Summary: The video discusses programming techniques in the 8085 microprocessor, including looping, counters, and time delay. It explains how these techniques can be used to shorten program length, reduce memory usage, and improve execution speed. Key moments: 00:07 Programming techniques like looping, counters, and time delay are crucial for writing efficient programs in microprocessors like 8085, reducing program length and enhancing user experience. -Looping is a technique in microprocessors where tasks are repeated efficiently by calling a short program multiple times, reducing program length, memory space, and execution time. -Looping involves setting up loops using jump instructions, allowing the microprocessor to change the sequence of execution and perform tasks repeatedly, enhancing program efficiency. -In 8085 microprocessors, loops can be categorized into continuous loops that repeat tasks continuously and conditional loops based on specific conditions for task repetition, each serving different programming needs. 08:04 Continuous loops are set up using unconditional jump instructions, while conditional loops use conditional jump instructions based on flag conditions in 8085 assembly language programming. -Explanation of continuous loops using unconditional jump instructions in 8085 assembly language programming. -Description of conditional loops utilizing conditional jump instructions based on flag conditions in 8085 assembly language programming. 16:21 Conditional jump instructions in 8085 microprocessor allow setting up conditional loops for repeated tasks based on fulfillment of conditions, ensuring efficient task execution and loop termination when conditions are not met. -Indexing technique in microprocessors involves referencing objects with sequential numbers, aiding in efficient data retrieval and manipulation within loops. -Using counters in microprocessors involves loading numbers into registers to facilitate counting operations, enabling efficient task repetition and control. 26:02 Counters in microprocessors can be used to repeat tasks multiple times by incrementing or decrementing a counter value, establishing loops for efficient processing. -Establishing loops using counters allows for repetitive task execution, controlling the number of iterations efficiently. -The drawback of fast processing in counters leads to only the final count being observed, necessitating the use of time delay techniques for better monitoring. -Introducing time delays between counts using register loading and decrementing enables better observation of counter increments or decrements for improved monitoring. 34:28 The video explains how to introduce time delays in a program using registers and loops in a microprocessor. By decrementing a register until it reaches zero, the program creates a gap between instructions. -Introduction to setting up a loop for time delay using conditional jump instructions in a microprocessor program. -Exploring techniques for introducing time delays in a program, such as using one register or a register pair. -Demonstrating the process of introducing time delays using one register, loading counts, executing loops, and checking for completion. 42:30 Calculating time delay in a microprocessor involves determining the time needed to execute instructions inside and outside a loop, factoring in clock frequency and machine cycles. Clock period and total time taken for instructions are key in this calculation process. -Understanding the process of calculating time delay in a microprocessor. It involves analyzing the time needed for executing instructions both inside and outside a loop, considering clock frequency and machine cycles. -Detailed breakdown of calculating time delay. Exploring the significance of clock period, total machine cycles required for instructions, and the distinction between executing instructions inside and outside a loop. -Utilizing clock frequency for time calculations. Demonstrating how clock frequency aids in determining clock period, which is crucial for calculating the time taken to execute instructions in a microprocessor. 50:34 The video explains the process of converting a hexadecimal number to a decimal number and calculating the total time delay for executing instructions, including adjustments for conditional jump instructions. The loop delay is calculated based on system clock period and total t states required. -Conversion of hexadecimal to decimal number and calculation of loop delay based on system clock period and total t states required for instructions execution. -Explanation of conditional jump instruction and adjustments needed in the total time delay calculation for the loop execution. -Calculation of adjusted loop delay by subtracting the time taken for three t states from the total loop delay. 59:36 The video explains how to introduce time delays in a program using register pairs in a microprocessor. Register pairs allow for longer delays compared to single registers due to their 16-bit capacity. -Register pairs in microprocessors consist of BC, DE, and HL, each pair being 16 bits, allowing for a maximum count of fff to be loaded into them. -By decrementing a 16-bit number stored in a register pair using the DCX instruction, longer time delays can be achieved in the program. -Setting the zero flag in the accumulator requires specific techniques as the zero flag is only set when the accumulator result is zero, affecting program execution. 1:07:40 The video explains how to set the zero flag by repeatedly looping until the accumulator contents are zero, calculating time delays using register pairs, and introducing time delays using nested loops. -Setting the zero flag by looping until accumulator contents are zero. This technique ensures the zero flag is set when both the accumulator and b register contents are zero. -Calculating time delays using register pairs. The video demonstrates calculating time delays based on the number of t states and clock frequency, providing a detailed example for better understanding. -Introducing time delays using nested loops. Explaining the concept of nested loops for introducing time delays, involving an outside loop and an inside loop to create a delay in program execution. 1:15:44 Using a loop within a loop technique can introduce significant time delays in a program, calculated by repeating instructions multiple times, providing precise control over delays. -Calculating time delays involves determining delays in each loop, multiplying by loop counts, and factoring in clock periods for precise timing control. -The process involves loading registers, decrementing values, and checking conditions to control the flow and duration of the time delay introduced by the loop within a loop technique.
52:00 In calculating time period it is multliplied with 10^-6 but still the answer is in microsecond. we do not have to multiply with 10^-6.
Summary:
The video discusses programming techniques in the 8085 microprocessor, including looping, counters, and time delay. It explains how these techniques can be used to shorten program length, reduce memory usage, and improve execution speed.
Key moments:
00:07 Programming techniques like looping, counters, and time delay are crucial for writing efficient programs in microprocessors like 8085, reducing program length and enhancing user experience.
-Looping is a technique in microprocessors where tasks are repeated efficiently by calling a short program multiple times, reducing program length, memory space, and execution time.
-Looping involves setting up loops using jump instructions, allowing the microprocessor to change the sequence of execution and perform tasks repeatedly, enhancing program efficiency.
-In 8085 microprocessors, loops can be categorized into continuous loops that repeat tasks continuously and conditional loops based on specific conditions for task repetition, each serving different programming needs.
08:04 Continuous loops are set up using unconditional jump instructions, while conditional loops use conditional jump instructions based on flag conditions in 8085 assembly language programming.
-Explanation of continuous loops using unconditional jump instructions in 8085 assembly language programming.
-Description of conditional loops utilizing conditional jump instructions based on flag conditions in 8085 assembly language programming.
16:21 Conditional jump instructions in 8085 microprocessor allow setting up conditional loops for repeated tasks based on fulfillment of conditions, ensuring efficient task execution and loop termination when conditions are not met.
-Indexing technique in microprocessors involves referencing objects with sequential numbers, aiding in efficient data retrieval and manipulation within loops.
-Using counters in microprocessors involves loading numbers into registers to facilitate counting operations, enabling efficient task repetition and control.
26:02 Counters in microprocessors can be used to repeat tasks multiple times by incrementing or decrementing a counter value, establishing loops for efficient processing.
-Establishing loops using counters allows for repetitive task execution, controlling the number of iterations efficiently.
-The drawback of fast processing in counters leads to only the final count being observed, necessitating the use of time delay techniques for better monitoring.
-Introducing time delays between counts using register loading and decrementing enables better observation of counter increments or decrements for improved monitoring.
34:28 The video explains how to introduce time delays in a program using registers and loops in a microprocessor. By decrementing a register until it reaches zero, the program creates a gap between instructions.
-Introduction to setting up a loop for time delay using conditional jump instructions in a microprocessor program.
-Exploring techniques for introducing time delays in a program, such as using one register or a register pair.
-Demonstrating the process of introducing time delays using one register, loading counts, executing loops, and checking for completion.
42:30 Calculating time delay in a microprocessor involves determining the time needed to execute instructions inside and outside a loop, factoring in clock frequency and machine cycles. Clock period and total time taken for instructions are key in this calculation process.
-Understanding the process of calculating time delay in a microprocessor. It involves analyzing the time needed for executing instructions both inside and outside a loop, considering clock frequency and machine cycles.
-Detailed breakdown of calculating time delay. Exploring the significance of clock period, total machine cycles required for instructions, and the distinction between executing instructions inside and outside a loop.
-Utilizing clock frequency for time calculations. Demonstrating how clock frequency aids in determining clock period, which is crucial for calculating the time taken to execute instructions in a microprocessor.
50:34 The video explains the process of converting a hexadecimal number to a decimal number and calculating the total time delay for executing instructions, including adjustments for conditional jump instructions. The loop delay is calculated based on system clock period and total t states required.
-Conversion of hexadecimal to decimal number and calculation of loop delay based on system clock period and total t states required for instructions execution.
-Explanation of conditional jump instruction and adjustments needed in the total time delay calculation for the loop execution.
-Calculation of adjusted loop delay by subtracting the time taken for three t states from the total loop delay.
59:36 The video explains how to introduce time delays in a program using register pairs in a microprocessor. Register pairs allow for longer delays compared to single registers due to their 16-bit capacity.
-Register pairs in microprocessors consist of BC, DE, and HL, each pair being 16 bits, allowing for a maximum count of fff to be loaded into them.
-By decrementing a 16-bit number stored in a register pair using the DCX instruction, longer time delays can be achieved in the program.
-Setting the zero flag in the accumulator requires specific techniques as the zero flag is only set when the accumulator result is zero, affecting program execution.
1:07:40 The video explains how to set the zero flag by repeatedly looping until the accumulator contents are zero, calculating time delays using register pairs, and introducing time delays using nested loops.
-Setting the zero flag by looping until accumulator contents are zero. This technique ensures the zero flag is set when both the accumulator and b register contents are zero.
-Calculating time delays using register pairs. The video demonstrates calculating time delays based on the number of t states and clock frequency, providing a detailed example for better understanding.
-Introducing time delays using nested loops. Explaining the concept of nested loops for introducing time delays, involving an outside loop and an inside loop to create a delay in program execution.
1:15:44 Using a loop within a loop technique can introduce significant time delays in a program, calculated by repeating instructions multiple times, providing precise control over delays.
-Calculating time delays involves determining delays in each loop, multiplying by loop counts, and factoring in clock periods for precise timing control.
-The process involves loading registers, decrementing values, and checking conditions to control the flow and duration of the time delay introduced by the loop within a loop technique.
Thank you ma'am ☺️
Are you writing a subroutine or loop? If they are loops then why you have used RET instruction?
Very veryyyyyyyyyyyyyyyyyyyyyyyy nice 🌸🌸🌸🌸
thank you mam
mentioning one thing please dont waste that much paper