Answer Posted / tarun aggarwal ymca

Read Interrupt Mask (RIM)
RIM is a multipurpose instruction used to read the status of
interrupts 7.5, 6.5, 5.5 and to
read serial input data bit. RIM loads 8-bit data in the
accumulator with the following
interpretation:
Actually RIM does the following three tasks:
1 Read the interrupt mask (bit 2, 1, 0).
2Identify pending interrupts (bit 6, 5, 4).
3 Receive serial input data bit (bit 7).

SIM is a multipurpose interrupt used to implement the 8085
interrupts (RST 7.5, 6.5, 5.5)
and serial data output. SIM interprets the accumulator
content as follows:
Actually, SIM does the following three tasks:
1Mask the interrupts (bit 2, 1, 0).
2 Reset RST 7.5 (bit 4). This is mainly used to overwrite
RST 7.5 without serving it.
3To implement serial I/O (bit 7, 6). If bit 6 = 1 is used
to enable serial I/O and bit 7 is
used to transmit serial output data bit.

Explain the different modes of operations of the 8086?

950

---

Explain what is the difference between isr & function call?

1016

---

Does alu have any storage facility?

1133

---

What is the function of ale and how does it works?

1006

---

Where the data is transferred in a DMA write operation?

1116

---

Explain what is sim and rim instructions?

1141

---

What are the different types of memory addressing modes?

980

---

Explain dma?

992

---

Define the 8085 instruction format and their classification according to word size?

1019

---

What is the difference between 8085 microprocessor and 8086 microprocessor?

1056

---

Explain the purpose of the status register?

988

---

What is the maximum memory addressable size by the 8086?

1059

---

rtos kernal have memory managament,sheduler and timer but not haveing file system how vxworks allocate file table process in memory? bud gpos have inside kernal

3107

---

What is the purpose of the ale pin?

1079

---

What are the sources of an interrupt?

1039

---