org/forum/showthread.php?241 … on-VGA-Adapters

NJRoadfan, no, it's definitely not the valid pinout for this monitor.

Interesting monitor! 😀
I'm curious, was it made for CGA/EGA (any hints somewhere ?) or was it a generic analogue/TTL RGB monitor ?
Other computers such as the Sharp MZ 800 or Commodore 128 also had RGB out.
I don't know about the former, but the 128 uses RGBI, as far as I know.

^ my version of the monitor works with CGA, EGA, VGA (up to 800x600 progressive IIRC) and analog 15khz

The colour & synchro pinout of the 15-pin connector in TTL mode is this:
1=GND
2=R'
3=R
4,5=nc
6=VSYNC
7=HSYNC
8=nc
9=key
10=G'
11=B'
12=nc
13=G
14=B
15=nc
Some not connected pins may be really used, but their purposes are still unknown for me.

As result, I have got this quality of text-modes on the monitor:
EGA:

CGA:

MDA:

The picture size is normal only in CGA and VGA modes (VGA - without any adapter, with direct connection to a modern video card). The horizontal size switch on the case is working only in VGA mode.
VGA (H SIZE=OFF):

VGA (H SIZE=ON):

It even can work with Windows 98. 🤣
https://www.youtube.com/watch?v=jIOFSOYjFzo

Watch without sound, as there are English subtitles.

Cool! Thanks for video! 😁

ATauenis wrote:

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The picture size is normal only in CGA and VGA modes (VGA - without any adapter, with direct connection to a modern video card).

Maybe that's also because of this: VGA uses 720x400. CGA uses 320x200 or 640x200, but gets doubled on VGA cards to 320x400 and 640x400.
On the other hand, EGA is more like Hercules. Both use 350 lines. That's why some EGA/VGA cards can use Hercules (TTL) monitors, too:
The 640x350 EGA mode (mono) and the 720x348 Hercules/MDA mode is within the scope of these monitors.
https://en.wikipedia.org/wiki/VGA-compatible_text_mode

No, I have meaning "CGA on CGA card" and "VGA on VGA cards". 😀 The monitor have enlarged picture only when a EGA card (like one from video 😀 ) is working in 350 line modes (text or graphics). In 200 line modes and in VGA-Analog modes the picture is normal.