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Что (кто) такое Zilog Z280 - определение
MICROPROCESSOR BY ZILOG
Z280; ZILOG Z280
Найдено результатов: 18
Zilog Z280
An enhanced version of the Zilog Z80 with a 16 bit
architecture, introduced in July, 1987. It added an MMU to
expand addressing to 16Mb, features for multitasking, a 256
byte cache, and a huge number of new op codes (giving a
total of over 2000!). Its internal clock runs at 2 or 4 times
the external clock (e.g. a 16MHz CPU with a 4MHz bus).
(1994-10-31)
Zilog Z280
The Zilog Z280 is a 16-bit microprocessor, an enhancement of the Zilog Z80 architecture, introduced in July 1987. It is basically the Z800, renamed, with slight improvements such as being fabricated in CMOS.
Z8000
![[[AMD]] Z8002APC](https://commons.wikimedia.org/wiki/Special:FilePath/AMD Z8002APC 1.jpg?width=200 "[[AMD]] Z8002APC")
![VEB Mikroelektronik "Karl Marx" Erfurt (MME)]] UB8001C](https://commons.wikimedia.org/wiki/Special:FilePath/MME UB8001C 1.jpg?width=200 "VEB Mikroelektronik \"Karl Marx\" Erfurt (MME)]] UB8001C")
![Sharp]] LH8002P](https://commons.wikimedia.org/wiki/Special:FilePath/Sharp LH8002P 1.jpg?width=200 "Sharp]] LH8002P")
16-BIT MICROPROCESSOR
Z8000; Z8001; Zilog Z16C01; Zilog Z8001; Zilog Z8002; Zilog Z-8000; U8000; Zilog Enhanced UNIX System; Zilog ZEUS; ZEUS (Zilog); ZEUS (Unix); Zilog System 8000 UNIX
Zilog Z8000
16-BIT MICROPROCESSOR
Z8000; Z8001; Zilog Z16C01; Zilog Z8001; Zilog Z8002; Zilog Z-8000; U8000; Zilog Enhanced UNIX System; Zilog ZEUS; ZEUS (Zilog); ZEUS (Unix); Zilog System 8000 UNIX
<processor> A microprocessor from Zilog introduced not
long after the Intel 8086, but with superior features. It
was basically a 16-bit processor, but could address up to 23
bits in some versions by using segment registers (to supply
the upper 7 bits). There was also an unsegmented version, but
both could be extended further with an additional MMU that
used 64 segment registers.
Internally, the Z8000 had sixteen 16-bit registers, but
register size and use were exceedingly flexible. The Z-8000
registers could be used as sixteen 8-bit registers (only the
first half were used like this), sixteen 16-bit registers,
eight 32-bit registers, or four 64-bit registers, and included
32-bit multiply and divide. They were all general purpose
registers - the stack pointer was typically register 15,
with register 14 holding the stack segment (both accessed as
one 32-bit register for painless address calculations).
The Z8000 featured two modes, one for the operating system
and one for user programs. The user mode prevented the user
from messing about with interrupt handling and other
potentially dangerous stuff.
Finally, like the Zilog Z80, the Z8000 featured automatic
DRAM refresh circuitry. Unfortunately it was somewhat slow,
but the features generally made up for that. Initial bugs
also hindered its acceptance (partly because it did not use
microcode). There was a radiation resistant military
version.
There was a later 32-bit, pipelined version, the {Zilog
Z80000}.
(1997-12-16)
Zilog
AMERICAN MANUFACTURER OF MICROPROCESSORS
Curtis J. Crawford; ZiLOG; Multi-functional Operating System; Crawford, C. J.; Crawford, Curtis J.; Curtis Crawford; Zilog, Inc.
<company> The microprocessor manufacturer who produced the
Zilog Z80 in July 1976 (as used by Sinclair in the
ZX-80, ZX-81 and ZX Spectrum computers) and later the
Zilog Z8000.
Zilog was founded in 1974 and became a wholly owned subsidiary
of Exxon Corp. by 1980. The company's management and
employees purchased Zilog back from Exxon in 1989. Zilog
became a publicly-held company in February, 1991. In March of
1998, Zilog was privatised, as a result of the merger and
recapitalisation transaction by Texas Pacific Group (TPG).
Zilog now produce a range of 8-bit microcontrollers, 8-, 16-
and 32-bit microprocessors, and digital signal processors,
covering the home entertainment, communications, and {embedded
systems} markets.
http://zilog.com/.
Address: 910 East Hamilton Avenue, Suite 110, Campbell,
CA 95008, USA.
(1998-09-14)
Zilog SCC
FAMILY OF SERIAL PORT DRIVER INTEGRATED CIRCUITS MADE BY ZILOG
Zilog 8530
The SCC, short for Serial Communication Controller, is a family of serial port driver integrated circuits made by Zilog. The primary members of the family are the Z8030/Z8530, and the Z85233.
Zilog Z80000
<processor> A later version of the Zilog Z8000, expanded to
32 bits internally and with a 6-stage pipeline.
(1997-12-16)
Zilog Z80000
The Z80000 is Zilog's 32-bit processor, first released in 1986. It is essentially a 32-bit expansion of its 16-bit predecessor, the Zilog Z8000.
Zilog Z80
![The Z80A was used as the CPU in a number of gaming consoles, such as this [[ColecoVision]].](https://commons.wikimedia.org/wiki/Special:FilePath/ColecoVision-Open-FL.jpg?width=200 "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.](https://commons.wikimedia.org/wiki/Special:FilePath/PABX.jpg?width=200 "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.")
![DIP40]] chip package pinout](https://commons.wikimedia.org/wiki/Special:FilePath/Z80 pinout.svg?width=200 "DIP40]] chip package pinout")
![A [[CMOS]] Z80 in a [[quad flat package]]](https://commons.wikimedia.org/wiki/Special:FilePath/Z84C0010FEC LQFP.png?width=200 "A [[CMOS]] Z80 in a [[quad flat package]]")
![Sinclair]] [[ZX Spectrum]] which used a Z80 Clocked at 3.5 MHz](https://commons.wikimedia.org/wiki/Special:FilePath/ZX Spectrum.jpg?width=200 "Sinclair]] [[ZX Spectrum]] which used a Z80 Clocked at 3.5 MHz")
![[[Mostek]] Z80: MK3880](https://commons.wikimedia.org/wiki/Special:FilePath/KL Mostek MK3880P Z80.jpg?width=200 "[[Mostek]] Z80: MK3880")
![[[NEC μPD780C]]](https://commons.wikimedia.org/wiki/Special:FilePath/KL NEC uPD780C.jpg?width=200 "[[NEC μPD780C]]")
![[[Sharp LH0080]]](https://commons.wikimedia.org/wiki/Special:FilePath/Sharp LH0080A.jpg?width=200 "[[Sharp LH0080]]")
![U880D]]](https://commons.wikimedia.org/wiki/Special:FilePath/KL KME U880D-1.jpg?width=200 "U880D]]")
![R800]]](https://commons.wikimedia.org/wiki/Special:FilePath/R800 02.jpg?width=200 "R800]]")
![Hitachi [[HD64180]]](https://commons.wikimedia.org/wiki/Special:FilePath/HD64180 DIP.jpg?width=200 "Hitachi [[HD64180]]")
![Zilog [[Z180]]](https://commons.wikimedia.org/wiki/Special:FilePath/Z180 PLCC 1988.png?width=200 "Zilog [[Z180]]")
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
<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.
Gaby Chaudry site (http://gaby.de/z80/).
(2004-06-10)
Z80
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
Википедия
Zilog Z280
The Zilog Z280 is a 16-bit microprocessor, an enhancement of the Zilog Z80 architecture, introduced in July 1987. It is basically the Z800, renamed, with slight improvements such as being fabricated in CMOS. It was a commercial failure. Zilog added a memory management unit (MMU) to expand the addressing range to 16 MB, features for multitasking and multiprocessor and coprocessor configurations, and 256 bytes of on-chip static RAM, configurable as either a cache for instructions and/or data, or as part of the ordinary address space. It has a huge number of new instructions and addressing modes giving a total of over 2000 combinations. It is capable of efficiently handling 32-bit data operations including hardware multiply, divide, and sign extension. It offers Supervisor and User operating modes, and optionally separate address spaces for instructions and data in both modes (four total possible address spaces). Its internal clock signal can be configured to run at 1, 2 or 4 times the external clock's speed (e.g. a 12MHz CPU with a 3 MHz bus). Unlike the Z80 the Z280 uses a multiplexed arrangement for its address and data busses. More successful extensions of the Z80-architecture include the Hitachi HD64180 in 1986 and Zilog eZ80 in 2001, among others. See further Zilog Z800.
The Z280 had many advanced features for its time, most of them never seen again on a Zilog processor:
- On-chip instruction and/or data cache, or on-chip RAM
- Instruction pipelining
- High performance 16-bit Z-BUS interface or 8-bit Z80-compatible bus interface
- Built-in MMU with memory protection
- Ability to determine which register set is in context with instructions JAF and JAR
- Three on-chip 16-bit counter/timers
- Four on-chip DMA channels
- On-chip full duplex UART
- User I/O trap
- Supervisor mode (privileged instructions)
- Illegal instruction trap
- Coprocessor emulation trap
- Burst mode memory access
- Multiprocessor support, with many bus configuration modes
- Support for multiple external coprocessors through an accelerated communication interface
- Multiple I/O pages, which also allows for internal I/O devices without restricting the address range of the I/O ports like on eZ80, or conflicting with existing motherboard devices, like the Z180.
- Stack overflow warning
