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

RGB + Hsync Vsync. the adapter should contain 5inputs the one youl listed looks like 3 inputs

RGB + Hsync Vsync. the adapter should contain 5inputs the one youl listed looks like 3 inputs

You might be able to pick up an Extron VS 304 for next to nothing. They could handle 15kHz RGBHV and scale to VGA.

https://www.extron.com/product/dvs304

RGBHV2VGA is a bit more expensive $7-$8

nice hint as i saw on ebay its common in usa but im from europe

Hi Doug,

He needs to change pixel rate, which requires electronics. I suspect the cable in the photo is unlikely to do that, there's no power source connection in the photo (there may be power delivered through a VGA connector, but I believe it's in the direction from PC->monitor, not monitor->PC).

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.