Changes
/* Z80 CPU */
*[https://www.cpc-power.com/index.php?page=detail&num=12883 Z80 Full Test] [https://www.cpc-power.com/index.php?page=detail&num=12881 Z80 Doc Test] [https://www.cpc-power.com/index.php?page=detail&num=12882 Z80 Flags Test] [https://www.cpc-power.com/index.php?page=detail&num=12880 Z80 Doc Flags Test] [https://www.cpc-power.com/index.php?page=detail&num=12884 Z80 MEMPTR Test] [https://www.cpc-power.com/index.php?page=detail&num=12879 Z80 CCF Test]
*[https://www.cpc-power.com/index.php?page=detail&num=298 Arkanoid] [https://www.cpc-power.com/index.php?page=detail&num=1299 Light Corridor] Z80 IM2 usage, Z80 useless instruction prefixes
*[https://wikiti.brandonw.net/?title=Z80_Instruction_Set Z80 instruction set] [https://zx-pk.ru/attachment.php?attachmentid=2989&d=1143656567 Z80 MEMPTR (aka WZ) internal register] [https://github.com/hoglet67/Z80Decoder/wiki/Undocumented-Flags Even weirder Z80 behaviour] [https://zxe.io/software/Z80/documentation/latest/Thanks.html To get to the bottom of it] How the Z80 behaves*[https://floooh.github.io/2021/12/06/z80-instruction-timing.html Z80 T-state timings] Useful documentation for Z80 CPU implementers[https://baltazarstudios.com/zilog-z80-undocumented-behavior/ Other source about T-state timings] Ultra accurate timing behaviour
== Diagnostics ==
