Vga for vintage computers

[MrDave]

Het guys i figured out a cool hack to get your vintage computer to use a vga monitor..

I took out the rf circuit out of my coco2 and was able to restore the video using the luminance (y) wire coming off the vdg , and using a inexpensive composite to vgs converter (<25$ ) on amazon my computer now has adjustable color ! And a much clearer picture than rf !

[MrDave]

Having open vga wires ( r g b ) its easy to manipulate them..this is still a monochrome ( black and white )signal leaving my coco2

[MrDave]

Im still having fun hacking the vga colors using a binary counter counting the hsync pulses..

 This is a pretty clear monochrome image on my coco2

[MHaensel]

Very cool!

[Texas Tandy restorations]

now to figure trs-80 model 3 monochrome to composite to vga conversion that doesn't cost 300$ (yes I know someone did one already, which is far more than what the machine is worth)

 

Edited June 25, 2020 by Texas Tandy restorations

[MrDave]

Well i used a composite - vga converter from amazon for 20$ ..there must be lots of vga monitors around.. this can be done under 50$ !