73 49 111 01001001 89 59 131 01011001 105 69 151 01101001 121 79 171 01111001 74 4A 112 01001010 90 5A 132 01011010 106 6A 152 01101010 122 7A 172 01111010 75 4B 113 01001011 91 5B 133 01011011 107 6B 153 01101011 123 7B 173 01111011 76 4C 114 01001100 92 5C 134 01011100 108 6C 154 01101100 124 7C 174 01111100 77 4D 115 01001101 93 5D 135 01011101 109 6D 155 01101101 125 7D 175 01111101 78 4E 116 01001110 94 5E 136 01011110 110 6E 156 01101110 126 7E 176 01111110 79 4F 117 01001111 95 5F 137 01011111 111 6F 157 01101111 127 7F 177 01111111 Dec Hex Oct Bin Dec Hex Oct Bin Dec Hex Oct Bin Dec Hex Oct Bin 128 80 200 10000000 144 90 220 10010000 160 A0 240 10100000 176 B0 260 10110000
memory that holds the next instruction to be executed. The IR is the instruction register. When the CPU fetches a program instruction from main memory, this is where it puts it. The COUNT register counts off the steps in a fetch-and-execute cycle. It takes the CPU several steps to fetch and execute an instruction. Hierarhia pistikutest progekeelteni Esimene: programmeerimismeetod: kaablid ja pistikud Teine: von Neumanni arhitektuur, programm malus binaarkoodina:01011101 01001011 01010101 11010101 10101001 ....Lihtsam kirjutada hexas, ntx 4A FC 09 B2 .... Kolmas: Esmane progekeel: assembler. Uks masinakask: tuupiliselt uks rida assembleri-programmi Neljas: Harilik progekeel ehk nn korgkeel (fortran, basic, c, java,python jne jne).Harilikud valemid, if-then-else jne, a la x=2*y+sin(y); Kõrgkeeled on erineva abstraktsusastmega: Masinalähedane ja ebamugav: Fortran, C (portaabel assembler) Abstraktsem ja mugavam: Lisp, Ada, ML, Java, Python,
It takes the CPU several steps to fetch and execute an instruction. When COUNT is 1, it does step 1; when COUNT is 2, it does step 2; and so forth. Remember that as the COUNT register counts 0, 1, 2,..., just one machine language program is being executed Hierarhia pistikutest progekeelteni Esimene: programmeerimismeetod: kaablid ja pistikud Teine: von Neumanni arhitektuur, programm mälus binaarkoodina: 01011101 01001011 01010101 11010101 10101001 .... Lihtsam kirjutada hexas, ntx 4A FC 09 B2 .... Kolmas: Esmane progekeel: assembler. Üks masinakäsk: tüüpiliselt üks rida assembleriprogrammi Neljas: Harilik progekeel ehk nn kõrgkeel (fortran, basic, c, java, python jne jne). Harilikud valemid, if-then-else jne, a la x=2*y+sin(y); Ecki assembler This program counts. It starts by putting the number 1 into memory location 12, and
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