Technical literature

Articles

Title	Date	Author
Down to the silicon: How the Z80's Registers Are Implemented	2014-10	Shirriff, Ken
Interrupt Behaviour of the Z80 CPU		Flammenkamp, Achim
Reverse-Engineering the Z-80: The Silicon for Two Interesting Gates Explained	2013-09	Shirriff, Ken
The Z-80 Has a 4-Bit ALU. Here's How It Works	2013-09	Shirriff, Ken
The Z-80's 16-Bit Increment/Decrement Circuit Reverse Engineered	2013-11	Shirriff, Ken
Why the Z-80's Data Pins Are Scrambled	2014-09	Shirriff, Ken
Z80 Special Reset (old article, the latest version is here)	2014-12	Brewer, Tony

Documents

Title	Edition	Date	Author(s)	Download
1981 Data Book		1981	Zilog	pdf
1981 Z80 Microcomputer Data Book		1981-03	Mostek	pdf
1982/83 Data Book		1982	Zilog	pdf[1], pdf[2]
1982/83 Z80 Designers Guide		1982-06	Mostek	pdf
1983/84 Data Book		1983	Zilog	pdf
1985 Data Book		1985	Zilog	pdf
1986 Semiconductor Data Book (MOS Edition)		1986-03	Sharp	pdf
1990 8-Bit Microprocessor: TLCS-Z80, 85		1990-06	Toshiba	pdf
1990-91 Microcomputers Data Book		1990-10	Sharp	pdf
Decoding Z80 Opcodes		2004-08	Dinu, Cristian	htm
Decoding Z80 Opcodes	rev. 1	2004-09	Dinu, Cristian	htm
Decoding Z80 Opcodes	rev. 2	2005-01	Dinu, Cristian	htm
Decoding Z80 Opcodes	rev. 2 (revised)	2006-08	Dinu, Cristian	htm
Decoding Z80 Opcodes	rev. 2 (revised)	2018-03	Dinu, Cristian	htm
Full Z80 Opcode List Including Undocumented Opcodes	v0.10	1997-09-09	Harston, Jonathan Graham	txt
Full Z80 Opcode List Including Undocumented Opcodes	v0.11	1998-04-15	Harston, Jonathan Graham	txt
Full Z80 Opcode List Including Undocumented Opcodes	v0.11 (revised)	2008-0x	Harston, Jonathan Graham	txt
MEMPTR, Esoteric Register of the Zilog Z80 CPU	(en)	2006-03-29	boo_boo; Kladov, Vladimir	txt
MEMPTR, Эзотерический Регистр Zilog Z80	(ru)	2006-03-29	boo_boo; Kladov, Vladimir	txt
Microprocessors - Volume 1: 8bit MPUs & MCUs		1987-01	Toshiba	pdf
Microprocessor Applications Reference Book: Volume 1		1981-07	Zilog	pdf
Microprocessor Applications Reference Book: Volume 2		1983-08	Zilog	pdf
MK3880 Central Processig Unit		1979	Mostek	pdf
Product Evaluation of the Zilog Z80-CTC		1979-06-12	ICE	pdf
Superintegration Shortform Catalog 1992		1992	Zilog	pdf
Undocumented Z80 Documented, The	v0.4	2001-09	Young, Sean	pdf, tex
Undocumented Z80 Documented, The	v0.6	2003-11-20	Young, Sean	pdf, tex
Undocumented Z80 Documented, The	v0.9	2005-06-14	Young, Sean	pdf, tex
Undocumented Z80 Documented, The	v0.91	2005-09-18	Young, Sean	pdf
Undocumented Z80 Flags	rev. 1.0	2018-08-21	Banks, David	pdf
Volume I Databook: Microprocessors and Peripherals		1992	Zilog	pdf
Z-80 CTC Counter/Timer Circuit: Product Specification		1980-02	Zilog	pdf
Z-80 DMA Direct Memory Access Controller: Product Specification		1980-02	Zilog	pdf
Z-80 SIO Serial Input/Output Controller: Product Specification		1980-02	Zilog	pdf
Z80 CPU Central Processing Unit Technical Manual		1987-08	Zilog	pdf
Z80 CPU Microprocessor Instant Reference Card		1981	Micro Logic	pdf
Z80 CPU Peripherals User Manual		2001-08	Zilog	pdf
Z80 CPU User Manual		2001	Zilog	pdf
Z80 CPU User Manual		2002-12-10	Zilog	pdf
Z80 CPU User Manual	rev. 04	2005-0x	Zilog	pdf
Z80 CPU User Manual	rev. 05	2005-03	Zilog	pdf
Z80 CPU User Manual	rev. 06	2014-07	Zilog	pdf
Z80 CPU User Manual	rev. 08	2016-01	Zilog	pdf
Z80 CPU User Manual	rev. 11	2016-09	Zilog	pdf
Z80 Family Data Book		1989-01	Zilog	pdf
Z80 Family Product Specifications Handbook		1984-02	Zilog	pdf
Z80 Family Program Interrupt Structure, The		1978-05	Zilog	pdf, pdf[rewritten]
Z80 Family User's Manual		1994	Zilog	pdf
Z80 Interupt Mode 2		2008-0x	Harston, Jonathan Graham	txt
Z80 Interupt Mode 2		2010	Harston, Jonathan Graham	txt
Z80 Microcomputer System Micro-Reference Manual		1978-02	Mostek	pdf
Z80 Microprocessor Family	1st edition	1990-01	SGS-Thomson	pdf[1], pdf[2]
Z80 Microprocessor Undocumented Instructions	v0.12	1997-10-15	Harston, Jonathan Graham	txt
Z80 Microprocessor Undocumented Instructions	v0.13	1997-12-18	Harston, Jonathan Graham	txt
Z80 Microprocessor Undocumented Instructions	v0.15	2012-0x	Harston, Jonathan Graham	txt
Z80 Opcode Map	v0.10	1997-09-09	Harston, Jonathan Graham	txt
Z80 Opcode Map	v0.10 (revised)	2005	Harston, Jonathan Graham	txt
Z80 Opcode Map	v0.10 (revised)	2008-0x	Harston, Jonathan Graham	txt
Z80 Opcode Map	v0.10 (revised)	2011-0x	Harston, Jonathan Graham	txt
Z80 Opcode Map	v0.10 (revised)	2014	Harston, Jonathan Graham	txt
Z80 Programming Manual	v2.0	1978-10	Mostek	pdf
Z80 Undocumented Features (In Software Behaviour)	v0.3	1998-10	Young, Sean	txt
Z80-Assembly Language Programming Manual		1978-01	Zilog	pdf
Z80-Assembly Language Programming Manual		1980-04	Zilog	pdf
Z80-CPU Technical Manual		1976	Zilog	pdf, pdf[B&W]
Z80-CPU Z80A-CPU Product Specification		1978-03	Zilog	pdf
Z80-CPU Z80A-CPU Technical Manual		1977	Zilog	pdf
Zilog Data Book		197x	Zilog	pdf
Zilog Z80 CPU Specifications		1997-09-21	Young, Sean	doc
Zilog Z80 Instructions Sorted by Opcode	v0.2	1998-09	Young, Sean	txt

Patents

No.	Topics	Filed	Granted	Owner	Download
US4332008	Memory refresh and architecture.	1979-11-09	1982-05-25	Zilog	pdf
US4486827	Special reset.	1982-01-18	1984-12-04	Zilog	pdf
US6502181B1	Zilog eZ80 CPU.	1999-09-17	2002-12-31	Zilog	pdf

Discussions, wikis and forum threads

• GitHub
  • SCF/CCF flags test incorrect or incomplete
  • David Bank's Z80Decoder wiki
    • Undocumented Flags
    • Unstable CCF/SCF Behaviour
• Spectrum Computing
  • Z80 Block Flags Test for the "recently" discovered behavior of the block instructions of the Z80 CPU
  • New discovery on Z80 interrupts
  • New discovery on Z80 I/O block instructions
• StarDot
  • Z80 Protocol Decoder
  • New discovery on Z80 interrupts
• World of Spectrum
  • MEMPTR tests for emulator authors
  • SCF/CCF flags - new discovery
  • New Z80 CPU emulation tester
  • RAND USR that doesn't work in emulators and clones
• ZX-PK.ru: Speccy наш выбор
  • команда BIT n,(HL)
  • Просьба реальщикам от эмуляторщиков
  • Реверс-инжиниринг Z80
  • Загадка плавающих флагов SCF/CCF раскрыта!
• ZXPRESS
  • команда BIT n,(HL)