Thanks

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

• Akimov, Vadim (lvd)

  • For testing the library on many different platforms and CPU architectures.

• azesmbog

  1. For validating tests on real hardware. ¹

  2. For discovering the unstable behavior of the ccf/scf instructions.

  3. For his invaluable help.

• Banks, David (hoglet)

  1. For deciphering the additional flag changes of the block instructions. ^{2, 3}

  2. For his research on the behavior of the ccf/scf instructions. ^{3, 4}

• Beliansky, Anatoly (Tolik_Trek)

  • For validating tests on real hardware. ⁵

• Bobrowski, Jan

  • For fixing the “Z80 Full Instruction Set Exerciser for Spectrum”. ⁶

• boo_boo

  • For deciphering the behavior of MEMPTR. ^{7, 8, 9, 10}

• Brady, Stuart

  • For his research on the behavior of the ccf/scf instructions. ¹¹

• Brewer, Tony

  1. For his research on the special RESET. ^{12, 13}

  2. For helping to decipher the additional flag changes of the block instructions. ²

  3. For conducting low-level tests on real hardware. ²

  4. For helping me to test different undocumented behaviors of the Zilog Z80.

• Bystrov, Dmitry (Alone Coder)

  • For validating tests on real hardware. ⁵

• 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. ^{7, 8, 9, 10}

• Conway, Simon (BadBeard)

  • For validating the “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 the “Z80 Instruction Set Exerciser”. ¹⁷

• Devic, Goran

  • For his research on undocumented behaviors of the Z80 CPU. ¹⁸

• 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}

• goodboy

  • For testing the behavior of MEMPTR on real hardware. ^{7, 8, 9, 10}

• Greenway, Ian

  • For testing the behavior of the ccf/scf instructions on real hardware. ^{11, 23}

• Harston, Jonathan Graham

  1. For his research work.

  2. For his technical documents about the Zilog Z80. ^{24, 25, 26}

  3. For porting the “Z80 Instruction Set Exerciser” to the ZX Spectrum. ²⁷

• Helcmanovsky, Peter (Ped7g)

  1. For helping me to write the “IN-MEMPTR” test.

  2. For writing the “Z80 Block Flags Test”. ^{28, 29}

  3. For writing the “Z80 CCF SCF Outcome Stability” test. ²⁹

  4. For writing the “Z80 INT Skip” test. ²⁹

  5. For his research on the unstable behavior of the ccf/scf instructions.

  6. For his invaluable help.

• Iborra Debón, Víctor (Eremus)

  • For validating tests on real hardware.

• icebear

  • For testing the behavior of MEMPTR on real hardware. ^{7, 8, 9, 10}

• ICEknight

  • For validating tests on real hardware.

• Kladov, Vladimir

  • For deciphering the behavior of MEMPTR. ^{7, 8, 9, 10}

• Krook, Magnus

  • For validating tests on real hardware. ³⁰

• 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. ^{7, 8, 9, 10}

• Nair, Arjun

  • For validating tests on real hardware. ²⁸

• 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. ³¹

• Rak, Patrik

  1. For improving the “Z80 Instruction Set Exerciser for Spectrum”. ³²

  2. For deciphering the behavior of the ccf/scf instructions. ^{15, 32}

  3. For writing the “Zilog Z80 CPU Test Suite”. ^{32, 33}

  4. For his research on the unstable behavior of the ccf/scf instructions.

• Rodríguez Jódar, Miguel Ángel (mcleod_ideafix)

  • For his research on the state of the registers after POWER-ON/RESET. ³⁴

• 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.

• Sánchez Ordiñana, José Ismael (Vaporatorius)

  • For validating tests on real hardware. ^{35, 36}

• Sevillano Mancilla, Marta (TheMartian)

  • For validating tests on real hardware. ¹⁴

• Stevenson, Dave

  1. For testing the special RESET on real hardware. ¹²

  2. For conducting low-level tests on real hardware. ³⁷

• 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. ³⁸

  2. For writing the “Visual Z80 Remix” simulator. ³⁹

• Wilkinson, Oli (evolutional)

  • For validating tests on real hardware. ²⁸

• Wlodek

  • For testing the behavior of MEMPTR on real hardware. ^{7, 8, 9, 10}

• Woodmass, Mark (Woody)

  1. For his invaluable contributions to the emuscene.

  2. For writing the “Z80 Test Suite”. ¹⁵

  3. For his research on the behavior of the ccf/scf instructions. ⁴⁰

  4. For writing the “HALT2INT” test.

  5. For writing the “EIHALT” test.

• Young, Sean

  1. For his research work.

  2. For his technical documents about the Zilog Z80. ^{20, 31, 41}

• ZXGuesser

  • For validating tests on real hardware.

References

1. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83384#p83384

2. https://stardot.org.uk/forums/viewtopic.php?t=15464

   • https://stardot.org.uk/forums/viewtopic.php?p=211042#p211042

   • https://stardot.org.uk/forums/viewtopic.php?p=212021#p212021

3. 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

4. https://github.com/hoglet67/Z80Decoder/wiki/Unstable-CCF-SCF-Behaviour

5. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83041#p83041

6. http://wizard.ae.krakow.pl/~jb/qaop/tests.html

7. https://zxpress.ru/zxnet/zxnet.pc/5909

8. https://zx-pk.ru/threads/2506-komanda-bit-n-(hl).html

9. https://zx-pk.ru/threads/2586-prosba-realshchikam-ot-emulyatorshchikov.html

10. 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

11. https://sourceforge.net/p/fuse-emulator/mailman/message/6929573

12. Brewer, Tony (2014-12). “Z80 Special Reset”.

    • http://primrosebank.net/computers/z80/z80_special_reset.htm

13. https://stardot.org.uk/forums/viewtopic.php?p=357136#p357136

14. https://spectrumcomputing.co.uk/forums/viewtopic.php?t=10555

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).

    • https://mdfs.net/Docs/Comp/Z80/OpList

25. Harston, Jonathan Graham (2012). “Z80 Microprocessor Undocumented Instructions” v0.15.

    • https://mdfs.net/Docs/Comp/Z80/UnDocOps

26. Harston, Jonathan Graham (2014). “Z80 Opcode Map” v0.10 (revised).

    • https://mdfs.net/Docs/Comp/Z80/OpCodeMap

27. https://mdfs.net/Software/Z80/Exerciser/Spectrum

28. https://spectrumcomputing.co.uk/forums/viewtopic.php?t=6102

29. https://github.com/MrKWatkins/ZXSpectrumNextTests

30. https://spectrumcomputing.co.uk/forums/viewtopic.php?p=83157#p83157

31. 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

32. https://worldofspectrum.org/forums/discussion/41704

    • http://zxds.raxoft.cz/taps/misc/zexall2.zip

33. https://worldofspectrum.org/forums/discussion/41834

    • http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip

    • https://github.com/raxoft/z80test

34. https://worldofspectrum.org/forums/discussion/34574

35. https://worldofspectrum.org/forums/discussion/comment/668760/#Comment_668760

36. https://jisanchez.com/test-a-dos-placas-de-zx-spectrum

37. https://stardot.org.uk/forums/viewtopic.php?p=212360#p212360

38. Weissflog, Andre (2021-12-17). “New Cycle-Stepped Z80 Emulator, A”.

    • https://floooh.github.io/2021/12/17/cycle-stepped-z80.html

39. https://github.com/floooh/v6502r

40. https://groups.google.com/g/comp.sys.sinclair/c/WPsPr6j6w5k/m/O_u1zNQf3VYJ

41. Young, Sean (1997-09-21). “Zilog Z80 CPU Specifications”.

    • http://www.msxnet.org/tech/Z80/z80.zip