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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD17P133CS датащи(PDF) 73 Page - NEC |
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UPD17P133CS датащи(HTML) 73 Page - NEC |
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73 / 289 page  CHAPTER 7 SYSTEM REGISTER (SYSREG) 58 Example 4. Processing an array As shown in Figure 7-13, to perform the operation: A(N) = A(N) + 4 (0 ≤ N ≤ 15) on the element A(N) of a one-dimensional array in which an element is 8 bits, the following instructions are executed: M000 MEM 0.00H M001 MEM 0.01H MOV IXH, #0 MOV IXM, #N SHR 3 ; Set the offset of the row address. MOV IXL, #N SHL 1 AND 0FH ; Set the offset of the column address. OR PSW, #.DF.IXE AND 0FH ; IXE ← 1 ADD M000, #4 ; ADDC M001, #0 ; A(N) ← A(N) + 4 In the example above, because an element is 8 bits, the value resulting from left-shifting the N's value by 1 bit is set for the index register. Figure 7-13. Example of Operation When MPE=0 and IXE=1 (Array Processing) 0 1 2 3 4 5 6 7 0 System register Column address A (0) 123456789 A B C D E F A (0) A (8) A (1) A (9) A (2) A (10) A (3) A (11) A (4) A (12) A (5) A (13) A (6) A (14) A (7) A (15) 00H 01H b3 b2 b1 b0 b7 b6 b5 b4 |
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