Hello I am thinking of giving myself a challenge and making a small pong type console using a cerb 40 board that I have spare. I want to do this for the lowest cost possible and so I was thinking of doing the VGA code and wiring myself.
From what I can tell I need to be able to clock at about 25mhz to update the VGA sync and output the columns and rows correctly. Memory shouldnt be an issue as the main background will be green (no memory there) and there will be some basic rectangles to make up the pong scenery which I can calculate at runtime.
My concern is that the although I have the clock speed on the cerb would It will struggle to be consistent? Would RLP code be reliable enough to ensure a smooth output at 25Mhz?
Also does anyone know what will happen if I dont manage to get a fast enough speed? I cant work out if its defined by the VSync, HSync toggles or wether the tv has an internal refresh clock
It is basically one of these https://www.google.co.uk/search?q=TV+sports+pong&hl=en&safe=off&source=lnms&tbm=isch&sa=X&ei=hXZdUay6Dc3ZPNTvgOAD&ved=0CAcQ_AUoAQ&biw=983&bih=496#imgrc=nxGAZgcXcMppqM%3A%3BDlTPPM8tup-12M%3Bhttp%3A%2F%2Fwww.pong-picture-page.de%2Fcatalog%2Fimages%2FLloyds%2520TV%2520Sports%2520E-813%2520Color%25204%2520Player_www.JPG%3Bhttp%3A%2F%2Fwww.pong-picture-page.de%2Fcatalog%2Findex.php%3Fmanufacturers_id%3D83%3B622%3B448