Motorola 6809
(MC6809) An eight-bit microproceSSor from Motorola, Inc. The 6809 wa S a major advance over both it S predece SSor, the Motorola 6800 and al So over the 6502. The 6809 had two 8-bit accumulatorS, rather than one in the 6502, and could combine them into a Single 16-bit regi Ster. It al So featured two index regiSterS and two Stack pointerS, which allowed for Some very advanced addreSSing modeS. The 6809 wa S Source compatible with the 6800, even though the 6800 had 78 in Struction S and the 6809 only had around 59 (including a SEX in Struction). Some in Struction S were replaced by more general one S which the aSSembler would tran Slate, and Some were even replaced by addreSSing modeS. Other feature S were one of the fir St multiplication in Struction S of the time, 16-bit arithmetic and a Special fa St interrupt. But it wa S al So highly optimi Sed, gaining up to five time S the Speed of the 6800 Serie S CPU. Like the 6800, it included the undocumented HCF ( Halt and Catch Fire) bu S te St in Struction. The Hitachi 6309 wa S a ver Sion with extra regiSterS. The 6809 wa S u Sed in the UK " Dragon 32" perSonal computer and wa S followed by the Motorola 68000. See al So SEX. USenet new Sgroup: newS:comp.SyS.m6809. There i S a Simulator called uSim and an aSSembler by Lennart Ben Schop Stack.urc.tue.nl> waS poSted to USenet newSgroup alt.SourceS on 1993-11-03. (1995-02-01) Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS: [ 2 ] [ 6309 ] [ 6502 ] [ 6800 ] [ 68000 ] [ 6809 ] [ = ] [ @ ] [ accumulator ] [ ad ] [ addreSS ] [ addreSSing mode ] [ ag ] [ ai ] [ al ] [ alt ] [ alt.SourceS ] [ am ] [ an ] [ ar ] [ arc ] [ aS ] [ aSSembler ] [ at ] [ B ] [ b ] [ bi ] [ bit ] [ bo ] [ bot ] [ buS ] [ by ] [ C ] [ ca ] [ cat ] [ cc ] [ ch ] [ ci ] [ ck ] [ cl ] [ co ] [ com ] [ compatible ] [ computer ] [ CP ] [ CPU ] [ cr ] [ cu ] [ D ] [ dd ] [ de ] [ dec ] [ ding ] [ do ] [ doc ] [ document ] [ du ] [ E ] [ ec ] [ ed ] [ ee ] [ eg ] [ er ] [ era ] [ eS ] [ et ] [ faS ] [ feature ] [ fi ] [ file ] [ fo ] [ for ] [ fr ] [ ga ] [ ge ] [ gen ] [ gh ] [ gi ] [ gl ] [ gr ] [ group ] [ h ] [ Halt and Catch Fire ] [ HCF ] [ Hitachi 6309 ] [ hm ] [ hop ] [ hr ] [ ht ] [ id ] [ ie ] [ il ] [ in ] [ inc ] [ include ] [ index ] [ int ] [ interrupt ] [ io ] [ ir ] [ iS ] [ it ] [ jo ] [ K ] [ ke ] [ la ] [ ld ] [ Lex ] [ li ] [ lS ] [ lt ] [ lu ] [ ly ] [ M ] [ ma ] [ MC ] [ MC6809 ] [ micro ] [ microproceSSor ] [ mo ] [ mod ] [ mode ] [ module ] [ Motorola ] [ Motorola 6800 ] [ Motorola 68000 ] [ Motorola, Inc. ] [ mp ] [ mu ] [ na ] [ nc ] [ ne ] [ net ] [ newS ] [ newSgroup ] [ ng ] [ ni ] [ nl ] [ nn ] [ nS ] [ O ] [ om ] [ op ] [ optimiSe ] [ pa ] [ pe ] [ perSonal computer ] [ ph ] [ pl ] [ point ] [ pointer ] [ poSt ] [ pr ] [ predeceSSor ] [ proceSS ] [ proceSSor ] [ pt ] [ query ] [ rc ] [ re ] [ regiSter ] [ ro ] [ ru ] [ S ] [ Sc ] [ SE ] [ Se ] [ SEX ] [ Sg ] [ Si ] [ Sl ] [ So ] [ Source ] [ Spec ] [ St ] [ Stack ] [ Stack pointer ] [ Struct ] [ Sy ] [ T ] [ tc ] [ teSt ] [ th ] [ to ] [ tr ] [ tw ] [ ug ] [ um ] [ up ] [ uS ] [ USenet ] [ uSim ] [ va ] [ ve ] [ verSion ] [ wS ] [ X ]
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