What is the names of the 8-bit Zilog processors?

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.

How much memory can a Z80 address?

1 Answer. The Z80 has a 16bit address bus, therefore it can only address at most 64KB of memory. It also has a separate I/O control line, which means that bank switching circuitry can be implemented so that the maximum usable memory is increased beyond this limit.

How many registers are in the Z80 processor?

14
The Z80 processor contains 14 general purpose registers which can be used for holding and manipulating data bytes. Each of these registers is 8-bits wide and they are named A, B, C, D, E, H, L, A’, B’, C’, D’, E’, H’, L’.

How many different locations can the Z80 CPU address?

Z80 was the heart of many computers like Spectrum, Partner, TRS703, and Z-3. The Z80 microprocessor is an 8-bit CPU with a 16-bit address bus capable of direct accessing 64k of memory space. The Z80 CPU can execute 158 different instructions.

Which is not a 8-bit microprocessor?

8085, Z-80 and 6502 are 8-bit microprocessors whereas 68000 is a 16-bit microprocessor. 68000 is a 16-bit microprocessor. So it has 16 data lines.

Who bought Zilog?

Littelfuse Inc
In August 2017, Zilog and its parent IXYS Corporation were acquired by Littelfuse Inc in exchange for $750 million in cash and stocks.

Is the Z80 still made?

Alongside the 6502, the Z80 was one of the most popular 8-bit processors for general purpose microcomputers and other applications from the late 1970s well into the 1980s, and modern CMOS versions of both CPUs are still in production and use today (as of May 2021).

What are the two register sets used in Z80?

What are the two register sets used in Z80? Explanation: Z80 have two sets of registers which are the main registers and alternate registers.

Is the Z80 still used?

The Z80 processor was designed in 1976 to compete with Intel’s classic 8080 chip, the predecessor to the chips that most people have in their computers today. Z80s are still used even today, where a high-power processor isn’t needed.

What happened to Zilog?

In August 2017, Zilog and its parent IXYS Corporation were acquired by Littelfuse Inc in exchange for $750 million in cash and stocks.

Is a 8 bit microprocessor?

In computer architecture, 8-bit integers or other data units are those that are 8 bits wide (1 octet). Also, 8-bit CPU and ALU architectures are those that are based on registers or data buses of that size….Notable 8-bit CPUs.

What is meaning by 8 bit processor?

8-bit is an early computer hardware device or software program that is capable of transferring eight bits of data at the same time. For example, the Intel 8080 processor, which was one of the first widely used computer processors ran on an 8-bit architecture. Today’s computer processors are 64-bit.

What are the instructions in the Zilog Z80?

An enhanced instruction set including single-bit addressing, shifts/rotates on memory and registers other than the accumulator, rotate instructions for BCD number strings in memory, program looping, program counter relative jumps, block copy, block input/output (I/O), and byte search instructions.

What are the undocumented opcodes in Z80?

The undocumented Z80 instructions are corresponding to ‘holes’ in the opcodes. 1 – Undocumented index operations In this section, IX operations will be described. IY operations, obtained by replacing DDs with FDs, behave identically.

What’s the difference between Reti and RETN in Zilog Z80A?

The only difference between RETI and RETN is that peripheral devices which allow daisy-chaining of interrupts (eg the Z80 PIO) recognise the ED 4D sequence as ‘end of interrupt’ and then know that they can allow a further interrupt to be passed to the processor. The DD and FD opcodes precede instructions using the IX and IY registers.

Are there any extra instructions for the Z800?

Why Zilog is silent about the next bunch of instructions is a mystery to me. But they also make the Z800, the Z8000, the Z180, the Z280 and the Z380 which must al be compatible on instruction level so maybe the extra z80 instructions aren’t implemented in one of these. Who cares anyway, lets get to the 🙂

https://www.youtube.com/watch?v=4KVOwhe0Ifo