A while ago, I whipped up a cheap solution to get the IIGS's RGB to output and upscale to VGA using the GBS 8200, following @jcm-1 's tutorial:
It was SO much better than the crap composite output, but not great. Then recently, I saw on FB that there is a modification you can make to the GBS using a ESP8266 Arduino that provides alternative firmware (and a handy wifi-based control interface).
The improvement is substantial. I'm currently outputting to a 17" VGA LCD @ 1280x960. It's not as excellent as the RGBtoHDMI, but for about *maybe* $40 in parts it's freaking amazing. Truly useable.
Here's the Github for the gbs-control project: https://github.com/ramapcsx2/gbs-control
Here's a good IIGS-specific walkthrough: https://jbretro.wordpress.com/2020/10/23/gbs-control-8200-iigs-scaler-masterclass/
Here's a general overview build / setup video:
It was SO much better than the crap composite output, but not great. Then recently, I saw on FB that there is a modification you can make to the GBS using a ESP8266 Arduino that provides alternative firmware (and a handy wifi-based control interface).
The improvement is substantial. I'm currently outputting to a 17" VGA LCD @ 1280x960. It's not as excellent as the RGBtoHDMI, but for about *maybe* $40 in parts it's freaking amazing. Truly useable.
Here's the Github for the gbs-control project: https://github.com/ramapcsx2/gbs-control
Here's a good IIGS-specific walkthrough: https://jbretro.wordpress.com/2020/10/23/gbs-control-8200-iigs-scaler-masterclass/
Here's a general overview build / setup video:
