Spectrum Computing

I would have thought at the time, the Spectrum 48K Rubber Key was the most compatible Spectrum ever as it run everything available at the time. Interestingly, this isn't entirely true either as there were several ULA and board revisions in the rubber-key models. In particular, the change from issue...

problem denial will eventually lead to the software written for the Next's unexpanded mode but not working on the real ZX i fear. And what relation all this peripherals stuff has to the CPU emulation accuracy? Also please read my recent answers. Nobody has denied there is a difference in the result...

Nobody said it ought to be the NEC Z80. Well, not me surely. Problem is, the Next fails to reproduce ANY real Z80 variant . Just as any real Z80 variant fails to reproduce the results of other real Z80 variants. I think you are perhaps unnecessarily hung-up on intricate undocumented details that di...