Zilog Z-80: Difference between revisions

Latest revision as of 22:04, 25 September 2024

The Zilog Z-80 (P/N 156-0983-03,156-0983-04,156-0963-02,156-2280-00) is an 8-bit microprocessor monolithic integrated circuit introduced in 1975.

It implements an upward-compatible extension of the Intel 8080 instruction set, and requires only a +5 V supply. It adds several registers, indexed addressing modes, a vectored interrupt system, and a hardware DRAM refresh counter to the 8080 architecture.

There were several speed grades, initially starting at 2.5 MHz (non-suffix) / 4 MHz (Z80A) / 6 MHz (Z80B), etc. Later CMOS versions were available with up to 20 MHz, and derivatives up to about 50 MHz. Several second-source manufacturers produced their versions of this CPU.

The National Semiconductor NSC800 is code-compatible with the Z-80 but has a multiplexed address/data bus like the Intel 8085, without being pin compatible with either.

Links

Zilog Z80 @ Wikipedia

Used in

Some instruments using part Zilog Z-80

Instrument	Manufacturer	Class	Model	Description	Introduced
1503B	Tektronix	Reflectometer	1503B	Time Domain Reflectometer	1988
1503C	Tektronix	Reflectometer	1503C	Time Domain Reflectometer	1992
318	Tektronix	Logic Analyzer	318	16 channel logic analyzer	1984
338	Sony/Tektronix	Logic Analyzer	338	32 channel logic analyzer	1984
5223	Tektronix	Oscilloscope	5223	10 MHz analog/digital mainframe	1981
834	Tektronix	Logic Analyzer	834	Programmable data communications tester	1980
835	Tektronix	Logic Analyzer	835	Programmable data communications tester	1986
836	Tektronix	Logic Analyzer	836	Programmable data communications tester	1986
DAS9100	Tektronix	Logic Analyzer	DAS9100	Logic Analyzer	1982
SPG-271	Tektronix	Audio/Video	SPG-271	PAL Video Sync Generator	1989
TSG-170	Tektronix	Audio/Video	TSG-170	digital composite generator	1989

836: Z80H
835: Z80A
5223 Opt.10 (GPIB board)

156-0963-02: Z-80A
156-2280-00: Z-80H

Supported by

NSC800

@@ Line 6: / Line 6: @@
 |an=an
 |Description=8-bit microprocessor
-|Used_in=318;338;5223;834;835;836;DAS9100;SPG-271;TSG-170;
+|Used_in=318;338;1503B;1503C;5223;834;835;836;DAS9100;SPG-271;TSG-170;
 }} introduced in 1975.
 It implements an upward-compatible extension of the [[Intel 8080]] instruction set, and requires only a +5 V supply.
-It adds several registers, a vectored interrupt system, and a hardware DRAM refresh counter to the 8080 architecture.
+It adds several registers, indexed addressing modes, a vectored interrupt system, and a hardware DRAM refresh counter to the 8080 architecture.
-There were several speed grades, initially starting at 2.5 MHz (non-suffix) / 4 MHz (Z80A) / 6 MHz (Z80B), etc., later CMOS versions up to 20 MHz, and derivatives up to about 50 MHz. Several second-source manufacturers produced their versions of this CPU.
+There were several speed grades, initially starting at 2.5 MHz (non-suffix) / 4 MHz (Z80A) / 6 MHz (Z80B), etc.  Later CMOS versions were available with up to 20 MHz, and derivatives up to about 50 MHz. Several second-source manufacturers produced their versions of this CPU.
 The '''National Semiconductor NSC800''' is code-compatible with the Z-80 but has a multiplexed address/data bus like the [[Intel 8085]], without being pin compatible with either.