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The SIM instruction in the 8085 is Set Interrupt Mask. You can use it to set and clear the three interrupt masks for RST7.5, RST6.5, and RST5.5, as well as to set or clear the SOD (Serial Output Data) pin. You can also reset the pending RST7.5 interrupt, if desired.
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Instruction that are present in 8085 and not in 8080?
RIM, SIM, RST, to name three.
Difference between 8080 and 8085?
The 8085 has a single +5V power supplyThe 8085 has a multiplexed low order address busThe 8085 has extra single pin interrupts, TRAP, RST7.5, RST6.5, and RST5.5The 8085 has serial I/O pins SID and SODThe 8085 has maskable interrupts and the RIM/SIM instructionThe 8085 includes the functionality of the 8224 clock genereator and 8228 system controllerThe 8085 added several 16 bit operations
What is SIM and RIM instruction in microprocessor?
RIM stands for read interrupt mask and SIM stands for set interrupt mask.The SIM instruction is used to copy the contents of the accumulator into the interrupt mask.The RIM instruction is used to interpret the RST interrupt positions.
Why the name 8085 Why the name 8085 for microprocessor?
8085 is a microprocessor designed by Intel
Can a program written in 8085 microprocessor run in 8086 microprocessor?
No. They have a different instruction set. However, the processors are sufficiently similar that an 8086 assembler could assemble an 8085 program, given appropriate constants and macros. Some things, however, such as RIM, SIM, RST, etc. do not have equivalents in the 8086.
What is masking in 8085?
Masking in the 8085 is when certain interrupts are disabled, or masked, by instruction execution. TRAP is not maskable. INTR, RST7.5, RST6.5, and RST5.5 are maskable as a group with the EI and DI instructions. RST7.5, RST6.5, and RST5.5 are selectively maskable, even after the EI instruction, by using the RIM and SIM instructions.
How can mask or unmask the interrupts in 8085?
DI = Disable all interrupts (except TRAP) EI = Enable all interrupts Also, SIM can selectively mask RST5.5, RST6.5, and RST7.5.
Why the 16 bit 8085 microprocessor is not possible?
The 8085 was replaced with the 8086/8088. As such, there is no 16 bit version of the 8085.
What are the instruction to reset RST 7.5?
To reset the pending RST 7.5 instruction in the 8085, you need to execute a SIM instruction with a particular value in the accumulator. PUSH FLAGS MVI A,10H SIM POP FLAGS Of course the PUSH and POP are optional, if you don't need to preserve the value of the accumulator.
What is themeaning of pipe lines for 8085 microprocessor?
The 8085 is not pipelined.
When 8085 processor was invented?
The 8085 was introduced by Intel in 1977.
What do '8085' in 8085 Microprocessor signify?
The '8085' in the 8085 microprocessor is the designation given to the microprocessor by Intel. The '5' means it is a single power supply (5 volt) version of the 8080, with enhancements.
