Software-controlled exchange Preparedness
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This lab is implemented following task:
1) Send program («com» \u200b\u200bfile) sequentially performed:
2) Clear the screen.
3) Reading and displays the contents of the interrupt mask register (address 21h) in binary or hexadecimal format.
4) Prohibition of hardware interrupts from the keyboard.
5) Reading readiness of the keyboard to change the corresponding bit in the interrupt request register (IRR).
6) When ready the keyboard if you press "Esc" to restore the keyboard interrupt and exit the program.
7) In addition, the variant with check availability keyboard Polling status register of the keyboard controller.
1) Send program («com» \u200b\u200bfile) sequentially performed:
2) Clear the screen.
3) Reading and displays the contents of the interrupt mask register (address 21h) in binary or hexadecimal format.
4) Prohibition of hardware interrupts from the keyboard.
5) Reading readiness of the keyboard to change the corresponding bit in the interrupt request register (IRR).
6) When ready the keyboard if you press "Esc" to restore the keyboard interrupt and exit the program.
7) In addition, the variant with check availability keyboard Polling status register of the keyboard controller.