Spectrum Computing

Hi there
I cannot have games like Buzzsaw or old tower working on Marvin (there is no rainbow grafix showing)
... Is there a special set up I am not aware of, or is it just not possible?

It’s not usually an option that you turn on or off. It’s whether emulation of the speccy is accurate or not.

It’s possible to do a really simplified emulation that only updates the screen once per frame, and still most games would run ok.

But any game that updates the screen with precise timings while chasing the video “raster” across the screen needs precise emulation of how those video timings work in the hardware.

Sometimes, depending on how you architected the emulator, it might be easier to start again rather than add timing accuracy afterwards.

I can't remember if Marvin has a 'colour-accurate timing' setting or not. I thought it did, but you have to look for it in the settings. I vaguely remember it isn't enabled by default. Failing that, there's the 'Dim Sun' edition of Buzzsaw+, which uses ordinary colour graphics:
https://spectrumcomputing.co.uk/entry/3 ... un_Edition