PUSHA/PUSHAD - Push All Registers onto Stack (80188+ only)

	Usage:	PUSHA
		PUSHAD	(386+ only)
	Modifies flags: None

	Pushes all general purpose registers onto the stack in the following
	order: (E)AX, (E)CX, (E)DX, (E)BX, (E)SP, (E)BP, (E)SI, (E)DI.	The
	value of SP is the value before the actual push of SP.

				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	none		  -	19    24    11		  1

	- see Instruction Timing