Sixteen-segment display Sixteen-segment display A sixteen-segment display (SISD) is a type of display based on 16 segments that can be turned on or off according to the graphic pattern to be produced. It is an extension of the more common seven-segment display, adding four diagonal and two vertical segments and splitting the three horizontal segments in half. Other variants include the fourteen-segment display which does not split the top or bottom horizontal segments, and the twenty two-segment display that allows lower-case characters with descenders. Often a character generator is used to translate 7-bit ASCII character codes to the 16 bits that indicate
Sixteen Prefectures based in modern-day Beijing commanded 11 of the Sixteen Prefectures. The other seven were commanded by the Hedong Commandery based in Yunzhou, modern Datong. The historian Frederick W. Mote writes that there were actually 19 prefectures but does not specify them. Chinese historians do not consider Yíngzhou (营州; modern Qian'an, Hebei) and Pingzhou (平州; modern Lulong, Hebei) to be part of the Sixteen Prefectures because they had already been occupied by the Khitans during the Later Tang, prior to Shi Jingtang’s cession. Yizhou (易州; modern Yi County, Hebei), which fell to the Khitans after the cession, is also excluded from