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  2. RL78 - Wikipedia

    en.wikipedia.org/wiki/RL78

    The RL78 family is an accumulator-based register-bank CISC instruction set architecture (ISA). [2] Although it has eight 8-bit registers or four 16-bit register pairs, essentially all arithmetic operations are performed on a single accumulator (the A register or AX register pair).

  3. Accumulator (computing) - Wikipedia

    en.wikipedia.org/wiki/Accumulator_(computing)

    In a computer's central processing unit (CPU), the accumulator is a register in which intermediate arithmetic logic unit results are stored.. Without a register like an accumulator, it would be necessary to write the result of each calculation (addition, multiplication, shift, etc.) to cache or main memory, perhaps only to be read right back again for use in the next operation.

  4. Comparison of instruction set architectures - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_instruction...

    An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.

  5. Interrupts in 65xx processors - Wikipedia

    en.wikipedia.org/wiki/Interrupts_in_65xx_processors

    The accumulator, however, is really two registers: designated .A and .B. [2] Pushing the accumulator when it is set to 8 bits will not preserve .B, [2] which could result in a loss of transparency should the ISR change .B in any way. Therefore, the accumulator must always be set to 16 bits before being pushed or pulled if the ISR will be using ...

  6. MCS-51 - Wikipedia

    en.wikipedia.org/wiki/MCS-51

    MCS-51-based microcontrollers typically include one or two UARTs, two or three timers, 128 or 256 bytes of internal data RAM (16 bytes of which are bit-addressable), up to 128 bytes of I/O, 512 bytes to 64 KB of internal program memory, and sometimes a quantity of extended data RAM (ERAM) located in the external data space. External RAM and ROM ...

  7. Sign in to AOL Desktop Gold and manage your usernames

    help.aol.com/articles/aol-desktop-signing-on

    1. Launch AOL Desktop Gold. 2. On the sign on screen, click the small arrow pointing down. 3. Click Add Username. 4. Type in another username and click Continue. Enter your password in the window that appears.

  8. 24 Discontinued '70s and '80s Foods That We'll Never Stop Craving

    www.aol.com/24-discontinued-70s-80s-foods...

    3. Keebler Fudge Magic Middles. Neither the chocolate fudge cream inside a shortbread cookie nor versions with peanut butter or chocolate chip crusts survived.

  9. PIC instruction listings - Wikipedia

    en.wikipedia.org/wiki/PIC_instruction_listings

    They are accumulator machines, with a common accumulator "W" being one operand in all 2-operand instructions. In the instruction set tables that follow, register numbers are referred to as "f", while constants are referred to as "k".