Core loads to a garbled screen if ECS if set to Off

[mario-64]

Issue: Core loads to a garbled screen if ECS if set to Off (most INTV games don't use ECS)

Steps to reproduce:

1. Load the core
2. Access OSD and set ECS to off
3. Save settings
4. Reboot MiSTer
5. From now on when you load the core you'll see the following garbled screen
   

Expected behavior: Core loads without a garbled screen when ECS is set to off
Note that the issue is present regardless if using boot.rom or the split BIOS files

[jmf866]

I'm pretty sure the original console does that when powered on without a game cartridge inserted.

[mario-64]

I'm pretty sure the original console does that when powered on without a game cartridge inserted.

I don't recall my INTV II doing that but let me confirm.

[KremlingKuthroat19]

I was just testing this feature. It appears that leaving the ECS off is the better default solution as it breaks some non-ECS games. For example, Centipede, Congo Bongo, Dig Dug, and Pac-Man are completely broken with ECS enabled.

[thehughhefner]

Maybe a quirk is needed here? How many games are we talking about here?