Hello, I am new to the forum.
I originally had an arcade vga3000 card installed in my sega astro city via jpac and i run windows xp 64 bit. I decided to make the switch to the crt emudriver after reading several posts about users saying it's much better. I decided to get myself a Radeon HD4850 as it was listed as supported in the 9.3 section of drivers for windows xp 64 bit. I have done a complete reinstall as fresh of windows xp, installed all chipset drivers and also direct x etc. I have the yellow explanation mark coming up for the standard vga card in device manager so i know there is no old driver files lurking around. I proceeded to install the 1.2a 9.3 driver set for windows xp64. When i accept the user agreement and hit yes i immediately get the message "setup did not find a driver compatible with your current hardware or operating system, setup will now exit." It then gives me the option to restart or continue in windows. I have also tried installing the driver through add new hardware and also device manager pointing the folder to the driver folder. Nothing works, i have managed to install soft 15hz ok and this gives me a stable image and the resolutions i could get with arcade vga. I hope someone can direct me in the right way as how to sort this, i do hope my card is compatable as i bought it new for £50. Any help would be greatly appreciated.