| dbo:abstract |
The Electronic Arrays 9002, or EA9002, was an 8-bit microprocessor released in 1976. It was designed to be easy to implement in systems with few required support chips. It included 64 bytes of built-in RAM and could be directly connected to TTL devices. It was packaged in a 28-pin DIP which made it less expensive to implement than contemporary designs like the 40-pin MOS 6502 and Zilog Z80. Today it would be known as a microcontroller, although that term did not exist at the time. The 28-pin design did not have enough pins left over to implement a 16-bit address bus, and instead had 12 address lines which limited main memory to 4,096 bytes. This was not a significant limitation at the time, as memory was still very expensive and the target market could often make do with the internal RAM. There was a single 8-bit accumulator used for arithmetic and eight 8-bit registers it could use for storing temporary values. These were supported by another eight 4-bit registers which acted as the most significant bits of the 8-bit registers, extending them to 12-bits for indexing and similar address manipulation. Electronic Arrays (EA) had problems with the new depletion-load NMOS logic fabrication line and struggled with deliveries. By 1977, the 6502 and Z80 had taken over much of the market, and in November EA stopped selling the design. The company was sold to NEC the next year. (en) |
| dbo:thumbnail |
wiki-commons:Special:FilePath/Electronic_Arrays_9002.png?width=300 |
| dbo:wikiPageExternalLink |
http://www.swtpc.com/mholley/Microprocessors/EDN_Sep_20_1975_6502.pdf https://amigan.yatho.com/AnIntroductionToMicroprocessorsVol2.pdf https://web.archive.org/web/20160424050556/http:/www.swtpc.com/mholley/Microprocessors/EDN_Sep_20_1975_6502.pdf http://www.bitsavers.org/components/eeTimes/EE_Times_Integrated_Circuit_Applications_1976.pdf |
| dbo:wikiPageID |
57663349 (xsd:integer) |
| dbo:wikiPageLength |
16739 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID |
1096360495 (xsd:integer) |
| dbo:wikiPageWikiLink |
dbr:Electronic_Arrays dbr:Microcomputer dbr:Read-only_memory dbr:Binary_coded_decimal dbr:Depletion-load_NMOS_logic dbr:Intel_4040 dbr:Monterey,_California dbr:Most_significant_bit dbr:Mostek dbr:NEC dbr:Transistor-transistor_logic dbr:Arithmetic_logic_unit dbr:MOS_Technology dbr:Macro_assembler dbr:Call_stack dbr:Subroutine dbr:Computer_program dbr:Zilog_Z80 dbr:Address_space dbr:Dual_in-line_package dbr:8-bit dbr:Adam_Osborne dbc:Computer-related_introductions_in_1976 dbr:Flip-flop_(electronics) dbr:Fairchild_F8 dbr:Microcontroller dbr:Power_supply dbr:Texas_Instruments dbc:8-bit_microprocessors dbr:FORTRAN_IV dbr:IBM_System/360 dbr:Cash_register dbr:Random-access_memory dbr:Single-board_computer dbr:Transistor–transistor_logic dbr:National_CSS dbr:MOS_6502 dbr:Electronic_calculator dbr:Dynamic_RAM dbr:Static_RAM dbr:Circuit_board dbr:RCA_COSMAC dbr:Main_memory dbr:Design_win dbr:Intel_8212 dbr:Rockwell_PPS-8 |
| dbp:addressWidth |
12 (xsd:integer) |
| dbp:arch |
Electronic Arrays 9002 (en) |
| dbp:dataWidth |
8 (xsd:integer) |
| dbp:instructions |
55 (xsd:integer) |
| dbp:manuf |
dbr:Electronic_Arrays |
| dbp:name |
Electronic Arrays 9002 (en) |
| dbp:pack |
28 (xsd:integer) |
| dbp:slowUnit |
MHz (en) |
| dbp:slowest |
4 (xsd:integer) |
| dbp:wikiPageUsesTemplate |
dbt:Cite_book dbt:Cite_conference dbt:Cite_journal dbt:Efn dbt:End_date dbt:Mono dbt:Notelist dbt:Reflist dbt:Sfn dbt:Short_description dbt:Start_date_and_age dbt:Use_American_English dbt:Use_mdy_dates dbt:Infobox_CPU |
| dcterms:subject |
dbc:Computer-related_introductions_in_1976 dbc:8-bit_microprocessors |
| rdfs:comment |
The Electronic Arrays 9002, or EA9002, was an 8-bit microprocessor released in 1976. It was designed to be easy to implement in systems with few required support chips. It included 64 bytes of built-in RAM and could be directly connected to TTL devices. It was packaged in a 28-pin DIP which made it less expensive to implement than contemporary designs like the 40-pin MOS 6502 and Zilog Z80. Today it would be known as a microcontroller, although that term did not exist at the time. (en) |
| rdfs:label |
Electronic Arrays 9002 (en) |
| owl:sameAs |
wikidata:Electronic Arrays 9002 https://global.dbpedia.org/id/5q4rp |
| prov:wasDerivedFrom |
wikipedia-en:Electronic_Arrays_9002?oldid=1096360495&ns=0 |
| foaf:depiction |
wiki-commons:Special:FilePath/Electronic_Arrays_9002.png |
| foaf:isPrimaryTopicOf |
wikipedia-en:Electronic_Arrays_9002 |
| is dbo:wikiPageRedirects of |
dbr:EA9002 |
| is dbo:wikiPageWikiLink of |
dbr:Electronic_Arrays dbr:List_of_microprocessors dbr:12-bit_computing dbr:EA9002 |
| is foaf:primaryTopic of |
wikipedia-en:Electronic_Arrays_9002 |
