zxian v12 is released. zxian is a ZX Spectrum emulator written in C, using SDL2 for graphics, input/output, and audio. As with my other projects, the source is available for download. I built it with Visual Studio Community 2019 (with C++ core features installed).

zxian v12 Changelog:
v12 - CPU microcode fix: R register behaviour; this unfreezes some games which rely on R for timing, like Defender of the Crown. CPU microcode fix: DD/FD prefix opcodes fall-through to unprefixed
v11 - added support for saving and loading state; added a UI which allows memory modification (pokes)

Download: zxian v12
Source: Here