PUSHA           Push All General Registers           Flags: Not altered

PUSHA                                                CPU: 186+
PUSHAD                                               CPU: 386+

        Logic   PUSH eAX
                PUSH eCX
                PUSH eDX
                PUSH eBX
                PUSH eSP        ; SP/ESP before PUSHA
                PUSH eBP
                PUSH eSI
                PUSH eDI

    PUSHA saves the eight general registers on the stack. Note that
    the value pushed for SP/ESP is the original value. The order of
    the registers pushed is correct for a subsequent POPA.

    PUSHAD is the 32-bit form of PUSHA.


    Note
    Some assemblers support a PUSHA extension (PUSHAW) that forces 8
    16-bit word-style push'es regardless of the code segment's size
    attribute (80386+).


    Opcode      Format
    60          PUSHA
    60          PUSHAD


    Length and timing
    Variations  Bytes   8088    186     286     386     486     Pentium
    pusha        1              36      17      18      11       5   NP
    pushad       1               -       -      18      11       5   NP