Many thanks to the following individuals (in alphabetical order):

* Akimov, Vadim (lvd)
    For testing the library on many different platforms and CPU architectures.
* Anisimov, Alexey (SoftLight)
    For testing the `ccf/scf` instructions on real hardware [1].
* azesmbog
    1. For validating tests on real hardware [2.1].
    2. For discovering the unstable behavior of the `ccf/scf` instructions.
    3. For testing the `ccf/scf` instructions on real hardware [1, 3].
    4. For his invaluable help.
* Banks, David (hoglet)
    1. For deciphering the additional flag changes of the block instructions
       [4.1, 4.2, 5].
    2. For his research on the `ccf/scf` instructions [5, 6].
* Beliansky, Anatoly (Tolik_Trek)
    For validating tests on real hardware [2.2].
* Bobrowski, Jan
    For fixing "Z80 Full Instruction Set Exerciser for Spectrum" [7].
* boo_boo
    For deciphering the behavior of MEMPTR [8, 9, 10, 11].
* Brady, Stuart
    For his research on the `ccf/scf` instructions [12].
* Brewer, Tony
    1. For his research on the special RESET [4.3, 13].
    2. For helping to decipher the additional flag changes of the block
       instructions [4].
    3. For conducting low-level tests on real hardware [4].
    4. For helping me to test different undocumented behaviors of the Zilog Z80.
    5. For discovering that the `DD/FD` prefixes affect the behavior of the
       `ccf/scf` instructions [4.4].
* Bystrov, Dmitry (Alone Coder)
    For validating tests on real hardware [2.2].
* Chaikin, Mikhail (P321)
    For testing the `ccf/scf` instructions on real hardware [1].
* Chandler, Richard
    1. For his corrections to the documentation.
    2. For validating tests on real hardware [14].
* Chunin, Roman (CHRV)
    For testing the behavior of MEMPTR on real hardware [8, 9, 10, 11].
* Conway, Simon (BadBeard)
    For validating "Z80 Test Suite" on several Z80 clones [15].
* Cooke, Simon
    For discovering how the `out (c),0` instruction behaves on the Zilog Z80
    CMOS [16].
* Cringle, Frank D.
    For writing "Z80 Instruction Set Exerciser" [17].
* Devic, Goran
    For his research on undocumented behaviors of the Z80 CPU [18].
* Dmitriev, Dmitry (DDp)
    For testing the `ccf/scf` instructions on real hardware [3].
* Dunn, Paul (ZXDunny)
    For his corrections to the documentation.
* Equinox
    For his corrections to the documentation.
* Flammenkamp, Achim
    For his article on Z80 interrupts [19].
* Gimeno Fortea, Pedro
    1. For his research work [20].
    2. For writing the first-ever ZX Spectrum emulator [21, 22].
* Greenway, Ian
    For testing the `ccf/scf` instructions on real hardware [12, 23].
* Harston, Jonathan Graham
    1. For his research work.
    2. For his technical documents about the Zilog Z80 [24, 25, 26].
    3. For porting "Z80 Instruction Set Exerciser" to the ZX Spectrum [27].
* Helcmanovsky, Peter (Ped7g)
    1. For helping me to write "IN-MEMPTR".
    2. For writing "Z80 Block Flags Test" [2, 28].
    3. For writing "Z80 CCF SCF Outcome Stability" [28].
    4. For writing "Z80 INT Skip" [28].
    5. For writing "FDDD2", "Z80 DDFD3", "Z80 IM1 vs JR" and many other tests.
    6. For his research on the unstable behavior of the `ccf/scf` instructions.
    7. For his invaluable help.
* Iborra Debón, Víctor (Eremus)
    For validating tests on real hardware.
* icebear
    For testing the behavior of MEMPTR on real hardware [8, 9, 10, 11].
* ICEknight
    For validating tests on real hardware.
* Ilyichev, Ivan (ivang78)
    For testing the behavior of MEMPTR on real hardware [29].
* Kladov, Vladimir
    For deciphering the behavior of MEMPTR [8, 9, 10, 11].
* Kovrigin, Alexey (creator)
    For testing the `ccf/scf` instructions on real hardware [1, 3].
* Krook, Magnus
    For validating tests on real hardware [2.3].
* London, Matthew (mattinx)
    For validating tests on real hardware.
* Martínez Cantero, Ricardo (Kyp)
    For validating tests on real hardware.
* Molodtsov, Aleksandr
    For testing the behavior of MEMPTR on real hardware [8, 9, 10, 11].
* Nair, Arjun
    For validating tests on real hardware [2].
* Nicolás-González, César
    For helping me to investigate the unstable behavior of the `ccf/scf`
    instructions.
* Ortega Sosa, Sofía
    1. For optimizing the emulator.
    2. For her help and support.
* Owen, Simon
    For the idea of the hooking method used in this emulator.
* Ownby, Matthew P.
    For his research on the state of the registers after POWER-ON [30].
* Rak, Patrik
    1. For improving "Z80 Instruction Set Exerciser for Spectrum" [31].
    2. For deciphering the behavior of the `ccf/scf` instructions [15, 31].
    3. For writing "Zilog Z80 CPU Test Suite" [31, 32].
    4. For his research on the unstable behavior of the `ccf/scf` instructions.
* Rodríguez Jódar, Miguel Ángel (mcleod_ideafix)
    1. For his research on the state of the registers after POWER-ON/RESET [33].
    2. For writing "Z80 Initial Condition Retriever" [33.1].
* Rodríguez Palomino, Mario (r-lyeh)
    For teaching me how emulators work.
* Sainz de Baranda y Romero, Manuel
    For teaching me programming and giving me my first computer.
* Sanarin, Dmitry (haywire)
    For testing the `ccf/scf` instructions on real hardware [3].
* Sánchez Ordiñana, José Ismael (Vaporatorius)
    For validating tests on real hardware [32.1, 34].
* Sapach, Michael (cafedead)
    For writing "CPD-Test" [29].
* Sevillano Mancilla, Marta (TheMartian)
    For validating tests on real hardware [14.1].
* Stevenson, Dave
    1. For testing the special RESET on real hardware [13].
    2. For conducting low-level tests on real hardware [4.5].
* Titov, Andrey (Titus)
    For his research on the `ccf/scf` instructions [1, 3].
* Vasin, Yuriy (goodboy)
    1. For testing the behavior of MEMPTR on real hardware [8, 9, 10, 11, 29].
    2. For testing the `ccf/scf` instructions on real hardware [1, 29].
* Vučenović, Zoran
    For writing the Pascal binding.
* Weissflog, Andre (Floh)
    1. For discovering that the `reti/retn` instructions defer the acceptance of
       the maskable interrupt [35].
    2. For writing the "Visual Z80 Remix" simulator [36].
* Wilkinson, Oli (evolutional)
    For validating tests on real hardware [2].
* Wlodek
    For testing the behavior of MEMPTR on real hardware [8, 9, 10, 11].
* Woodmass, Mark (Woody)
    1. For his invaluable contributions to the emuscene.
    2. For writing "Z80 Test Suite" [15].
    3. For writing "ED777F", "FDDD", "EI48K", "EIHALT", "HALT2INT", "IFF2 Bug",
       "Super HALT Invaders Test" and many other tests.
    4. For his research on the `ccf/scf` instructions [37].
* Young, Sean
    1. For his research work.
    2. For his technical documents about the Zilog Z80 [20, 30, 38].
* Zarubin, Stanislav (JeRrS)
    For testing the `ccf/scf` instructions on real hardware [3, 29].
* ZXGuesser
    For validating tests on real hardware.


References
==========

 1. https://zx-pk.ru/threads/34173-revers-inzhiniring-z80.html
 2. https://spectrumcomputing.co.uk/forums/viewtopic.php?t=6102
    1. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83384#p83384
    2. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83041#p83041
    3. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83157#p83157
 3. https://zx-pk.ru/threads/35936-zagadka-plavayushchikh-flagov-scf-ccf-raskryt
    a!.html
 4. https://stardot.org.uk/forums/viewtopic.php?t=15464
    1. https://stardot.org.uk/forums/viewtopic.php?p=211042#p211042
    2. https://stardot.org.uk/forums/viewtopic.php?p=212021#p212021
    3. https://stardot.org.uk/forums/viewtopic.php?p=357136#p357136
    4. https://stardot.org.uk/forums/viewtopic.php?p=481595#p481595
    5. https://stardot.org.uk/forums/viewtopic.php?p=212360#p212360
 5. Banks, David (2018-08-21). "Undocumented Z80 Flags" rev. 1.0.
    * https://stardot.org.uk/forums/download/file.php?id=39831
    * https://github.com/hoglet67/Z80Decoder/wiki/Undocumented-Flags
 6. https://github.com/hoglet67/Z80Decoder/wiki/Unstable-CCF-SCF-Behaviour
 7. http://wizard.ae.krakow.pl/~jb/qaop/tests.html
 8. https://zxpress.ru/zxnet/zxnet.pc/5909
 9. https://zx-pk.ru/threads/2506-komanda-bit-n-(hl).html
10. https://zx-pk.ru/threads/2586-prosba-realshchikam-ot-emulyatorshchikov.html
11. boo_boo; Kladov, Vladimir (2006-03-29). "MEMPTR, Esoteric Register of the
    Zilog Z80 CPU".
    * https://zx-pk.ru/showpost.php?p=43688
    * https://zx-pk.ru/attachment.php?attachmentid=2984
    * https://zx-pk.ru/showpost.php?p=43800
    * https://zx-pk.ru/attachment.php?attachmentid=2989
12. https://sourceforge.net/p/fuse-emulator/mailman/message/6929573
13. Brewer, Tony (2014-12). "Z80 Special Reset".
    * http://primrosebank.net/computers/z80/z80_special_reset.htm
14. https://spectrumcomputing.co.uk/forums/viewtopic.php?t=10555
    1. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=132144#p132144
15. https://worldofspectrum.org/forums/discussion/20345
16. https://groups.google.com/g/comp.os.cpm/c/HfSTFpaIkuU/m/KotvMWu3bZoJ
17. Cringle, Frank D. (1998-01-28). "Yaze - Yet Another Z80 Emulator" v1.10.
    * ftp://ftp.ping.de/pub/misc/emulators/yaze-1.10.tar.gz
18. https://baltazarstudios.com/zilog-z80-undocumented-behavior
19. Flammenkamp, Achim. "Interrupt Behaviour of the Z80 CPU".
    * http://z80.info/interrup.htm
20. Young, Sean (1998-10). "Z80 Undocumented Features (in Software Behaviour)"
    v0.3.
    * http://www.msxnet.org/tech/Z80/z80undoc.txt
21. https://elmundodelspectrum.com/desenterrando-el-primer-emulador-de-spectrum
22. https://elmundodelspectrum.com/con-vosotros-el-emulador-de-pedro-gimeno-1989
23. https://sourceforge.net/p/fuse-emulator/mailman/message/4502844
24. Harston, Jonathan Graham (2008). "Full Z80 Opcode List Including
    Undocumented Opcodes" v0.11 (revised).
    * http://www.mdfsnet.f9.co.uk/Docs/Comp/Z80/OpList
25. Harston, Jonathan Graham (2012). "Z80 Microprocessor Undocumented
    Instructions" v0.15.
    * http://mdfs.net/Docs/Comp/Z80/UnDocOps
26. Harston, Jonathan Graham (2014). "Z80 Opcode Map" v0.10 (revised).
    * http://mdfs.net/Docs/Comp/Z80/OpCodeMap
27. http://mdfs.net/Software/Z80/Exerciser/Spectrum
28. https://github.com/MrKWatkins/ZXSpectrumNextTests
29. https://zx-pk.ru/threads/36139-cpd-test-dlya-proverki-izmeneniya-registra-me
    mptr-instruktsiyami-proverte-na-reale-plz.html
30. Young, Sean (2005-09-18). "Undocumented Z80 Documented, The" v0.91.
    * http://www.myquest.nl/z80undocumented
    * http://www.myquest.nl/z80undocumented/z80-documented-v0.91.pdf
31. https://worldofspectrum.org/forums/discussion/41704
    * http://zxds.raxoft.cz/taps/misc/zexall2.zip
32. https://worldofspectrum.org/forums/discussion/41834
    * http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip
    * https://github.com/raxoft/z80test
    1. https://worldofspectrum.org/forums/discussion/comment/668760/#Comment_668
       760
33. https://worldofspectrum.org/forums/discussion/34574
    1. https://worldofspectrum.org/forums/discussion/comment/539714/#Comment_539
       714
        * http://zxprojects.com/images/stories/z80_startup/reg_start_value.zip
34. https://jisanchez.com/test-a-dos-placas-de-zx-spectrum
35. Weissflog, Andre (2021-12-17). "New Cycle-Stepped Z80 Emulator, A".
    * https://floooh.github.io/2021/12/17/cycle-stepped-z80.html
36. https://github.com/floooh/v6502r
37. https://groups.google.com/g/comp.sys.sinclair/c/WPsPr6j6w5k/m/O_u1zNQf3VYJ
38. Young, Sean (1997-09-21). "Zilog Z80 CPU Specifications".
    * http://www.msxnet.org/tech/Z80/z80.zip