IO AND MEMORY INTERFACE
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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upper address memory bank
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even address memory bank
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static upper memory
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odd address memory bank
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Detailed explanation-1: -In static memory, the upper 8-bit bank is called odd address memory bank. In static memory, the lower 8-bit bank is called even address memory bank. In general, linear decoding is used to minimise the required hardware. The two 4K*8 chips of RAM and ROM are arranged in parallel.
Detailed explanation-2: -How many address lines are required to connect a 4 KB RAM to a microprocessor? Explanation: 4 KB RAM is equal to 4096 × 8 bits. Total number locations are (4096 × 8)/8 = 4096 and 4096 = 212. So, 12 address lines are required to connect a 4 KB RAM to a microprocessor.
Detailed explanation-3: -Solution. The last address in the map of 8086 is FFFFFH. After resetting, the processor starts from FFFFOH. Hence this address must lie in the address range of EPROM.
Detailed explanation-4: -The 8086 has a 16-bit data bus. Memory is arranged in two 8-bit banks low bank: contains all even addresses. high bank: contains all odd addresses. W1 is stored on an even (aligned) address.