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Write a Terminate and Stay Resident program in Assembly language to change the background color of DOS-screen after every ten seconds You will need to hook timer interrupt real time interrupt for t?
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∙ 13y ago
Download NGASM Assembler from
www.BestDiskRecovery.com/ngasm/index.html
The included Programmer's Manual comes with TSR examples.
But you will have to do your stuff on the 10 seconds, etc...
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∙ 13y ago
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What does the RET statement do in assembly language?
RETurn from a subrutin or interrupt handler.
Describe the sequence of events that takes place when an interrupt is raised?
Interrupt Handling 1. Hardware stacks program counter, etc. 2. Hardware loads new program counter from interrupt vector. 3. Assembly language procedure saves registers. 4. Assembly language procedure sets up new stack. 5. C interrupt service runs (typically reads and buffers input). 6. Scheduler decides which process is to run next. 7. C procedure returns to the assembly code. 8. Assembly language procedure starts up new current process.
Disadvantage of writing OS in high level language such as C?
Nothing. Every modern OS is written in C, except for some little special parts (like interrupt-handling) that are written in Assembly.
What is interrupt in assembly language?
An interrupt (for example, Intel-based opcode 0xCD) causes the CPU to pause its current execution, store the state of the registers on the stack, then process a defined subroutine. When this subroutine completes, the interrupt finishes, the registers are restored from the stack, and the previous execution state resumes. Interrupts come in two basic flavors: hardware and software. A hardware interrupt occurs when a connected piece of hardware raises an IRQ signal. This mechanism tells the CPU that the hardware has information that needs to be processed. This is more efficient than polling for devices that have relatively few inputs or that have a latency that the CPU shouldn't wait for. Keyboards and mice are often interrupt-driven; the CPU only needs to know when something interesting has happened (a key was pressed or the mouse was moved, for example). Hard drives are also interrupt-driven; this allows the hard drive to locate the requested data and then return that data some CPU cycles later without the CPU having to request the status of the operation repeatedly. In contrast, a software interrupt is usually triggered by software as a means of invoking operating system code in a reliable manner. For example, in MS-DOS, a developer would call INT 0x21 in order to invoke typical DOS commands, such as reading or writing a file, obtaining keyboard input, and other basic operations. Most older operating systems running on Intel-compatible processors use software interrupts to provide a way for the program to access system functions. Newer operating systems use new opcodes that circumvent the need for software interrupts, although most platforms still provide this mechanism for legacy software.
What is meant by convocation of btech?
It's an assembly or gathering for a ceremony, such as graduation.It's an assembly or gathering for a ceremony, such as graduation.It's an assembly or gathering for a ceremony, such as graduation.It's an assembly or gathering for a ceremony, such as graduation.It's an assembly or gathering for a ceremony, such as graduation.It's an assembly or gathering for a ceremony, such as graduation.
What does the RET statement do in assembly language?
RETurn from a subrutin or interrupt handler.
Describe the sequence of events that takes place when an interrupt is raised?
Interrupt Handling 1. Hardware stacks program counter, etc. 2. Hardware loads new program counter from interrupt vector. 3. Assembly language procedure saves registers. 4. Assembly language procedure sets up new stack. 5. C interrupt service runs (typically reads and buffers input). 6. Scheduler decides which process is to run next. 7. C procedure returns to the assembly code. 8. Assembly language procedure starts up new current process.
Is pseudo code is a) high level language b) assembly language c) machine language?
in RST interrupt , RST STAND FOR
Why interrupt handlers are written in assembly language?
When an interrupt is requested, the currently running process is suspended and the handler is invoked. When the handler exits, control is handed back to the running process. Since interrupts are practically random and unplanned, when the handler passes back control, it must ensure that all registers and stacks that it used are restored back to the exact state they were in when the process got interrupted, so that the process can resume like as though nothing happened. Access to these registers and stacks can only be done in assembly. Other reasons include the fact that interrupt handlers must be very fast, and since the interrupt routines are very short, they can be hand‐crafted to be much faster than anything a compiler generates.
How will studying assembly language enhance your understanding of operating systems?
Assembly language is a good tool for learning how applications programs communicate with the computer's operating system via interrupt handlers, system calls, and common memory areas. Assembly language programming also helps when learning how the operating system loads and executes application programs.
Disadvantage of writing OS in high level language such as C?
Nothing. Every modern OS is written in C, except for some little special parts (like interrupt-handling) that are written in Assembly.
Were the plebeians represented by the assembly?
Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.Yes, there was a plebeian assembly and it was by this assembly that the tribunes were elected.
In visual basic dot net application what are the types of assembly?
process assembly library assembly private assembly shared assembly satellite assembly
What is interrupt in assembly language?
An interrupt (for example, Intel-based opcode 0xCD) causes the CPU to pause its current execution, store the state of the registers on the stack, then process a defined subroutine. When this subroutine completes, the interrupt finishes, the registers are restored from the stack, and the previous execution state resumes. Interrupts come in two basic flavors: hardware and software. A hardware interrupt occurs when a connected piece of hardware raises an IRQ signal. This mechanism tells the CPU that the hardware has information that needs to be processed. This is more efficient than polling for devices that have relatively few inputs or that have a latency that the CPU shouldn't wait for. Keyboards and mice are often interrupt-driven; the CPU only needs to know when something interesting has happened (a key was pressed or the mouse was moved, for example). Hard drives are also interrupt-driven; this allows the hard drive to locate the requested data and then return that data some CPU cycles later without the CPU having to request the status of the operation repeatedly. In contrast, a software interrupt is usually triggered by software as a means of invoking operating system code in a reliable manner. For example, in MS-DOS, a developer would call INT 0x21 in order to invoke typical DOS commands, such as reading or writing a file, obtaining keyboard input, and other basic operations. Most older operating systems running on Intel-compatible processors use software interrupts to provide a way for the program to access system functions. Newer operating systems use new opcodes that circumvent the need for software interrupts, although most platforms still provide this mechanism for legacy software.
What is some background information on J. T. Battenberg?
He started working on the assembly line at General Motors in 1961. He received a bachelor's degree in 1966 from the General Motors Institute, now known as Kettering University.
What is difference between machine code and assembly language?
Machine language is the actual instructions in computer memory that are fetched into the processor and executed. It is directly executable and consists of what look to most human beings like a bunch of hexadecimal numbers, though a few geeks such as myself can tell it is code instead of numbers. For example, the instructions executing interrupt 21, service 10, are: B410 CD21 Assembly language is a human readable as mnemonics, it translates on a one for one basis into machine language. The computer cannot execute assembly language directly, but human beings who are trained can understand it. The assembly language equivalent of the above instructions is: MOV AH,10 ; prepare for service 10 by putting 10 into AH INT 21 ; vectors into code established in the interrupt table
What is an assembly of listeners or spectators called?
An assembly of listeners or an assembly of spectators is use of the collective noun, assembly.
