Zilog Z80 - Definition. Was ist Zilog Z80
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Was (wer) ist Zilog Z80 - definition

8-BIT MICROPROCESSOR
Z80; Zilog z80; Z80a; Zilog Z-80; Z80 A; Z-80; Z80A; Sharp LH0080; NEC uPD780C; ZiLOG Z80; Z-80A; Sharp LH-0080; Zilog Z80A; NEC D780C; D780C; UPD780C; NEC 780C; ΜPD780C-1; Z80 instruction set; Z80 architecture; NEC μPD9002; Z80 microprocessor; Z80H; Z80B; Z80A-CPU-D; Sharp Z80A-CPU-D; LH0080A; Sharp LH0080A; Zilog Z80B
  • The Z80A was used as the CPU in a number of gaming consoles, such as this [[ColecoVision]].
  • Z80-based [[PABX]]. The Z80 is the third chip from the left, to the right of the chip with the hand-written white label on it.
  • title=Down to the silicon: how the Z80's registers are implemented}}</ref>
  • DIP40]] chip package pinout
  • A [[CMOS]] Z80 in a [[quad flat package]]
  • Sinclair]] [[ZX Spectrum]] which used a Z80 Clocked at 3.5 MHz
  • A May 1976 advertisement for the Zilog Z-80 8-bit microprocessor

Zilog Z80         
<processor> An 8-bit microprocessor. It was released in July 1976 with a 2.5 MHz clock rate. The Z80 was a much improved Intel 8080 (as was the Intel 8085). It also used 8-bit data and 16-bit addressing, and could execute all of the 8080 op codes as well as 80 new ones, instructions that included 1, 4, 8 and 16-bit operations and even block move and block I/O instructions. The register set was doubled, with two banks of registers (including A and F) that could be switched between. This allowed fast operating system or interrupt context switches. It features 3 types of interrupt mode. The Z80 also added two index registers (IX and IY) and relocatable vectored interrupts (via the 8-bit IV register). Like many processors (including the 8085), the Z80 featured many undocumented op codes. Chip area near the edge was used for added instructions, but fabrication made the failure of these high. Instructions that often failed were just not documented, increasing chip yield. Later fabrication made these more reliable. The thing that really made the Z80 popular was the memory interface - the CPU generated it's own RAM refresh signals, which meant easier design and lower system cost. That and its 8080 compatibility and CP/M, the first standard microprocessor operating system, made it the first choice of many systems. In addition to the original Z80 (2.5 MHz) there are the {Zilog Z80A} (4 MHz), Zilog Z80B (6MHz) and Zilog Z80H (8 MHz) versions. The popular Hitachi HD64180 processor family adds peripherals and an MMU to the Z80. The Zilog Z280 was an enhanced version with an MMU and many new op codes. The Z80 was used in the first Nintendo Game Boy. A Sharp Z80 work-alike was used in the GameBoy Color, running at 4 MHz for GameBoy software or at 8 MHz for Game Boy Color software. The Z80 was used in the Sega Master System and the Game Gear. It was also used in the Sega Genesis for hardware reverse compatibility with the Sega Master System through a special cartridge. z80/">Gaby Chaudry site (http://gaby.de/z80/). (2004-06-10)
Z80         
Zilog Z80A         
<processor> A version of the Zilog Z80 microprocessor with a 4 MHz clock rate. (1995-04-24)

Wikipedia

Zilog Z80

The Z80 is an 8-bit microprocessor introduced by Zilog as the startup company's first product. The Z80 was conceived by Federico Faggin in late 1974 and developed by him and his 11 employees starting in early 1975. The first working samples were delivered in March 1976, and it was officially introduced on the market in July 1976. With the revenue from the Z80, the company built its own chip factories and grew to over a thousand employees over the following two years.

The Zilog Z80 is a software-compatible extension and enhancement of the Intel 8080 and, like it, was mainly aimed at embedded systems. Although used in that role, the Z80 also became one of the most widely used CPUs in desktop computers and home computers from the 1970s to the mid-1980s. It was also common in military applications, musical equipment such as synthesizers (like the Roland Jupiter-8), and coin-operated arcade games of the late 1970s and early 1980s, including Pac-Man.

Zilog licensed the Z80 to the US-based Synertek and Mostek, which had helped them with initial production, as well as to a European second-source manufacturer SGS. The design was also copied by several Japanese, East European and Soviet manufacturers. This won the Z80 acceptance in the world market since large companies like NEC, Toshiba, Sharp, and Hitachi started to manufacture the device (or their own Z80-compatible clones or designs).

In recent decades Zilog has refocused on the ever-growing market for embedded systems, and the most recent Z80-compatible microcontroller family, the fully pipelined 24-bit eZ80 with a linear 16 MB address range, has been successfully introduced alongside the simpler Z80 and Z180 products.