cga to vga converter uPython

Are you looking for something like this RGB to VGA adapter? They cost about $1.

I think they mean the old IBMPC Color Graphics Array RGBI TTL output

https://en.wikipedia.org/wiki/Color_Graphics_Adapter#DE-9_connector_for_RGBI_monitor

Probably just ignoring the intensity bit in that case.

Perhaps something more like this then:

https://www.amazon.co.uk/Mcbazel-Arcade-Converter-Monitor-Projector-Black/dp/B078ZDTLBJ/ref=sr_1_1

That looks like it will do the job!

i saw that cable before and i predict its from vga to rgb not from rgb to vga

solutions what i found as standalone products:

- GBS2019 Xvga box but was highly delayed when i first searched it

- getting a 15khz monitor, i got one and not working possibly the 63Hz vertical sync messes it up

- Extron VS 304 looks documented like can work, but at the rgbhv place the resolution was not really documented i got this info here from beacon_dave

rlaci said:

i saw that cable before and i predict its from vga to rgb not from rgb to vga

It's a bidirectional cable but passive.

AV installs often ran RGBHV over 5 coax cables whereas PC's used the 15pin Hi Density 'D' type connector with additional I2C DDC data line. Early multisync monitors used to come with the 5x BNC as default as well. These type of cables were common place to convert between the two physical formats.

i saw a DVS 406 unit in europe, is it better or worse newer older equipment?

i hope it does not mean the signal just passes throught and no processing done for the output signal :D

• Scales composite video, S-video, component video, and optional SDI inputs with RGBHV pass-through

Similar unit, just more inputs and has the pass through functionality. Looks like it is optimised for PAL / NTSC video though but that might just be the sales pitch.

The pass through is an input loop feature that allows you to insert the device into an existing signal path without interrupting it. The scaling happens between the inputs on the left and the outputs on the right.

I don't think either of these boxes are much use to you if you definitely have the original CGA TTL level signals, unless you were to convert the levels first.

The board I linked to on Amazon, looks a closer match for your needs, as it looks like it has been designed for the 1980s CGA/EGA TTL level signals. Looks like it is aimed at keeping some of the early video gaming systems alive with modern displays. 

Some more to check out

https://www.serdashop.com/MCE2VGA

( https://github.com/lfantoniosi/mce2vga )

https://www.serdashop.com/MCE2HDMI

this card is documented that not working with industrial equipment even if its advertised that it should, i bought one similiar card recently and nothing

How about this R-Pi Zero + CPLD based one:

https://github.com/hoglet67/RGBtoHDMI/wiki

You would need an HDMI monitor or a HDMI to VGA adapter.

However it has options to create custom timing profiles or alternatively the design is there to roll your own.

Yeah i started it because i think its doable but as using my logic analyzer and looking at different boards and different codes, the signal processing looks pretty erratic for me and the stated cycle clocks are usually different in reality as in theory

Yeah i started it because i think its doable but as using my logic analyzer and looking at different boards and different codes, the signal processing looks pretty erratic for me and the stated cycle clocks are usually different in reality as in theory