BiFrost Multicolour engine.

[einar]

I attached the snapshot I made after I entered the code for the loader

This snapshot doesn't have anything loaded on memory. Neither BIFROST*, tiles, or any ZX BASIC program. There's just the loader program, nothing else.

Try this: delete line 50 from the loader, then run it. It will load everything in memory without executing. Afterwards, take another snapshot and put it here, so I can analyze it and find out what's wrong.

Or perhaps you better describe exactly what you are doing, step by step, so I can identify what you are doing wrong.