Question: please solve all 26. Explain the function of the two DMA signals HOLD and HLDA. 27. Some of the pins of 8085 are listed below.

please solve all 26. Explain the function of the two DMA

signals HOLD and HLDA. 27. Some of the pins of 8085 are

please solve all

26. Explain the function of the two DMA signals HOLD and HLDA. 27. Some of the pins of 8085 are listed below. For each pin (line) show whether it is an input line or output line and mention its function. (1) ALE (2) HOLD (3) SID (4) READY (5) TRAP 6)SOD 7) IO/M 28. Bring out the distinguishing features between memory mapped I/O scheme and I/O mapped I/O scheme. 36. For a 8085 based system, let the following two instructions are carried out LXI SP, 0000 H PUSHD With D = 09 H and E = FA H assumed. Show the stack contents after PUSH operation. 37. Explain the function of the following program. LXI B, 1000H Label DCXB MOV A, C ORAB JNZ Label

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