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Microprocessor

Microprocessor
During OPCODE fetch the state of S0 and S1 is

 01
 11
 10
 00

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits reset (i.e. 00H)
 irrelevant
 all bits set (i.e. FFH)
 same as the content of A7-A0

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Microprocessor
When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are

 always reset
 always set
 affected indicating specific conditions
 not affected

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Microprocessor
The maximum number of seven segment displays that can be connected to 8279 is

 18
 16
 12
 8

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Microprocessor
During which T-state, contents of OP code from memory are loaded into IR (Instruction Register)?

 T1 OP code fetch
 T4 OP code fetch
 T2 OP code fetch
 T3 OP code fetch

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Microprocessor
SUB A instruction in 8085

 reset carry and sign flags
 sets zero and carry flags
 sets zero and sign flags
 reset zero and parity flags

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