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eetive statements? en tion N And what are the differences between them 2. What's the content of the mode word if we want the 8255
eetive statements? en tion N And what are the differences between them 2. What's the content of the mode word if we want the 8255 working in Made 1 ng Port AS out, Port Bis in and Port Cain 3. What de 0 ons are needed to program counter in an 8254 for binary The initial count is 3000H. Assume the base port address is counting in mode 0? The . main difference between polled I/O and interrupt-driven VO? 4. What are the main differ the source and destination addressing mode in each of these 5. Identify the source and desti instructions. 1) MOV CX, 19H 2) MOV BX, [19] 3) MOV AX, [SI] 4) MOV AX, BX+DI+10H] Section Three: Programming Skills (40 points) 1. Give the possible address rang Address lines A0 through sible address ranges for each address decoder in following figure. lines AO through A13 are used by the memories. A18 A17 A16 A15 A14
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