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1. The Free On-line Dictionary of Computing (30 December 2018) |
Motorola 68020
68020
MC68020
A microprocessor from Motorola. It was the
successor to the Motorola 68010 and was followed by the
Motorola 68030. The 68020 has 32-bit internal and external
data and address buses and a 256-byte instruction buffer,
arranged as 64 direct-mapped 4-byte entries[?].
The 68020 added many improvements to the 68010 including a
32-bit ALU and external data bus and address bus, and
new instrucitons and addressing modes. The 68020 (and
68030) had a proper three-stage pipeline.
The new instructions included some minor improvements and
extensions to the supervisor state, some support for
high-level languages which didn't get used much (and was
removed from future 680x0 processors[?]), bigger (32 x 32-bit)
multiply and divide instructions, and bit field manipulations.
The new adderessing modes added another level of indirection
to many of the pre-existing modes, and added quite a bit of
flexibility to various indexing modes and operations.
The instruction buffer (an instruction cache) was 256
bytes, arranged as 64 direct-mapped 4-byte entries. Although
small, it made a significant difference in the performance of
many applications.
The 68881 and the faster 68882 FPU chips could be used with
the 68020.
The 68020 was used in many models of the Apple Macintosh II
series of personal computers and Sun 3 workstations.
(2001-03-07)
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2. U.S. Gazetteer Zip Code Tabulation Areas (2000) |
68020 -- U.S. ZIP code
Municipality (1990): DECATUR, Nebraska
All ZIPs for this municipality (1990):
68020
Population (2000): 905
Housing Units (2000): 520
Land area (2000): 84.653834 sq. miles (219.252413 sq. km)
Water area (2000): 1.356284 sq. miles (3.512760 sq. km)
Total area (2000): 86.010118 sq. miles (222.765173 sq. km)
Located within: Nebraska (NE)
Location: 41.988034 N, 96.265457 W
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Common Misspellings > |
68020 868020 86020 686020 8020 668020 60820 680820 6020 688020 68200 680200 6820 680020 68002 680202 6800 680220 680020 6802 680200 58020 658020 568020 78020 678020 768020 &8020 6&8020 &68020 t8020 6t8020 t68020 y8020 6y8020 y68020 u8020 6u8020 u68020 67020 687020 678020 69020 689020 698020 6(020 68(020 6(8020 6u020 68u020 6u8020 6i020 68i020 6i8020 6o020 68o020 6o8020 68920 680920 689020 68(20 680(20 68(020 68o20 680o20 68o020 68p20 680p20 68p020 680@0 6802@0 680@20 68010 680210 680120 68030 680230 680320 680q0 6802q0 680q20 680w0 6802w0 680w20 680e0 6802e0 680e20 68029 680209 680290 6802( 68020( 6802(0 6802o 68020o 6802o0 6802p 68020p 6802p0 Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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