software interrupt การใช้

• One of the most useful DOS software interrupts was interrupt 0x21.
• Windows applications call the syscall table via software interrupt " int 0x2e ".
• EMS functions are accessible through software interrupt 67h.
• The interrupt table contains handlers for hardware interrupts, software interrupts, and exceptions.
• The theory was that hardware interrupts would interrupt again but software interrupts would only happen once.
• Some instruction set designers reserve one or more opcodes for some kind of system call or software interrupt.
• One example of a software interrupt handler ( there are many others ) is in table entry 0x2e.
• Windows maps not only hardware interrupt levels to its internal interrupt table, but also maps software interrupts.
• OS modules are accessed via software interrupts ( SWIs ), similar to system calls in other operating systems.
• IF does not affect the handling of non-maskable interrupts or software interrupts generated by the INT instruction.
• MS-DOS compatibility was added late in the design, so hardware interrupts and MS-DOS software interrupts overlapped.
• Instruction that triggers a software interrupt, and 13 hex is the interrupt number ( as a hexadecimal value ) being called.
• Most Unix systems and derivatives do not use software interrupts, with the exception of interrupt 0x80, used to make system calls.
• The events initially originate from actions on the operating system level, such as interrupts generated by hardware devices, software interrupt instructions, or state changes in polling.
• The number of hardware interrupts is limited by the number of interrupt request ( IRQ ) lines to the processor, but there may be hundreds of different software interrupts.
• When the frame to be projected and the frame being projected has considerable difference a software interrupt is asserted and new chroma values for pixels and brightness values are calculated.
• Interrupt handlers are initiated by either hardware interrupts or software interrupt instructions and are used for servicing hardware devices and transitions between protected modes of operation, such as system calls.
• Use of the IDT is triggered by three types of events : hardware interrupts, software interrupts, and processor exceptions, which together are referred to as " interrupts ".
• The 16 hardware and the 16 software interrupt vectors each consist of a pair of PC and WP values, so the register context switch is automatically performed by an interrupt as well.
• This is implemented in the language core itself by adding hooks into the Commodore 64's software interrupt routines . ( The language does not support adding your own interrupt hooks .)