_tyrell_ has posted a bit of news on the status of DCSpeccyalK in this DCEmu forum post, so here’s the latest on the emulators progress:

– Rewrote the rendering code using vram_s (unstability problems, which were due to the DMA transfers, are now fixed forever)

– Correct line-by-line border emulation (Vectron for example is ok now).

I’m also adding this feature: in the next version, it’ll possible to save compressed memory snapshots. The emu will offer several slots for loading/saving games or BASIC programs you’ve written using the DC keyboard.

I have found a library (libspectrum) by Philip Kendall, which would allow me, in theory, to add support for the TZX file format.