CrazyEngineers
CrazyEngineers

  • What about the other 3-bits in flag register ?

    Morningdot Hablu

    Morningdot Hablu

    @morningdot-6Xuj4M
    Updated: Oct 26, 2024
    Views: 1.3K
    Actually i have a silly doubt,
    As we know our intel microprocessor have 5 flags and 1-bit space is alloted for each flag.
    Flag register we are going to use is of 8-bits so 5-bits are used for the 5 different types of flag signal but But what about the other 3 bits ??
    How these other 3 bits are used ??

    0
    Replies
Howdy guest!
Dear guest, you must be logged-in to participate on CrazyEngineers. We would love to have you as a member of our community. Consider creating an account or login.
Replies

  • shreyasm89

    Member • Oct 11, 2010

    They are "don't care" bits. I feel they must be utilised for verifyimg the presence of grabage value in the accummulator. Just a wild guess
    Are you sure? This action cannot be undone.
    Cancel

  • cbaber

    Member • Oct 11, 2010

    Pretty much everything is based off of bits and bytes. 8 bits is 1 byte. 8 bits is going to be the minimum of any register because having everything in byte sized increments makes it easier to work with. If only 5 of 8 bits are used, the others are, like shreyasm89 said, dont care bits. They are not used.
    Are you sure? This action cannot be undone.
    Cancel

  • Harshad Italiya

    Member • Oct 12, 2010

    shreyasm89
    They are "don't care" bits. I feel they must be utilised for verifyimg the presence of grabage value in the accummulator. Just a wild guess
    They are not used bits in this controller but they are also been configured in the higher version of the controller.
    Are you sure? This action cannot be undone.
    Cancel

  • Morningdot Hablu

    Member • Oct 12, 2010

    godfather
    but they are also been configured in the higher version of the controller.
    You mean to say that in newer version of microprocessor no of flag bit's is extended to 8 ?
    Can you tell me which 3 extra flag is added ?
    Are you sure? This action cannot be undone.
    Cancel

  • Harshad Italiya

    Member • Oct 15, 2010

    mohit007kumar00
    You mean to say that in newer version of microprocessor no of flag bit's is extended to 8 ?
    Can you tell me which 3 extra flag is added ?
    No not like that.. see microprocessor and controller are very basic things...
    Now a days Microcontroller manufacturer company has given variety of controllers in which there are inbuilt ADC more port Pin.. or according to requirement in industry only 8 Pin IC is also available so according to features inbuilt in IC the flag register may be change or sometimes there are more than one register to indicate status of particular operation.
    Are you sure? This action cannot be undone.
    Cancel
Home Channels Search Login Register