dl1 := uint16(d1) & 0x0FFF
	*asm = append(*asm,
		uint8(op>>8),
		uint8(i2),
		(uint8(b1)<<4)|(uint8(dl1>>8)&0x0F),
		uint8(dl1),
		uint8(d1>>12),
		uint8(op))
}

func zSMI(op, m1, b3, d3, ri2 uint32, asm *[]byte) {
	*asm = append(*asm,
		uint8(op>>8),
		uint8(m1)<<4,
		(uint8(b3)<<4)|uint8((d3>>8)&0x0F),
		uint8(d3),
		uint8(ri2>>8),
		uint8(ri2))
}