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Of OT service programs appeal in doing interruptions are usually special _ delay commands with instead is increased
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| bet | 5/10 | | Sana | 04.07.2024 | | Hajmi | 319,4 Kb. | | #266583 |
Bog'liq RGqpeVcTGrACPEqq2WlPDTbgx7NbOwBBfRKOuADM(1)Of OT service programs appeal in doing interruptions are usually special _ delay commands with instead is increased .
the IBM PC goals for user of the program required in place common INT N type special delay from the command use possible .
This delay reasons group software called delay . _
Kiritish/chiqarish qurilmalaridan uzilish signallari, qurilma ma’lumot almashishga tayyor bo’lganda tanlanadi.
Ushbu uzilish signali joriy dasturni to’xtatadi va KChQ ning ma’lumotlar registri yoki buffer xotira bilan va TX yaycheykasi yoki protsessor registrlari (UIR) o’rtasida ma’lumotlar almashuvini ta’minlaydigam maxsus qayta ishlash-dasturini ishga tushiradi. Bu kiritish-chiqarish usuli odatda TQ (printer, klaviatura va boshqalar) ga xizmat ko’rsatish uchun ishlatiladi.
OT ning servis dasturlariga murojaat qilishda uzilishlar, odatda, maxsus uzilish buyruqlari bilan amalga oshiriladi.
IBM PC-da bunday maqsadlar uchun foydalanuvchi dasturining kerakli joyida uchraydigan INT N turidagi maxsus uzilish buyrug’idan foydalanish mumkin.
Ushbu uzilish sabablari guruhini dasturiy uzilish deb nomlashadi.
Interruption services
Delay from TQ basic of the program to be completed harm deliver variat appear to be possible .
That's the way it is not to put for in the processor delay signals again work settings opportunity giving interruptions protection to do system to be possible .
Processor interruptions again performance possible
- delay arrival on suddenly ,
- them again work a how much to time leaves ,
- interrupt masking from the mechanism using Entirely throw is removed .
Usually delay operations only current of the command completion over later is done .
Uzilish xizmatlari
TQ-dan uzilish asosiy dasturning bajarilishiga zarar yetkazadigan variat paydo bo’lishi mumkin.
Bunga yo’l qo’ymaslik uchun protsessorda uzilish signallarini qayta ishlashini sozlash imkonini beradigan uzilishlardan himoya qilish tizimi bo’lishi mumkin.
Protsessor uzilishlarni qayta ishlashi mumkin
- uzilish kelishi bo’yicha birdaniga,
- ularni qayta ishlashni bir qancha vaqtga qoldiradi,
- uzilishni maskalash mexanizmidan foydalanib butunlay tashlab ketiladi.
Odatda uzilish operatsiyalari faqat joriy buyruqning bajarilishi tugagandan keyingina bajariladi.
Bitta interrupt again running at the time one other or a how many other devices delay alarms get like , again a situation to be possible .
Such the problem solve ikikita method available :
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