Colecovision

MSX is the default core. But all I get is blue screen saying Basic with computer prompt.

I confirmed added

Machines

Databases

Folders to bios folder.

So I ran it to blue screen.

Select + X to get intro Retroarch.

Set Core Options, Machine Type Colecovision (Restart)

Close Content.

Select Core (MSX)

Select Content (A Coleco ROM)

and it works.

Event after reboot.

Something must have gotten written.