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The 8085 CPU was only one part of a much larger family of chips developed by Intel, for building a complete system.
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8085 and CPU
* CPU: 8085 at 5. 5 MHz.
8085 and was
The 8080 device, often described as the first truly useful microprocessor, was eventually replaced by the depletion-load based 8085 ( 1977 ) which could cope with a single 5V power supply instead of the three different operating voltages of earlier chips.
Marketed as source compatible, the 8086 was designed to allow assembly language for the 8008, 8080, or 8085 to be automatically converted into equivalent ( sub-optimal ) 8086 source code, with little or no hand-editing.
However, the 8086 design was expanded to support full 16-bit processing, instead of the fairly basic 16-bit capabilities of the 8080 / 8085.
Another factor was that the 8088 allowed the computer to be based on a modified 8085 design, as it could easily interface with most nMOS chips with 8-bit databuses, i. e. existing and mature, and therefore economical, components.
The most important of the early OSes on these machines was Digital Research's CP / M-80 for the 8080 / 8085 / Z-80 CPUs.
Though the concept was first proposed in 1991, software-defined radios have their origins in the defense sector since the late 1970s in both the U. S. and Europe ( for example, Walter Tuttlebee described a VLF radio that used an ADC and an 8085 microprocessor ).
A downside compared to similar contemporary designs ( such as the Z80 ) was the fact that the buses required demultiplexing ; however, address latches in the Intel 8155, 8355, and 8755 memory chips allowed a direct interface, so an 8085 along with these chips was almost a complete system.
An improvement over the 8080 was that the 8085 can itself drive a piezoelectric crystal directly connected to it, and a built in clock generator generates the internal high amplitude two-phase clock signals at half the crystal frequency ( a 6. 14 MHz crystal would yield a 3. 07 MHz clock, for instance ).
Later 8085 and 8086 support was added including ICE ( in-circuit emulators ).
The 8085 processor was used in a few early personal computers, for example, the TRS-80 Model 100 line used an OKI manufactured 80C85 ( MSM80C85ARS ).
* MCS-85 was a family of Intel processors including the 8085
The IMSAI 8080 was an early microcomputer released in late 1975, based on the Intel 8080 and later 8085 and S-100 bus.
The processor was an 8-bit Intel 8085, with bank switching logic to manage 256 kB of memory.
The 8-bit Intel 8080 ( as well as the 8085 and 8051 ) microprocessor was basically a slightly extended accumulator-based design and therefore not orthogonal.
The same basic idea was employed for the Intel 8086, although, to allow for more radical extensions, binary-compatibility with the 8080 was not attempted here ; instead the 8086 was designed as a more regular and fully 16-bit processor that was source-compatible with the 8008, 8080, and 8085.
This was based on two Intel 8085 series microprocessors: one of which was given over to I / O control.
8085 and only
This means that each 8008 instruction has an equivalent not only in the larger instruction set of the 8080 ( and 8085, Z80 etc.
The " 5 " in the model number came from the fact that the 8085 requires only a + 5-volt ( V ) power supply rather than the + 5V, − 5V and + 12V supplies the 8080 needed.
8085 and one
The Z80 took over from the 8080 and its offspring, the 8085, in the processor market, and became one of the most popular 8-bit CPUs.
The 8085 has extensions to support new interrupts, with three maskable interrupts ( RST 7. 5, RST 6. 5 and RST 5. 5 ), one non-maskable interrupt ( TRAP ), and one externally serviced interrupt ( INTR ).
8085 and chips
* IBM System / 23 Datamaster gave IBM designers familiarity with the 8085 support chips used in the IBM PC
8085 and developed
Both the architecture and the physical chip were therefore developed rather quickly by a small group of people, and using the same basic microarchitecture elements and physical implementation techniques as employed for the slightly older 8085 ( and for which the 8086 also would function as a continuation ).
8085 and by
This included ICs originally intended for support and peripheral functions around the 8085 and similar processors ( not exclusively Intels ) which were already well known by many engineers, further reducing cost.
* Explorer / 85, expandable learning system by Netronics based on the 8085 microprocessor
The Intel 8085 is an 8-bit microprocessor introduced by Intel in 1977.
Both processors were sometimes used in computers running the CP / M operating system, and the 8085 also saw use as a microcontroller, by virtue of its low component count.
Trainer kits composed of a printed circuit board, 8085, and supporting hardware are offered by various companies.
Heath / Zenith then designed a dual Intel 8085 / 8088 based system dubbed the H100 ( or Z-100, in preassembled form, sold by ZDS ).
8085 and Intel
Similar I / O-port schemes were used in the backward compatible Zilog Z80 and Intel 8085 as well as the closely related x86 families of microprocessors.
# REDIRECT Intel 8085
* An Intel 8080 ( and later the 8085 ) or Zilog Z80 microprocessor
* Intel 8085 ( 1977 8080 binary compatible )
The subsequent Intel 8080 and 8085 CPUs were assembly-language ( not binary ) compatible with the 8008 and also heavily based on the same basic internal design.
The 8085 is a conventional von Neumann design based on the Intel 8080.
Intel produced a series of development systems for the 8080 and 8085, known as the MDS-80 Microprocessor System.
In addition to an 8080 / 8085 assembler, Intel produced a number of compilers including PL / M-80 and Pascal languages, and a set of tools for linking and statically locating programs to enable them to be burnt into EPROMs and used in embedded systems.
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