Motorola 68020: Difference between revisions
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{{Monolithic IC | |||
|Manufacturer=Motorola | |||
|Model=68020 | |||
|Part_nos= | |||
|Description=32-bit microprocessor | |||
|Used_in=4224;4225;4310;4325; | |||
}} based on the [[Motorola 68000]] architecture, introduced in 1984. | |||
Unlike the earlier 68000-family CPUs, the 68020 has 32-bit internal and external data and address buses and a 32-bit ALU. It was produced with clock speed ratings from 12 MHz to 33 MHz. | Unlike the earlier 68000-family CPUs, the 68020 has 32-bit internal and external data and address buses and a 32-bit ALU. It was produced with clock speed ratings from 12 MHz to 33 MHz. | ||
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==Used in== | ==Used in== | ||
{{Part usage}} | |||
==Supported by== | ==Supported by== |
Latest revision as of 03:31, 11 September 2023
The Motorola 68020 is a 32-bit microprocessor monolithic integrated circuit based on the Motorola 68000 architecture, introduced in 1984.
Unlike the earlier 68000-family CPUs, the 68020 has 32-bit internal and external data and address buses and a 32-bit ALU. It was produced with clock speed ratings from 12 MHz to 33 MHz.
Compared to the predecessors, the 68020 adds extra instructions and additional addressing modes, pipelining, a 256-byte direct-mapped instruction cache, and support for non-aligned memory accesses. It also features an asynchronous coprocessor interface supporting up to eight coprocessors, such as floating point units (MC68881 or MC68882) or a paged memory management unit (MC68851).
The lower-cost 68EC020 version has a 24-bit external address bus.
Links
- Motorola 68020 @ Wikipedia
Used in
Some instruments using part Motorola 68020
Instrument | Manufacturer | Class | Model | Description | Introduced |
---|---|---|---|---|---|
4224 | Tektronix | Terminal | 4224 | 16" or 19" Color graphics terminal | 1988 |
4225 | Tektronix | Terminal | 4225 | 16" or 19" Color graphics terminal | 1988 |
4325 | Tektronix | Terminal | 4325 | 16" or 19" Color graphics workstation | 1988 |
Supported by
- ...
Pictures
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MC68020RC16B
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MC68020RC16B
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MC68020RC20E
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MC68020RC20E