mcleod_ideafix has developed a video interface for the ZX Spectrum using a TSM9928. Now it is possible to use the VDP capabilities from the Spectrum in a dual screen environment. The video output of this interface can show an MSX game (previously adapted) while the Spectrum shows debugging messages.
In
this article mcleod_ideafix explains in detail how it works. Demonstrated as well is some software ported from MSX to Spectrum (Snow Climber by Vincent van Dam).
This interface can also be used to develop MSX and Spectrum software in parallel, cross-platform so to say.
Relevant link:
ZX Projects
