VMS Help MACRO, VAX MACRO Assembler, Instructions, POPR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Purpose:        Restore multiple registers from stack
    Format:         opcode mask.rw
    Operation:      Restore registers in order R14 .. R0
    C. Codes:       Not affected
    Exceptions:     None
    Opcode:         BA    POPR     Pop registers
    Description:    The contents of the registers whose number
                    corresponds to set bits in the mask operand
                    are replaced by longwords popped from the stack.
                    R[n] is pushed if mask <n> is set. The mask is
                    scanned from bit 14 to bit 0. Bit 15 is ignored.