Question: 5.- Two new external memory chips need to be added to a microprocessor system - a 4Kbyte RAM that should begin at $8800, and a

5.- Two new external memory chips need to be added to a microprocessor system - a 4Kbyte RAM that should begin at $8800, and a 2Kbyte EPROM that should begin at SB800 Regions $9800-S9FFF, SB600-SB7FF & SC000-SFFFF of the memory map are in use already and conflict should be avoided. (a) Fill in the blanks beside and inside the memory chips with the appropriate numbers. The number on top of this symbol of lines on that bus represents the number [5 pts] (b) Ei & E2 are the active-low chip select pins for the RAM & EPROM chips, respectively. Find their Boolean expressions. Use the minimum number of lines and gates possible. Use decoder outputs to minimize decoding logic. Complete the connections in the figure below (adding logic gates where needed) to create the address decoding specified. [7 pts] Note: The 'S' sign indicates the number following it is a hexadecimal number 8. Data Bus (D7-D o) 16 Address Bus (A15-Ao) 2 A - Ao 4K x 8 RAM begins at E-clockE YO Y1 Y2 Y3 Y4 Y5 Y6 E, e E1 $8800 2 A14 HC138 2K x 8 EPROM begins at E2 $8800 5.- Two new external memory chips need to be added to a microprocessor system - a 4Kbyte RAM that should begin at $8800, and a 2Kbyte EPROM that should begin at SB800 Regions $9800-S9FFF, SB600-SB7FF & SC000-SFFFF of the memory map are in use already and conflict should be avoided. (a) Fill in the blanks beside and inside the memory chips with the appropriate numbers. The number on top of this symbol of lines on that bus represents the number [5 pts] (b) Ei & E2 are the active-low chip select pins for the RAM & EPROM chips, respectively. Find their Boolean expressions. Use the minimum number of lines and gates possible. Use decoder outputs to minimize decoding logic. Complete the connections in the figure below (adding logic gates where needed) to create the address decoding specified. [7 pts] Note: The 'S' sign indicates the number following it is a hexadecimal number 8. Data Bus (D7-D o) 16 Address Bus (A15-Ao) 2 A - Ao 4K x 8 RAM begins at E-clockE YO Y1 Y2 Y3 Y4 Y5 Y6 E, e E1 $8800 2 A14 HC138 2K x 8 EPROM begins at E2 $8800
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